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1. A Promising Phase Change Material with Record High Ionic Conductivity over a Wide Temperature Range of a Plastic Crystal Phase and Magnetic Thermal Memory Effect

Author:
Yin Qian; Dong-Sheng Shao; Wan-Wan Yao; Zhi-Yuan Yao; Lifeng Wang; Wen-Long Liu; Xiao-Ming Ren
Source:
ACS applied materials & interfaces 2020 v.12 no.25 pp. 28129-28138
ISSN:
1944-8252
Subject:
X-ray diffraction; anions; cations; cooling; crystals; differential scanning calorimetry; ferrimagnetic materials; heat; latent heat; light microscopy; magnetism; nickel; phase transition; temperature
Abstract:
... The emerging organic ion plastic crystals (OIPCs) are the most promising candidates used as solid-state electrolytes in a range of ionic devices. To endow an OIPC with additional functionality may create a new type of material for multifunctional devices. Herein, we present an ion plastic crystal, [EMIm][Ni(mnt)₂] (1; [EMIm]⁺ = 1-ethyl-3-methylimidazolium and mnt²– = maleonitriledithiolate), and i ...
DOI:
10.1021/acsami.0c04751

2. Application of metallic nanoparticle-biochars with ionic liquids for thermal transfer fluids

Author:
Hsin-Liang Huang; Zi-Hao Huang; Yi-Cheng Chu; Hong-Ping Lin; Yun-Jung Chang
Source:
Chemosphere 2020 v.250 pp. 126219
ISSN:
0045-6535
Subject:
X-ray diffraction; adsorption; anions; biochar; cations; chlorides; copper; copper hydroxide; cupric oxide; heat transfer; hydrogen bonding; imidazole; ionic liquids; irradiation; lighting; moieties; nanoparticles; nanosilver; nuclear magnetic resonance spectroscopy; silver; solar collectors; solar radiation; temperature; thermal properties
Abstract:
... Ionic liquids (ILs (1-butyl-3-methylimidazolium chloride ([C₄mim][Cl]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([C₄mim][BF₄]))) were used as heat transfer fluids for solar thermal collectors. The additive of ILs was biochar containing copper and silver nanoparticles (Cu–Ag/biochar) to improve the adsorption of solar irradiation and thermal conductivities. After impregnation and reduction ...
DOI:
10.1016/j.chemosphere.2020.126219

3. Highly Stable Polyoxovanadate-Based Zn–MOF with Dual Active Sites as a Solvent-free Catalyst for C–C Bond Formation

Author:
Hongrui Tian; Shumei Liu; Zhong Zhang; Tianyi Dang; Ying Lu; Shuxia Liu
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.12 pp. 4660-4667
ISSN:
2168-0485
Subject:
Lewis acids; Lewis bases; X-ray diffraction; anions; catalysts; catalytic activity; cations; condensation reactions; green chemistry; molecular weight; synergism; zinc
Abstract:
... A polyoxovanadate-based zinc–organic framework, [Zn(bix)]{V₂O₆}(V-Zn-MOF, bix = 1,4-bis(imidazole-1-ylmethyl)benzene), was successfully synthesized under hydrothermal conditions. Single-crystal X-ray analysis reveals that the V-Zn-MOF contains {V₂O₆}ₙ²ⁿ– polyanion chains and [Zn(bix)]²⁺ cation frameworks with open zinc metal sites, which endows V-Zn-MOF-rich Lewis base and acid sites. Considering ...
DOI:
10.1021/acssuschemeng.1c00389

4. Potentiometric detection of copper ion using chitin grafted polyaniline electrode

Author:
Vinay Kr Singh; Chandra Shekhar Kushwaha; S.K. Shukla
Source:
International journal of biological macromolecules 2020 v.147 pp. 250-257
ISSN:
0141-8130
Subject:
X-ray diffraction; anions; cations; chemical structure; chitin; copper; detection limit; electrodes; physical properties; polyaniline; scanning electron microscopes; spectroscopy
Abstract:
... Potentiometric detection of copper ion over chemically interactive and electrically responsive chitin grafted polyaniline (Chit-g-PANI) electrode has been demonstrated for natural as well as artificial samples under optimized conditions using a portable sensing setup. The physical properties and chemical structure of developed electrode were evaluated by different Infrared spectrometry, X-ray diff ...
DOI:
10.1016/j.ijbiomac.2019.12.209

5. Synthesis and characterization of K₅Sn₂OF₁₁

Author:
Christiane Stoll; Markus Seibald; Hubert Huppertz
Source:
Zeitschrift für Naturforschung 2020 v.75 no.1-2 pp. 83-90
ISSN:
1865-7117
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; anions; cations; copper; crystallization; fluorides; potassium
Abstract:
... The potassium oxidofluoridostannate(IV) fluoride K₅Sn₂OF₁₁ was synthesized via a solid-state route at T = 300°C in arc-weldeded copper ampoules. It crystallizes in the orthorhombic system in the acentric space group Ama2 (no. 40) with a unit cell volume of V = 2.5727(4) nm³. The cell parameters are a = 1758.3(2), b = 2452.3(2) and c = 596.7(1) pm. As a main structural motif, K₅Sn₂OF₁₁ exhibits two ...
DOI:
10.1515/znb-2019-0158

6. A novel Zn(II)-based metal-organic framework as a high selective and sensitive sensor for fluorescent detections of aromatic nitrophenols and antibiotic metronidazole

Author:
Jing Wang; Qingqing Zha; Guoxu Qin; Yonghong Ni
Source:
Talanta 2020 v.211 pp. 120742
ISSN:
0039-9140
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; amino acids; anions; antibiotics; benzoic acid; cations; coordination compounds; detection limit; fluorescence; fluorescent dyes; metronidazole; nitrates; nitrophenols; organic matter; thermogravimetry; ultraviolet radiation; zinc
Abstract:
... A novel fluorescent Zn(II)-based metal-organic framework (Zn-MOF), [Zn₂(oba)₄(4,4′-bpy)₂]ₙ, was successfully synthesized through a simple solvothermal route at 130 °C for 48 h, employing Zn(NO₃)₂·6H₂O, 4,4′-Oxybis(benzoic acid) (oba) and 4,4′-Bipyridine (4,4′-bpy) as the initial reactants, dimethylacetamide (DMA) as the reaction medium. The as-obtained Zn-MOF was characterized by X-ray powder diff ...
DOI:
10.1016/j.talanta.2020.120742

7. Antiferroelectric Phase Transition in a Proton-Transfer Salt of Squaric Acid and 2,3-Dimethylpyrazine

Author:
Jeff Lengyel; Xiaoping Wang; Eun Sang Choi; Tiglet Besara; Rico Schönemann; Sanath Kumar Ramakrishna; Jade Holleman; Avery L. Blockmon; Kendall D. Hughey; Tianhan Liu; Jacob Hudis; Drake Beery; Luis Balicas; Stephen A. McGill; Kenneth Hanson; Janice L. Musfeldt; Theo Siegrist; Naresh S. Dalal; Michael Shatruk
Source:
Journal of the American Chemical Society 2019 v.141 no.41 pp. 16279-16287
ISSN:
1520-5126
Subject:
Raman spectroscopy; X-radiation; X-ray diffraction; anions; cations; color; crystal structure; crystallization; engineering; heat; hydrogen bonding; moieties; neutron diffraction; protons; pyrazines
Abstract:
... A proton-transfer reaction between squaric acid (H₂sq) and 2,3-dimethylpyrazine (2,3-Me₂pyz) results in crystallization of a new organic antiferroelectric (AFE), (2,3-Me₂pyzH⁺)(Hsq–)·H₂O (1), which possesses a layered structure. The structure of each layer can be described as partitioned into strips lined with methyl groups of the Me₂pyzH⁺ cations and strips featuring extensive hydrogen bonding be ...
DOI:
10.1021/jacs.9b04473

8. Cellulose hollow fibers for organic resistant nanofiltration

Author:
Gheorghe Falca; Valentina-Elena Musteata; Ali Reza Behzad; Stefan Chisca; Suzana Pereira Nunes
Source:
Journal of membrane science 2019 v.586 pp. 151-161
ISSN:
0376-7388
Subject:
X-ray diffraction; acetates; anions; artificial membranes; biopolymers; cations; cellulose; crystal structure; electron microscopy; ethanol; ionic liquids; nanofiltration; phosphates; solubility; spinning
Abstract:
... Cellulose is the most abundant biopolymer, but it is difficult to process due to its low solubility in most of the solvents. In this work, we demonstrate the preparation, of self-standing and defect-free cellulose hollow fiber membranes made by a sustainable process for filtration in organic solvent medium. The hollow fibers were made by the simple spinning technique using ionic liquids as a solve ...
DOI:
10.1016/j.memsci.2019.05.009

9. Copper-based metal–organic framework nanoparticles for sensitive fluorescence detection of ferric ions

Author:
Fanglin Ming; Jingzhou Hou; Danqun Huo; Jun Zhou; Mei Yang; Caihong Shen; Suyi Zhang; Changjun Hou
Source:
Analytical methods 2019 v.11 no.34 pp. 4382-4389
ISSN:
1759-9679
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; aqueous solutions; atomic absorption spectrometry; cations; coordination compounds; copper; detection limit; environmental monitoring; fluorescence; iron; nanoparticles
Abstract:
... A luminescent amino-functionalized metal–organic framework (Cu–MOFs) was synthesized from 2-aminoterephthalic acid and Cu(ii) ions by a solvothermal method. Cu–MOFs displayed blue fluorescence with a peak at 430 nm under 330 nm excitation. Its structure was characterized by FTIR, TEM, XRD, and XPS. The fluorescence of the Cu–MOFs was quenched by Fe³⁺ in aqueous solutions. The limit of detection wa ...
DOI:
10.1039/c9ay01093a

10. Embellishing bis-1,2,4-triazole with four nitroamino groups: advanced high-energy-density materials with remarkable performance and good stability

Author:
Qing Lang; Qi Sun; Qian Wang; Qiuhan Lin; Ming Lu
Source:
Journal of materials chemistry A 2020 v.8 no.23 pp. 11752-11760
ISSN:
2050-7496
Subject:
X-ray diffraction; anions; cations; hydrogen bonding; physicochemical properties; salts; triazoles
Abstract:
... Preparing high-energy-density materials (HEDMs) with performance comparable or superior to CL-20 has been at the forefront of energetic material research. In response to this challenge, four nitroamino groups were successfully introduced into a bis-1,2,4-triazole backbone to pursue the higher energetic performance. The neutral compound (NT-00) and high-energy salts, including the divalent (D1–D5) ...
DOI:
10.1039/d0ta03008b

11. Enhanced adsorption of cationic Pb(II) and anionic Cr(VI) ions in aqueous solution by amino-modified nano-sized illite-smectite clay

Author:
Zhenyuan Li; Zhidong Pan; Yanmin Wang
Source:
Environmental science and pollution research 2019 v.26 no.11 pp. 11126-11139
ISSN:
1614-7499
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; aqueous solutions; cations; chromium; clay; grinding; lead; models; nuclear magnetic resonance spectroscopy; particle size; particle size distribution; scanning electron microscopy; silicon; sorption isotherms; surface area; temperature; thermogravimetry
Abstract:
... A raw illite-smectite mixed-layered clay (RI/S) was ground for preparing nano-sized I/S clay (NI/S) and subsequently amino-functionalized via grafting of 3-aminopropyltrithoxysilane (APTES) (NH₂-RI/S and NH₂-NI/S, respectively). The samples were characterized by particle size analysis, specific surface area measurement, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric ...
DOI:
10.1007/s11356-019-04447-0

12. Ferromagnetic interactions in a dicyanamide-bridged multinuclear metal-organic framework [Pr₃NH]⁺ [Mn(dca)₃]⁻·H₂O

Author:
Yuan Huang; Xiu-feng Yu; Zhen Rong; Yi-chun Ai; Kun Qian; Jie Yang
Source:
Zeitschrift für Naturforschung 2019 v.74 no.6 pp. 485-489
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; cations; coordination polymers; ferromagnetism; infrared spectroscopy; manganese
Abstract:
... A new complex [Pr₃NH]⁺ [Mn(dca)₃]⁻ · H₂O (dicyanamide = dca⁻) was synthesized, in which the Mn²⁺ cations are bridged by end-to-end dca anions to form three-dimensional [Mn(dca)₃]ₙⁿ⁻ networks and tripropylammonium cations reside in the cavities of these networks. The complex has been characterized by single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, and magnetic measureme ...
DOI:
10.1515/znb-2019-0015

13. Novel betaine-amino acid based natural deep eutectic solvents for enhancing the enzymatic hydrolysis of corncob

Author:
Yuan Liang; Wenjing Duan; Xiaoxi An; Yingyun Qiao; Yuanyu Tian; Haifeng Zhou
Source:
Bioresource technology 2020 v.310 pp. 123389
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; amino acids; anions; betaine; biomass; cations; cellulose; corn cobs; digestibility; enzymatic hydrolysis; lignin; nuclear magnetic resonance spectroscopy; solubility; solvents; water content; xylan
Abstract:
... A novel natural deep eutectic solvent (NDES) with water content ranging from 65 to 93 wt%, in which betaine (Bet) acts as the cation and amino acids (AAs) as the anions, was prepared by a simple and green chemical route. [Bet][AA] NDES showed excellent xylan and lignin solubility, however, scare cellulose solubility. A mild and facile pretreatment process with [Bet][AA] NDES was carried out at 60  ...
DOI:
10.1016/j.biortech.2020.123389

14. Preparation and characterization of polyvinyl chloride based nickel phosphate ion selective membrane and its application for removal of ions through water bodies

Author:
Mohd Arsalan; Aiman Zehra; Mohammad Mujahid Ali Khan; Rafiuddin
Source:
Groundwater for sustainable development 2019 v.8 pp. 41-48
ISSN:
2352-801X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; anions; asymmetric membranes; cations; differential thermal analysis; electrochemistry; energy-dispersive X-ray analysis; groundwater; heavy metals; metal ions; mixing; nickel; phosphates; poly(vinyl chloride); porosity; scanning electron microscopy; sol-gel processing; surface water; sustainable development; thermal stability; thermogravimetry
Abstract:
... Polyvinyl chloride based nickel phosphate (PVC–NP) composite membrane was prepared by cast die method of membrane fabrication. The nickel phosphate (NP) inorganic material has been prepared by the novel sol-gel method which is qualitative method of material synthesis. The composite membrane has been designed by a uniform mixing of the NP and polyvinyl chloride (PVC) materials into 1:3 ratio of per ...
DOI:
10.1016/j.gsd.2018.06.008

15. Removal of phosphate from aqueous solution by ferrihydrite/bagasse composite prepared through in situ precipitation method

Author:
Ru-yi Zhou; Jun-xia Yu; Hong-xia Li; Ru-an Chi
Source:
Colloids and surfaces 2020 v.603 pp. 125144
ISSN:
0927-7757
Subject:
X-ray diffraction; adsorbents; adsorption; anions; aqueous solutions; bagasse; calcium; cations; chlorides; electrostatic interactions; energy-dispersive X-ray analysis; ferrihydrite; isoelectric point; magnesium; nitrates; pH; phosphates; potassium; scanning electron microscopy; sodium; sorption isotherms; sulfates; transmission electron microscopy; wastewater; wastewater treatment; zeta potential
Abstract:
... Ferrihydrite/bagasse composite adsorbent (FH/SCB) was prepared by in situ precipitation method to remove phosphate from aqueous solution. Effects of precipitation pH on adsorption performances of the composites were investigated and adsorption performances and mechanism of phosphate on the composite prepared at the optimum pH for phosphate were studied. Results showed that precipitation pH played ...
DOI:
10.1016/j.colsurfa.2020.125144

16. Reversible Energy Storage in Layered Copper-Based Coordination Polymers: Unveiling the Influence of the Ligand’s Functional Group on Their Electrochemical Properties

Author:
Marco Amores; Keisuke Wada; Ken Sakaushi; Hiroshi Nishihara
Source:
Journal of physical chemistry 2020 v.124 no.17 pp. 9215-9224
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; benzene; cations; coordination polymers; copper; electrochemistry; electrodes; energy; ligands; mass spectrometry; metal ions; models; moieties; structure-activity relationships; voltammetry
Abstract:
... Coordination polymers represent a suitable model for studying redox mechanisms in materials where both metal cations and ligands undergo electrochemical reactions and are capable of proceeding through reversible multielectron-transfer processes with the insertion of cations and anions into their open structures. Designing new coordination polymers for electrochemical energy storage with improved p ...
DOI:
10.1021/acs.jpcc.0c01486

17. Selective removal of heavy metals by hydrotalcites as adsorbents in diverse wastewater: Different intercalated anions with different mechanisms

Author:
Ali Jawad; Li Peng; Zhuwei Liao; Zhihua Zhou; Ajmal Shahzad; Jerosha Ifthikar; Mengmeng Zhao; Zhulei Chen; Zhuqi Chen
Source:
Journal of cleaner production 2019 v.211 pp. 1112-1126
ISSN:
0959-6526
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; anions; cadmium; calcium; carbonates; cations; chlorides; cobalt; copper; heavy metals; hydroxides; lead; mercury; nickel; nitrates; pH; salinity; silver; sodium; sulfates; wastewater; zinc
Abstract:
... The designing of selective and efficient adsorbent for removal of heavy metals from wastewater of diverse chemistry is a challenging task for researchers. Herein, FeMgAl derived from layered double hydroxides (LDH) with different intercalated anions (CO32−, NO3−, S52− and MoS42−) as selective adsorbents were evaluated by considering capturing heavy metals from a complex aqueous environment such as ...
DOI:
10.1016/j.jclepro.2018.11.234

18. Serendipitous formation and characterization of K₂[Pd(NO₃)₄]·2HNO₃

Author:
Michael Zoller; Jörn Bruns; Gunter Heymann; Klaus Wurst; Hubert Huppertz
Source:
Zeitschrift für Naturforschung 2019 v.74 no.4 pp. 381-387
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; cations; crystal structure; crystallization; glass; nitrates; nitric acid; palladium; potassium
Abstract:
... A potassium tetranitratopalladate(II) with the composition K₂[Pd(NO₃)₄] · 2HNO₃ was synthesized by a simple solvothermal process in a glass ampoule. The new compound crystallizes in the monoclinic space group P2₁/c (no. 14) with the lattice parameters a = 1017.15(4), b = 892.94(3), c = 880.55(3) Å, and β = 98.13(1)° (Z = 2). The crystal structure of K₂[Pd(NO₃)₄] · 2HNO₃ reveals isolated complex [P ...
DOI:
10.1515/znb-2019-0018

19. Simultaneous adsorption and immobilization of As and Cd by birnessite-loaded biochar in water and soil

Author:
Hong-Yan Wang; Peng Chen; Yong-Guan Zhu; Kuang Cen; Guo-Xin Sun
Source:
Environmental science and pollution research international 2019 v.26 no.9 pp. 8575-8584
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; arsenic; biochar; birnessite; cadmium; cations; heavy metals; models; moieties; remediation; scanning electron microscopy; soil; sorbents; sorption isotherms
Abstract:
... A novel biochar was prepared by loading birnessite to improve its capability to simultaneously adsorb As(III), As(V), and Cd(II) in water and soil. Layer sheet–structured birnessite was successfully loaded onto the biochar surface with increased functional groups. SEM, XRD, and FTIR combining with XPS analysis were utilized to characterize birnessite-loaded biochar and its adsorption mechanisms fo ...
DOI:
10.1007/s11356-019-04315-x

20. Sources and distribution of arsenic in agricultural soils of Central Mexico

Author:
Gabriela A. Zanor; María Gabriela García; Luis Eduardo Venegas-Aguilera; Adriana Saldaña-Robles; Noé Saldaña-Robles; Oscar A. Martínez-Jaime; José Jesús N. Segoviano-Garfias; Luis F. Ramírez-Santoyo
Source:
Journal of soils and sediments 2019 v.19 no.6 pp. 2795-2808
ISSN:
1439-0108
Subject:
Entisols; Vertisols; X-radiation; X-ray diffraction; adsorption; agricultural soils; anions; arable soils; arsenic; atomic absorption spectrometry; cations; clay; coatings; energy-dispersive X-ray analysis; feldspar; groundwater; high performance liquid chromatography; irrigation; magnetite; organic matter; risk; rivers; scanning electron microscopy; soil quality; watersheds; Mexico
Abstract:
... PURPOSE: The concentrations and distribution of arsenic (As) in two different soil types (Vertisols and Entisols) of Central Mexico impacted by mine activities and irrigation with As-rich groundwater are analyzed in order to determine their impact on the soil quality, and to contribute reliable data that may help to assess the environmental risk that represents the progressive accumulation of As i ...
DOI:
10.1007/s11368-019-02269-8

21. Structural Factors Determining Thermal Stability Limits of Ionic Liquid/MOF Composites: Imidazolium Ionic Liquids Combined with CuBTC and ZIF-8

Author:
Muhammad Zeeshan; Vahid Nozari; Seda Keskin; Alper Uzun
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.31 pp. 14124-14138
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acetates; anions; cations; coordination polymers; density functional theory; guidelines; imidazoles; ionic liquids; methylation; moieties; phosphates; process design; quantitative structure-activity relationships; scanning electron microscopy; temperature; thermal stability; thermogravimetry
Abstract:
... Twenty-nine different imidazolium ionic liquids (ILs) were combined with two different metal–organic frameworks (MOFs), ZIF-8 and CuBTC, and the resulting IL/MOF composites were characterized in detail by combining X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), and Fourier transform infrared (FTIR) spectroscopy. Characterization data illustrated that MOF ...
DOI:
10.1021/acs.iecr.9b02415

22. Structure and Properties of Cs₇(H₄PO₄)(H₂PO₄)₈: A New Superprotonic Solid Acid Featuring the Unusual Polycation (H₄PO₄)⁺

Author:
Louis S. Wang; Sawankumar V. Patel; Sheel S. Sanghvi; Yan-Yan Hu; Sossina M. Haile
Source:
Journal of the American Chemical Society 2020 v.142 no.47 pp. 19992-20001
ISSN:
1520-5126
Subject:
X-ray diffraction; anions; cations; humidification; moieties; nuclear magnetic resonance spectroscopy; temperature; thermodynamics
Abstract:
... We report the discovery of a new superprotonic compound, Cs₇(H₄PO₄)(H₂PO₄)₈, or CPP, which forms at elevated temperatures from the reaction of CsH₂PO₄ and CsH₅(PO₄)₂. The structure, solved using high-temperature single-crystal X-ray diffraction and confirmed by high-temperature ³¹P NMR spectroscopy, crystallizes in space group Pm3̅n and has a lattice constant of 20.1994(9) Å at 130 °C. The unit ce ...
DOI:
10.1021/jacs.0c08870

23. Synthesis and characterization of a high-quality nanocontainer based on benzimidazole-zinc phosphate (ZP-BIM) tailored graphene oxides; a facile approach to fabricating a smart self-healing anti-corrosion system

Author:
Sina Asaldoust; Bahram Ramezanzadeh
Source:
Journal of colloid and interface science 2020 v.564 pp. 230-244
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; cations; coatings; corrosion; electrochemistry; energy-dispersive X-ray analysis; epoxides; graphene; graphene oxide; nanocarriers; phosphates; scanning electron microscopy; sodium chloride; steel; zinc
Abstract:
... This paper describes the synthesis of a novel corrosion inhibitor nanocarrier based on benzimidazole-zinc phosphate (ZP-BIM) tailored graphene oxide (GO) and its application in the epoxy-based composite coating for the achievement of smart self-healing anti-corrosion properties toward mild steel (MS) against saline solution. The morphology and chemical/phase composition of the GO-ZP-BIM particles ...
DOI:
10.1016/j.jcis.2019.12.122

24. Tailored CO₂-Philic Anionic Poly(ionic liquid) Composite Membranes: Synthesis, Characterization, and Gas Transport Properties

Author:
Irshad Kammakakam; Jason E. Bara; Enrique M. Jackson; Josu Lertxundi; David Mecerreyes; Liliana C. Tomé
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.15 pp. 5954-5965
ISSN:
2168-0485
Subject:
X-ray diffraction; anions; asymmetric membranes; carbon dioxide; cations; differential scanning calorimetry; flue gas; hydrogen; imidazoles; ionic liquids; methane; natural gas; nitrogen; permeability; photochemical reactions; polymerization; polymers; solubility; structure-activity relationships; synthesis gas; thermogravimetry
Abstract:
... Polymeric membranes either containing, or built from, ionic liquids (ILs) are of great interest for enhanced CO₂/light gas separation due to the stronger affinity of ILs toward quadrupolar CO₂ molecules and hence high CO₂ solubility selectivity. Herein, we report the development of a series of four novel anionic poly(IL)-IL composite membranes via a photopolymerization method for effective CO₂ sep ...
DOI:
10.1021/acssuschemeng.0c00327

25. The role of polysulfide dianions and radical anions in the chemical, physical and biological sciences, including sulfur-based batteries

Author:
Ralf Steudel; Tristram Chivers
Source:
Chemical Society reviews 2019 v.48 no.12 pp. 3279-3319
ISSN:
1460-4744
Subject:
Biological Sciences; Raman spectroscopy; X-ray absorption spectroscopy; X-ray diffraction; anions; batteries; cations; chromatography; dissociation; electrochemistry; mass spectrometry; nuclear magnetic resonance spectroscopy; quantum mechanics; salts; sulfur
Abstract:
... The well-known tendency of sulfur to catenate is exemplified by an extensive series of polysulfide dianions [Sₙ]²⁻ (n = 2–9) and related radical monoanions [Sₙ]˙⁻. The dianions can be isolated as crystalline salts with appropriate cations and structurally and spectroscopically characterized. Although the smaller radical monoanions may be stabilized in zeolitic matrices, they are usually formed in ...
DOI:
10.1039/c8cs00826d

26. Ultrahigh Ion-Selective and Durable Nafion-NdZr Composite Layer Membranes for All-Vanadium Redox Flow Batteries

Author:
Syed Imdadul Hossain; Md. Abdul Aziz; Sangaraju Shanmugam
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.4 pp. 1998-2007
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; anions; asymmetric membranes; atomic force microscopy; batteries; cations; chlorides; durability; nanotubes; quaternary ammonium compounds; scanning electron microscopy; sodium; styrene; sulfonates; thermal stability; transmission electron microscopy; vanadium; zirconium oxide
Abstract:
... A thin Nafion-neodymium zirconium oxide nanotube (NdZr) composite (Nafion-NdZr) membrane has been fabricated and further modified by the polycation, poly(diallyldimethylammonium chloride) (PDDA), and polyanion, poly(sodium styrene sulfonate) (PSS). The ion selectivity of the Nafion-NdZr (1%)/[P-S]₂ composite layer membrane was found to be 6.9, 3.5, and 2.3 times higher than those of recast Nafion, ...
DOI:
10.1021/acssuschemeng.9b06541

27. Antibacterial oxidized starch/ZnO nanocomposite hydrogel: Synthesis and evaluation of its swelling behaviours in various pHs and salt solutions

Author:
Hassan Namazi; Mohsen Hasani; Mehdi Yadollahi
Source:
International journal of biological macromolecules 2019 v.126 pp. 578-584
ISSN:
0141-8130
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; Staphylococcus aureus; X-ray diffraction; aluminum chloride; anions; antibacterial properties; aqueous solutions; calcium chloride; cations; hydrogels; nanocomposites; nanoparticles; oxidation; pH; salt concentration; scanning electron microscopy; sodium chloride; starch; swelling (materials); zinc oxide
Abstract:
... In this study, oxidized starch hydrogels have been fabricated, and then ZnO nanoparticles were added to swollen oxidized starch hydrogels through the in-situ process. The purpose of this work was to study the effect of ZnO nanoparticles on swelling behavior of oxidized starch hydrogels, as well as investigation their potential to be used in the antibacterial applications. The obtained results show ...
DOI:
10.1016/j.ijbiomac.2018.12.242

28. Die monoklinen Seltenerdmetall(III)-Chlorid-Oxidoarsenate(III) mit der Zusammensetzung SE₅Cl₃[AsO₃]₄ (SE=La–Nd, Sm)

Author:
Felix C. Goerigk; Svetlana Schander; Makram Ben Hamida; Dong-Hee Kang; Florian Ledderboge; Mathias S. Wickleder; Thomas Schleid
Source:
Zeitschrift für Naturforschung 2019 v.74 no.6 pp. 497-506
ISSN:
1865-7117
Subject:
anions; arsenic; arsenic oxide; cations; ceric oxide; crystal structure; glass; oxygen; prisms; silica
Abstract:
... The rare earth metal(III) chloride oxidoarsenates(III) with the composition RE₅Cl₃[AsO₃]₄ (RE = La–Nd, Sm) could be synthesized via solid-state methods through the reaction of arsenic sesquioxide (As₂O₃) with the corresponding rare earth metal compounds (La₂O₃, CeO₂ + metallic Ce, Pr₆O₁₁, Nd₂O₃ or metallic Sm) using several chloride-containing fluxing agents in evacuated silica glass ampoules. The ...
DOI:
10.1515/znb-2019-0019

29. Dispersive solid-phase extraction with tannic acid functionalized graphene adsorbent for the preconcentration of trace beryllium from water and street dust samples

Author:
Emre Yavuz; Şerife Tokalıoğlu; Şaban Patat
Source:
Talanta 2018 v.190 pp. 397-402
ISSN:
0039-9140
Subject:
X-ray diffraction; adsorbents; adsorption; anions; atomic absorption spectrometry; beryllium; cations; detection limit; dust; graphene; hydrochloric acid; lakes; pH; scanning electron microscopy; solid phase extraction; tannins; tap water; wastewater
Abstract:
... In this study, tannic acid functionalized graphene as an adsorbent was synthesized and characterized by X-ray diffraction and scanning electron microscopy. It was used for the first time as an adsorbent for vortex-assisted dispersive solid phase extraction of trace Be(II) from water and street dust samples. The determination of beryllium was made by graphite furnace atomic absorption spectrometry. ...
DOI:
10.1016/j.talanta.2018.08.001

30. Enhanced catalytic performance for VOCs oxidation on the CoAlO oxides by KMnO4 doped on facile synthesis

Author:
Qian Zhao; Qingling Liu; Chunfeng Song; Na Ji; Degang Ma; Xuebin Lu
Source:
Chemosphere 2019 v.218 pp. 895-906
ISSN:
0045-6535
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; acetone; air; anions; carbonates; catalysts; catalytic activity; cations; chlorides; coal; cobalt; ethyl acetate; industrial applications; manganese; manganese oxides; nitrates; oxidation; oxygen; potassium permanganate; sulfates; volatile organic compounds; water vapor
Abstract:
... The MnOₓ was immobilized on the CoAl mixed oxides (CoAlO) derived from hydrotalcites with various anions (CO₃²⁻, Cl⁻, NO₃⁻ and SO₄²⁻) using the hydration and impregnation methods. The CoAlO oxides modified by KMnO₄ were calcined in air at 300 °C to obtain stable oxides, which could be used as catalysts for VOCs (acetone and ethyl acetate) oxidation. CoAlO with CO₃²⁻ and 30 h of hydration time (CoA ...
DOI:
10.1016/j.chemosphere.2018.11.131

31. Ferroelectric properties and Raman spectroscopy of the [(C₄H₉)₄N]₃Bi₂Cl₉ compound

Author:
W. Trigui; F. Hlel
Source:
RSC advances 2019 v.9 no.42 pp. 24291-24298
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; activation energy; ambient temperature; anions; cations; crystallization; dielectric properties; information technology; models
Abstract:
... The exploration of ferroelectric hybrid materials is highly appealing due to their great technological significance. They have the potential to conserve power and amazing applications in information technology. In line with this, we herein report the development of a [(C₄H₉)₄N]₃Bi₂Cl₉ tetra-alkyl hybrid compound that exhibits ferroelectric properties. The phase purity was confirmed by Rietveld ref ...
DOI:
10.1039/c9ra02577d

32. Low-Temperature Phase Transitions of the Ionic Liquid 1-Ethyl-3-methylimidazolium Dicyanamide

Author:
Kalil Bernardino; Thamires A. Lima; Mauro C. C. Ribeiro
Source:
Journal of physical chemistry 2019 v.123 no.44 pp. 9418-9427
ISSN:
1520-5207
Subject:
Gibbs free energy; Raman spectroscopy; X-ray diffraction; ambient temperature; anions; calorimetry; cations; chemical structure; cooling; crystallization; density functional theory; glass; imidazoles; ionic liquids; liquids; melting; models; molecular dynamics
Abstract:
... Several calorimetric measurements have shown that 1-ethyl-3-methylimidazolium dicyanamide, [C₂C₁im][N(CN)₂], is a glass-forming liquid, even though it is a low-viscous liquid at room temperature. Here, we found slow crystallization during cooling of [C₂C₁im][N(CN)₂] along Raman spectroscopy measurements. The low-frequency range of the Raman spectrum shows that the same crystalline phase is obtaine ...
DOI:
10.1021/acs.jpcb.9b07654

33. Modification of zeolite 4A for use as an adsorbent for glyphosate and as an antibacterial agent for water

Author:
Siamak Zavareh; Zahra Farrokhzad; Farshad Darvishi
Source:
Ecotoxicology and environmental safety 2018 v.155 pp. 1-8
ISSN:
0147-6513
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; anions; antibacterial properties; antibiotics; aqueous solutions; bacteria; cations; chemical structure; copper; disinfection; filters; glyphosate; models; pH; scanning electron microscopy; sorption isotherms; zeolites
Abstract:
... The aim of this work was to design a low cost adsorbent for efficient and selective removal of glyphosate from water at neutral pH conditions. For this purpose, zeolite 4A, a locally abundant and cheap mineral material, was ion-exchanged with Cu²⁺ to produce Cu-zeolite 4A. The FTIR results revealed that the modification has no important effect on chemical structure of zeolite 4A. After modificatio ...
DOI:
10.1016/j.ecoenv.2018.02.043

34. Modulation of σ-Alkane Interactions in [Rh(L₂)(alkane)]⁺ Solid-State Molecular Organometallic (SMOM) Systems by Variation of the Chelating Phosphine and Alkane: Access to η²,η²-σ-Alkane Rh(I), η¹-σ-Alkane Rh(III) Complexes, and Alkane Encapsulation

Author:
Antonio J. Martínez-Martínez; Bengt E. Tegner; Alasdair I. McKay; Alexander J. Bukvic; Nicholas H. Rees; Graham J. Tizzard; Simon J. Coles; Mark R. Warren; Stuart A. Macgregor; Andrew S. Weller
Source:
Journal of the American Chemical Society 2018 v.140 no.44 pp. 14958-14970
ISSN:
1520-5126
Subject:
X-ray diffraction; alkanes; anions; carbon-hydrogen bond activation; cations; encapsulation; hydrogenation; ligands; methylene chloride; moieties; nuclear magnetic resonance spectroscopy; phosphine; temperature
Abstract:
... Solid/gas single-crystal to single-crystal (SC–SC) hydrogenation of appropriate diene precursors forms the corresponding σ-alkane complexes [Rh(Cy₂P(CH₂)ₙPCy₂)(L)][BArF₄] (n = 3, 4) and [RhH(Cy₂P(CH₂)₂(CH)(CH₂)₂PCy₂)(L)][BArF₄] (n = 5, L = norbornane, NBA; cyclooctane, COA). Their structures, as determined by single-crystal X-ray diffraction, have cations exhibiting Rh···H–C σ-interactions which a ...
DOI:
10.1021/jacs.8b09364

35. Pervaporation multilayer membranes based on a polyelectrolyte complex of λ-carrageenan and chitosan

Author:
Svetlana V. Kononova; Aleksandra V. Volod’ko; Valentina A. Petrova; Elena V. Kruchinina; Yulia G. Baklagina; Evgeniy A. Chusovitin; Yury A. Skorik
Source:
Carbohydrate polymers 2018 v.181 pp. 86-92
ISSN:
0144-8617
Subject:
Chondrus; X-ray diffraction; algae; anions; atomic force microscopy; cations; chitosan; ethanol; lambda-carrageenan; pervaporation
Abstract:
... A polyelectrolyte complex (PEC) was prepared from chitosan (CS) and λ-carrageenan (λ-CAR) using a layer-by-layer deposition of polyion solutions on a plated nonporous support. This material was then used as a multilayer membrane for the pervaporation separation of aqueous ethanol solutions. The fabricated complex film (25–30μm thick) was a multilayer system (λ-CAR-PEC-CS) containing a polycation C ...
DOI:
10.1016/j.carbpol.2017.10.050

36. Preparation and characterization of adsorbents derived from bentonite and kaolin clays

Author:
Friday Onyekwere Nwosu; Oluwaseun Jacob Ajala; Rukayat Motunrayo Owoyemi; Bukola Ganiyat Raheem
Source:
Applied water science 2018 v.8 no.7 pp. 195
ISSN:
2190-5487
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; anions; bentonite; bulk density; cations; clay; deformation; iodine; kaolin; methylene blue; pH; pollutants; scanning electron microscopy; sodium hydroxide; sulfuric acid; water content
Abstract:
... The comparative study on preparation and characterization of modified bentonite and kaolin clay types is aimed at establishment of the ability of these clay types to adsorb pollutants. Its low cost, availability and recovery of clay give it added advantage of an effective adsorbent. The modified clay types were prepared by impregnation using various concentrations of either H₂SO₄ or NaOH in w/v ra ...
DOI:
10.1007/s13201-018-0827-2

37. Snapshots of the Hydrolysis of Lithium 4,5-Dicyanoimidazolate–Glyme Solvates. Impact of Water Molecules on Aggregation Processes in Lithium-Ion Battery Electrolytes

Author:
Maciej Dranka; Piotr Jankowski; Grażyna Z. Żukowska
Source:
Journal of physical chemistry 2018 v.122 no.6 pp. 3201-3210
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-ray diffraction; air; anions; cations; dissociation; esters; ethers; hydrolysis; liquids; lithium; lithium batteries; melting; nitrogen; oxygen; solvents
Abstract:
... Despite that 4,5-dicyano-2-(trifluoromethyl)imidazole lithium salt (LiTDI) exhibits several interesting features in aprotic solvents such as glymes or carbonate esters, little is known about its structural rearrangement after exposure to water. Since the LiTDI salt has been verified as an effective moisture scavenger able to suppress degradation of the LiPF₆-based electrolyte, comprehensive knowle ...
DOI:
10.1021/acs.jpcc.7b11145

38. Structural changes in lignocellulosic biomass during activation with ionic liquids comprising 3-methylimidazolium cations and carboxylate anions

Author:
Preenaa Moyer; Keonhee Kim; Nourredine Abdoulmoumine; Stephen C. Chmely; Brian K. Long; Danielle Julie Carrier; Nicole Labbé
Source:
Biotechnology for biofuels 2018 v.11 no.1 pp. 265
ISSN:
1754-6834
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acetates; anions; biomass; cations; cellulose; crystal structure; formates; fractionation; fuels; hemicellulose; ionic liquids; lignocellulose; saccharification; scanning electron microscopy; solubility
Abstract:
... BACKGROUND: Lignocellulosic biomass requires either pretreatment and/or fractionation to recover its individual components for further use as intermediate building blocks for producing fuels, chemicals, and products. Numerous ionic liquids (ILs) have been investigated for biomass pretreatment or fractionation due to their ability to activate lignocellulosic biomass, thereby reducing biomass recalc ...
DOI:
10.1186/s13068-018-1263-0
PubMed:
30275905
PubMed Central:
PMC6158905

39. Synthesis, crystal structure, and magnetic properties of a multicage compound: [(Me)₂EtNH][Mn(N₃)₃] with a perovskite-related structure

Author:
Jie Yang; Yuan Huang; Ting Fang; Kun Qian; Wen-Bin Chen; Xiu-Feng Yu; Yi-Chun Ai; Jia-Li Ye; Xiang-Yun Li
Source:
Zeitschrift für Naturforschung 2019 v.74 no.4 pp. 335-339
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; azides; cations; crystal structure; ferrimagnetic materials; infrared spectroscopy; magnetic properties; magnetism; manganese
Abstract:
... A new multicage compound [(Me)₂EtNH][Mn(N₃)₃] (Me = methyl, Et = ethyl) with a perovskite-related structure has been synthesized. The manganese(II) cations are bridged by end-to-end (EE) azide anions to form three-dimensional cages with the N,N-dimethylethylammonium cations residing in the cavities of the [Mn(N₃)₃]ₙⁿ⁻ cages. The compound has been characterized by single-crystal X-ray diffraction, ...
DOI:
10.1515/znb-2018-0183

40. The Role of Specific Ion Effects in Ion Transport: The Case of Nitrate and Thiocyanate

Author:
Kaitlin Lovering; Srikanth Nayak; Wei Bu; Ahmet Uysal
Source:
Journal of physical chemistry 2019 v.124 no.1 pp. 573-581
ISSN:
1932-7455
Subject:
X-ray diffraction; X-ray reflectivity; adsorption; anions; cations; lanthanides; models; nitrates; solvation; solvents; spectroscopy; thiocyanates
Abstract:
... The selective transport of trivalent rare earth metals from aqueous to organic environments with the help of amphiphilic “extractants” is an industrially important process. When the amphiphilic extractant is positively charged or neutral, the coextracted background anions are not only necessary for charge balance but also have a large impact on extraction efficiency and selectivity. In particular, ...
DOI:
10.1021/acs.jpcc.9b09288

41. A series of new polyoxometalate-based metal–organic complexes with different rigid pyridyl-bis(triazole) ligands: assembly, structures and electrochemical properties

Author:
Xiuli Wang; Xue Bai; Hongyan Lin; Junjun Sun; Xiang Wang; Guocheng Liu
Source:
RSC advances 2018 v.8 no.40 pp. 22676-22686
ISSN:
2046-2069
Subject:
X-ray diffraction; anions; ascorbic acid; cations; cobalt; electrochemistry; hydrogen peroxide; ligands; nickel; oxidation; pH; redox potential; thermogravimetry; triazoles
Abstract:
... Five new polyoxometalate (POM)-based metal–organic complexes (MOCs) with different rigid pyridyl-bis(triazole) ligands, namely, H{Co₂(Hpyttz-I)₂(H₂O)₆[CrMo₆(OH)₆O₁₈]}·8H₂O (1), {Co₂(H₂pyttz-I)₂(H₂O)₄[TeMo₆O₂₄]}[Co(H₂O)₆]·3H₂O (2), {Co₃(Hpyttz-II)₂(H₂O)₆[γ-Mo₈O₂₆]}·10H₂O (3), {Ni₃(Hpyttz-II)₂(H₂O)₆[γ-Mo₈O₂₆]}·10H₂O (4), {Ni₃(Hpyttz-III)₂(H₂O)₈[γ-Mo₈O₂₆]}·10H₂O (5) (H₂pyttz-I = 3-(pyrid-2-yl)-5-(1H- ...
DOI:
10.1039/c8ra03277g

42. A simple and efficient protocol to develop durable multifunctional property to cellulosic materials using in situ generated nano-ZnO

Author:
A. Arputharaj; Vigneshwaran Nadanathangam; Sanjeev R. Shukla
Source:
Cellulose 2017 v.24 no.8 pp. 3399-3410
ISSN:
0969-0239
Subject:
Fourier transform infrared spectroscopy; Klebsiella pneumoniae; Staphylococcus aureus; X-ray diffraction; anions; antibacterial properties; cations; cellulose; cellulose fibrils; chemical elements; cotton fabric; durability; mechanical properties; nitrates; pathogens; scanning electron microscopy; sodium hydroxide; transmission electron microscopy; zinc oxide
Abstract:
... This article focuses on the development of a durable multi-functional finish for cotton fabric by direct synthesis of nano zinc oxide (nano-ZnO) particles in the pores of the fibres. Anions and cations of zinc nitrate interacted with cellulose molecules and opened up the internal pore structure of cellulosic fibrils that in turn acted as nucleating sites for the formation of nano-ZnO on reaction w ...
DOI:
10.1007/s10570-017-1335-5

43. Alumina/nano-graphite composite as a new nanosorbent for the selective adsorption, preconcentration, and determination of chromium in water samples by EDXRF

Author:
Anna Baranik; Rafal Sitko; Anna Gagor; Beata Zawisza
Source:
Analytical and bioanalytical chemistry 2018 v.410 no.29 pp. 7793-7802
ISSN:
1618-2642
Subject:
Raman spectroscopy; X-ray diffraction; X-ray fluorescence spectroscopy; adsorption; aluminum; aluminum oxide; anions; cations; chromium; detection limit; energy-dispersive X-ray analysis; filters; humic acids; nanocomposites; pH; scanning electron microscopy; sorbents; standard deviation; ultrasonic treatment
Abstract:
... Obtaining new nanocomposites with sorption properties towards chromium is highly important not only from the environmental point of view but also for developing eco-friendly methods of chromium determination. The potential use of aluminum oxide-coated nano-graphite (Al₂O₃/nano-G) as a new nanosorbent in ultrasound-assisted dispersive micro-solid-phase extraction (DMSPE) for rapid speciation of tra ...
DOI:
10.1007/s00216-018-1397-8
PubMed:
30291387
PubMed Central:
PMC6244755

44. Anion Adsorption, Ti₃C₂Tz MXene Multilayers, and Their Effect on Claylike Swelling

Author:
Cooper A. Voigt; Michael Ghidiu; Varun Natu; Michel W. Barsoum
Source:
Journal of physical chemistry 2018 v.122 no.40 pp. 23172-23179
ISSN:
1932-7455
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; carbides; cations; chemical analysis; energy-dispersive X-ray analysis; phosphoric acid; powders; washing
Abstract:
... MXenes are a relatively new and large family of two-dimensional early transition-metal carbides derived typically by etching the MAX phases in fluoride-containing solutions. Although numerous studies have investigated the role of cations in the interlayer distance (d₀₀₀₂) between MXene multilayers (MLs), little is known about the role of anions. Herein, using mainly X-ray diffraction, the effect o ...
DOI:
10.1021/acs.jpcc.8b07447

45. Antioxidant intercalated hydrocalumite as multifunction nanofiller for Poly(propylene): Synthesis, thermal stability, light stability, and anti-migration property

Author:
Qian Zhang; Qian Jiao; Fabrice Leroux; Pinggui Tang; Dianqing Li; Yongjun Feng
Source:
Polymer Degradation and Stability 2017 v.140 pp. 9-16
ISSN:
0141-3910
Subject:
2,2-diphenyl-1-picrylhydrazyl; Fourier transform infrared spectroscopy; X-ray diffraction; anions; antioxidant activity; antioxidants; calcium; cations; coprecipitation; hydroxides; oxidation; photostability; polypropylenes; propylene; thermal stability
Abstract:
... One of the major issues for poly(propylene) PP concerns its protection towards oxidative phenomena resulting in polymer failure. Using known anti-oxidant (AO), Irganox 1425, an original approach is taking advantage of the counterion, cations Ca2+, in building hydrocalumite inorganic sheets, and concomitantly providing the AO anions to be immobilized within an inorganic host structure. Through the ...
DOI:
10.1016/j.polymdegradstab.2017.04.012

46. Benzimidazolium salt-based solid-state electrolytes afford efficient quantum-dot sensitized solar cells

Author:
Ruijuan Dang; Yefeng Wang; Jinghui Zeng; Zhangjun Huang; Zhaofu Fei; Paul J. Dyson
Source:
Journal of materials chemistry A 2017 v.5 no.26 pp. 13526-13534
ISSN:
2050-7496
Subject:
X-ray diffraction; anions; bromides; cations; dielectric spectroscopy; differential scanning calorimetry; phase transition; quantum dots; solar cells; thermal stability; thermogravimetry; thiocyanates
Abstract:
... A novel solid-state electrolyte based on 1,3-dihexylbenzimidazolium ([DHexBIm]) cations combined with Br⁻, BF₄⁻ or SCN⁻ anions is used in CdS/CdSe sensitized quantum dot sensitized solar cells (QDSSCs). A power conversion efficiency of 4.26% was achieved with a fill factor of 56.44% using the [DHexBIm][SCN]-based electrolyte. X-ray powder diffraction analysis reveals that [DHexBIm][SCN] is crystal ...
DOI:
10.1039/c7ta02925j

47. B–N–B Bond Embedded Phenalenyl and Its Anions

Author:
Haipeng Wei; Yulan Liu; Tullimilli Y. Gopalakrishna; Hoa Phan; Xiaobo Huang; Lipiao Bao; Jing Guo; Jun Zhou; Shenglian Luo; Jishan Wu; Zebing Zeng
Source:
Journal of the American Chemical Society 2017 v.139 no.44 pp. 15760-15767
ISSN:
1520-5126
Subject:
X-radiation; X-ray diffraction; anions; cations; chemical bonding; chemical reduction; mixing; moieties; polycyclic aromatic hydrocarbons; potassium
Abstract:
... Despite the great potential of heteroatom-containing polycyclic aromatic hydrocarbons in organic optoelectronics, there are very limited reports on heteroaromatics containing a B–N–B bond in the π-scaffold. Herein, stable 1,9-dibora-9a-azaphenalenyl (DBAP) derivatives, named BNB-embedded phenalenyls, are presented. The DBAP skeleton contains a three-center two-π-electron B–N–B moiety with 12 π-ele ...
DOI:
10.1021/jacs.7b07375

48. Crystal structure and theoretical investigation of bis(cis-1,2-diaminocyclohexane)zinc(II) tetrachloridozincate(II)

Author:
Muhammad Akhtar; Wiktor Zierkiewicz; Mariusz Michalczyk; Tobias Rüffer; Heinrich Lang; Anvarhusein A. Isab; Muhammad Mazhar; Saeed Ahmad
Source:
Zeitschrift für Naturforschung 2017 v.72 no.8 pp. 627-630
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; cations; crystal structure; geometry; hydrogen bonding; models; zinc
Abstract:
... A zinc(II) complex of cis-1,2-diaminocyclohexane (Dach), [Zn(Dach)₂][ZnCl₄] (1), was prepared and its structure was determined by X-ray crystallography. Theoretical (density functional theory) studies were performed for the two model compounds, [Zn(Dach)₂][ZnCl₄] (1) and {[Zn(Dach)₂][ZnCl₄]}₃ (1₃). The structure of complex 1 is composed of [Zn(Dach)₂]²⁺ cations and [ZnCl₄]²⁻ anions. The Zn1 atom i ...
DOI:
10.1515/znb-2017-0006

49. Design of Thermophysical Properties of Semiclathrate Hydrates Formed by Tetra-n-butylammonium Hydroxybutyrate

Author:
Sanehiro Muromachi; Satoshi Takeya
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.8 pp. 3059-3064
ISSN:
1520-5045
Subject:
3-hydroxybutyric acid; X-ray diffraction; anions; aqueous solutions; butyrates; cations; crystal structure; differential scanning calorimetry; energy; heat; hydrophilicity; melting point; process design; quaternary ammonium compounds; salts
Abstract:
... Semiclathrate hydrates form from aqueous solution of ionic guest substance such as tetra-n-butylammonium (TBA) and tetra-n-butylphosphonium (TBP) salts. Thermophysical properties of these materials are varied by the ionic guest cations and anions. Investigation of the modification of the semiclathrate hydrates by ionic guest substances is needed to design and improve properties of semiclathrate hy ...
DOI:
10.1021/acs.iecr.7b05028

50. Efficient and Selective Uptake of TcO4– by a Cationic Metal–Organic Framework Material with Open Ag+ Sites

Author:
Sheng Daopeng; Zhu Lin; Xu Chao; Xiao Chengliang; Wang Yanlong; Wang Yaxing; Chen Lanhua; Diwu Juan; Chen Jing; Chai Zhifang; Albrecht-Schmitt Thomas E.; Wang Shuao
Source:
Environmental Science & Technology 2017 v.51 no.6 pp. 3471-3479
ISSN:
1520-5851
Subject:
X-ray diffraction; anion exchange; anions; aqueous solutions; cations; crystal structure; half life; hydrogen bonding; ligands; nitrates; nuclear fuels; pH; radiation resistance; radioactive waste; radionuclides; silver; sorbents; sorption; streams
Abstract:
... ⁹⁹Tc is one of the most problematic radioisotopes in used nuclear fuel owing to its combined features of high fission yield, long half-life, and high environmental mobility. There are only a handful of functional materials that can remove TcO₄– anion from aqueous solution and identifying for new, stable materials with high anion-exchange capacities, fast kinetics, and good selectivity remains a ch ...
DOI:
10.1021/acs.est.7b00339

51. Efficient removal and environmentally benign detoxification of Cr(VI) in aqueous solutions by Zr(IV) cross-linking chitosan magnetic microspheres

Author:
Xiumei Chen; Wengang Zhang; Xueli Luo; Fan Zhao; Yixuan Li; Ronghua Li; Zhonghong Li
Source:
Chemosphere 2017 v.185 pp. 991-1000
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; World Health Organization; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; aqueous solutions; calcium; carbonates; cations; chitosan; chlorides; chromium; copper; crosslinking; drinking water; magnesium; magnetite; nitrates; pH; potassium; scanning electron microscopy; sodium; sulfates; water purification; zinc; zirconium
Abstract:
... Zirconium(IV) cross-linking chitosan (CTS) magnetic microspheres (Fe3O4@Zr-CTS) as a recoverable adsorbent were synthesized through the coordination reaction between zirconium oxychloride and CTS biopolymeric matrix for efficient adsorption and simultaneous detoxification of hexavalent chromium, Cr(VI), in aqueous solutions. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) confirmed ...
DOI:
10.1016/j.chemosphere.2017.07.113

52. Enhanced Cr(VI) removal from acidic solutions using biochar modified by Fe3O4@SiO2-NH2 particles

Author:
Shunquan Shi; Jiakuan Yang; Sha Liang; Mingyang Li; Quan Gan; Keke Xiao; Jingping Hu
Source:
Science of the total environment 2018 v.628-629 pp. 499-508
ISSN:
0048-9697
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; biochar; carboxylation; cations; chelation; chemical bonding; chromium; iron; magnetic properties; magnetism; recycling; trees; wastewater
Abstract:
... Fe₃O₄@SiO₂-NH₂ magnetic particles with core-shell structure were attached on carboxylated biochar derived from phoenix tree leaves to synthesize a novel magnetic biochar for removing Cr(VI) ions from acidic solutions. FSEM, FTEM, XRD characterizations of the synthesized magnetic biochar revealed that the Fe₃O₄@SiO₂-NH₂ magnetic particles distributed uniformly on the surface or macrospores of carbo ...
DOI:
10.1016/j.scitotenv.2018.02.091

53. Enhancing the Catalytic Performance of Candida antarctica Lipase B by Immobilization onto the Ionic Liquids Modified SBA‐15

Author:
Nanjing Zhong; Yue Li; Chunsheng Cai; Yongqing Gao; Ning Liu; Guoqin Liu; Wenying Tan; Yaoying Zeng
Source:
European journal of lipid science and technology 2018 v.120 no.4 pp. e1700357
ISSN:
1438-7697
Subject:
Fourier transform infrared spectroscopy; Pseudozyma antarctica; X-ray diffraction; X-ray photoelectron spectroscopy; anions; carboxylic ester hydrolases; catalytic activity; cations; corn oil; diacylglycerols; enzyme activity; ionic liquids; porous media; silica; triacylglycerols
Abstract:
... In this study, mesoporous silica SBA‐15 is modified by imidazole based ionic liquids (IL) with three different side‐chain length of cations and two different anions. Prepared supports (IL‐SBA‐15) are characterized by small‐angle powder X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS) as well as Fourier transform infrared (FT‐IR), and then used to immobilize Candida antarctica lipase ...
DOI:
10.1002/ejlt.201700357

54. Hydrogen Bonding Features in Cholinium-Based Protic Ionic Liquids from Molecular Dynamics Simulations

Author:
Marco Campetella; Andrea Le Donne; Maddalena Daniele; Lorenzo Gontrani; Stefano Lupi; Enrico Bodo; Francesca Leonelli
Source:
Journal of physical chemistry 2018 v.122 no.9 pp. 2635-2645
ISSN:
1520-5207
Subject:
X-ray diffraction; amino acids; anions; branching; cations; choline; hydrogen bonding; ionic liquids; moieties; molecular dynamics; simulation models
Abstract:
... We explore the structure of a series of protic Ionic Liquids based on the choline cation and amino acid anions. In the series, the length and the branching of the amino acid alkyl chain varies. Ab initio molecular dynamics, X-ray diffraction measurements, and infrared spectra have been used to provide a reliable picture of the short-range structure and of the short-time dynamic process that charac ...
DOI:
10.1021/acs.jpcb.7b12455

55. Molecular dynamics and the translational–rotational coupling of an ionically conducting glass-former: amlodipine besylate

Author:
Safna Hussan K. P; Mohamed Shahin Thayyil; S. K. Deshpande; Jinitha T. V; Manoj K; K. L. Ngai
Source:
RSC advances 2018 v.8 no.37 pp. 20630-20636
ISSN:
2046-2069
Subject:
X-ray diffraction; anions; cations; chemical structure; density functional theory; dielectric spectroscopy; differential scanning calorimetry; glass transition temperature; models; molecular dynamics; quantum mechanics
Abstract:
... We studied the conductivity relaxation originating from a glass-former composed of cations and anions, and the relation to the structural α-relaxation at temperatures above and below the glass transition temperature. The material chosen was amorphous amlodipine besylate (AMB), which is also a pharmaceutical with a complex chemical structure. Measurements were made using differential scanning calor ...
DOI:
10.1039/c8ra01544a

56. Nanocomposite thin films Ag0(NP)/TiO2 in the efficient removal of micro-pollutants from aqueous solutions: A case study of tetracycline and sulfamethoxazole removal

Author:
Alka Tiwari; Alok Shukla; Lalliansanga; Diwakar Tiwari; Seung Mok Lee
Source:
Journal of environmental management 2018 v.220 pp. 96-108
ISSN:
0301-4797
Subject:
EDTA (chelating agent); X-ray diffraction; anions; aqueous solutions; case studies; cations; energy-dispersive X-ray analysis; free radicals; hydroxyl radicals; isopropyl alcohol; mineralization; moieties; nanocomposites; nanosilver; organic carbon; pH; photocatalysis; photocatalysts; pollutants; scanning electron microscopy; semiconductors; silver; sodium azide; sulfamethoxazole; surface area; surface roughness; tetracycline; titanium dioxide; transmission electron microscopy; ultraviolet radiation
Abstract:
... The aim of this communication is to synthesize novel Nanocomposite thin film materials (Ag0(NP)/TiO2) using the template process. Surface morphology of materials was obtained by the Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) analyses. The presence of doped Ag-nanoparticles was confirmed by the TEM images along with the SEM-EDX analyses. The Atomic Force Microscop ...
DOI:
10.1016/j.jenvman.2018.05.019

57. Photochromic behavior of a new polyoxomolybdate/alkylamine composite in solid state

Author:
Jingkun Lu; Xin Zhang; Pengtao Ma; Vikram Singh; Chao Zhang; Jingyang Niu; Jingping Wang
Source:
Journal of materials science 2018 v.53 no.4 pp. 3078-3086
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; anions; aqueous solutions; cations; color; irradiation; molybdenum; temperature; xenon
Abstract:
... A new polyoxomolybdate/alkylamine composite (C₃N₂H₅)₆[As₄Mo₈O₃₃]·4H₂O [1] was successfully synthesized by controlling the reaction parameters in the conventional aqueous solution. Compound 1 was well characterized by single-crystal X-ray diffraction, FTIR, XPRD analysis, TGA and elemental analyses. It was found that compound 1 exhibited intriguing photochromic behavior along with interesting therm ...
DOI:
10.1007/s10853-017-1736-8

58. Probing the Formation, Structure, and Reactivity of Zn(II), Ag(I), and Fe(II) Complexes with 2,2′:6′,2″-Terpyridine on Ag Nanoparticles Surfaces by Time Evolution of SERS Spectra, Factor Analysis, and DFT Calculations

Author:
Ivana Šloufová; Blanka Vlčková; Peter Mojzeš; Irena Matulková; Ivana Císařová; Marek Procházka; Jiří Vohlídal
Source:
Journal of physical chemistry 2018 v.122 no.11 pp. 6066-6077
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-ray diffraction; adsorption; anions; cations; chlorides; density functional theory; factor analysis; iron; ligands; nanosilver; silver; zinc
Abstract:
... The adsorption and surface reactivity of 2,2′:6′,2″-terpyridine (tpy) and its metal (M = Zn²⁺, Fe²⁺, Ag⁺) complexes on Ag nanoparticle surfaces together with the structure of the resulting MₛX⁺-tpy surface species and the mechanism of their formation have been investigated. The process was elucidated by time-dependent surface-enhanced Raman scattering (SERS) spectra, their treatment by factor anal ...
DOI:
10.1021/acs.jpcc.7b12157

59. Salt efflorescence as indicator for sources of damaging salts on historic buildings and monuments: a statistical approach

Author:
Heiner Siedel
Source:
Environmental earth sciences 2018 v.77 no.16 pp. 572
ISSN:
1866-6280
Subject:
X-ray diffraction; air pollution; alkalis; anions; buildings; carbonates; cations; chemical analysis; chlorides; gypsum; historic sites; monuments; sodium nitrate; statistical analysis; sulfates; Germany
Abstract:
... The results of XRD analyses of salt types found in more than 300 samples of efflorescence on buildings and monuments in Saxony (Germany) have been statistically evaluated. The major salt types are gypsum, magnesium sulphates, and sodium sulphates. The frequency of other alkali sulphates as well as of alkali carbonates, which are normally not detected in routine chemical analyses, is also remarkabl ...
DOI:
10.1007/s12665-018-7752-4

60. Simultaneous removal of Cu(II) and Cr(VI) by Mg–Al–Cl layered double hydroxide and mechanism insight

Author:
Xianyang Yue; Weizhen Liu; Zuliang Chen; Zhang Lin
Source:
Journal of environmental sciences (China) 2017 v.53 pp. 16-26
ISSN:
1001-0742
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aluminum; anion exchange; anions; aqueous solutions; cations; chlorides; chromium; copper; heavy metals; magnesium; pH; transmission electron microscopy; wastewater
Abstract:
... Mg–Al–Cl layered double hydroxide (Cl-LDH) was prepared to simultaneously remove Cu(II) and Cr(VI) from aqueous solution. The coexisting Cu(II) (20mg/L) and Cr(VI) (40mg/L) were completely removed within 30min by Cl-LDH in a dosage of 2.0g/L; the removal rate of Cu(II) was accelerated in the presence of Cr(VI). Moreover, compared with the adsorption of single Cu(II) or Cr(VI), the adsorption capac ...
DOI:
10.1016/j.jes.2016.01.015

61. Synthesis, crystal structure, and magnetic properties of the complex [(CH₃)₃NH]₂ [Co(NCS)₄]

Author:
Yang Jie; Huang Yuan; Zhong YouQuan; Fang Ting; Hao Fan; Kun Qian; Yao-Hui Ye
Source:
Zeitschrift für Naturforschung 2018 v.73 no.8 pp. 571-575
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; cations; crystal structure; infrared spectroscopy; magnetic properties; magnetism
Abstract:
... A new complex [(CH₃)₃NH]₂[Co(NCS)₄], in which zero-dimensional [Co(NCS)₄]ₙ²⁻ anions are balanced by 2n [(CH₃)₃NH]⁺ cations, was synthesized. The complex has been characterized by single X-ray diffraction, infrared spectroscopy, elemental analysis, and magnetic measurements. Magnetic susceptibility data indicate ferromagnetic interactions among the Coᴵᴵ ions. ...
DOI:
10.1515/znb-2018-0069

62. A tetranuclear copper (II) complex with pyrazole-3,5-dicarboxylate ligands: synthesis, characterization and electrochemical properties

Author:
Selçuk Demir; Hamide Merve Çepni; Małgorzata Hołyńska; Muammer Kavanoz
Source:
Zeitschrift für Naturforschung 2016 v.71 no.4 pp. 305-310
ISSN:
1865-7117
Subject:
X-ray diffraction; ambient temperature; anions; cations; copper; crystal structure; electrochemistry; hydrogen bonding; ligands; magnetism; oxidation; thermogravimetry
Abstract:
... A tetranuclear copper (II) complex with pyrazole-3,5-dicarboxylate ligands (pdc³⁻), [Me₂NH₂]₄[Cu₄(pdc)₄], was synthesized using solvothermal and metal oxidation routes and characterized by elemental analysis, infrared, thermogravimetry/differential thermal analysis, and room-temperature magnetic measurements. The structure of the complex was determined by single-crystal X-ray diffraction. It compr ...
DOI:
10.1515/znb-2015-0197

63. Benzimidazolines Convert Sulfur Dioxide to Bisulfate at Room Temperature and Atmospheric Pressure Utilizing Aerial Oxygen

Author:
Mehrotra Sonam; Raje Sakthi; Jain Anant Kumar; Angamuthu Raja
Source:
ACS sustainable chemistry 2017 v.5 no.7 pp. 6322-6328
ISSN:
2168-0485
Subject:
X-ray diffraction; ambient temperature; anions; atmospheric pressure; cages; cations; electrospray ionization mass spectrometry; encapsulation; hydrides; hydrogen bonding; nuclear magnetic resonance spectroscopy; oxygen; sulfur dioxide
Abstract:
... By employing a simple strategy of reacting SO₂ gas with easily attainable hydride donors such as 2-substituted-1,3-dimethyl-2,3-dihydro-1H-benzo[d]imidazole, benzimidazoline and SO₂ were converted into benzimidazolium bisulfate at room temperature and atmospheric pressure. Bisulfate originated from SO₂ and hydride from benzimidazoline and aerial oxygen. Metastable dimers of bisulfate anions were o ...
DOI:
10.1021/acssuschemeng.7b01495

64. Biologically Analogous Calcium Phosphate Tubes from a Chemical Garden

Author:
Hughes Erik A. B.; Williams Richard L.; Cox Sophie C.; Grover Liam M.
Source:
Langmuir 2017 v.33 no.8 pp. 2059-2067
ISSN:
1520-5827
Subject:
X-radiation; X-ray diffraction; anions; calcium; cations; dicalcium phosphate; gels; hydroxyapatite; microstructure; mineralization; pH; scanning electron microscopy; solutes
Abstract:
... Calcium phosphate (CaPO₄) tubes with features comparable to mineralized biological microstructures, such as Haversian canals, were grown from a calcium gel/phosphate solution chemical garden system. A significant difference in gel mass in response to high and low solute phosphate equivalent environments existed within 30 min of solution layering upon gel (p = 0.0067), suggesting that the nature of ...
DOI:
10.1021/acs.langmuir.6b04574

65. Crystallization and Rheology of Poly(ethylene oxide) in Imidazolium Ionic Liquids

Author:
Liu Fuyong; Lv Yuxia; Liu Jiajian; Yan Zhi-Chao; Zhang Baoqing; Zhang Jun; He Jiasong; Liu Chen-Yang
Source:
Macromolecules 2016 v.49 no.16 pp. 6106-6115
ISSN:
1520-5835
Subject:
X-ray diffraction; anions; cations; contact angle; crystallization; energy; equations; ionic liquids; melting point; molecular weight; polyethylene glycol; polymethylmethacrylate; rheology; solubility; viscosity
Abstract:
... Polymer and ionic liquid (IL) mixtures have attracted an increasing amount of attention due to their unique properties and potential applications. The interactions between poly(ethylene oxide) (PEO) and imidazolium ILs of different cation alkyl lengths and anion structures have been investigated by measuring melting points (Tₘ), contact angles, and rheological properties. Tₘ of crystalline PEO dra ...
DOI:
10.1021/acs.macromol.6b01171

66. Equiatomic indides REIrIn (RE=La, Pr, Nd, Er–Yb) – Crystal and electronic structure

Author:
Nazar Zaremba; Ihor Muts; Viktor Hlukhyy; Sebastian Stein; Ute Ch. Rodewald; Volodymyr Pavlyuk; Rainer Pöttgen; Vasyl Zaremba
Source:
Zeitschrift für Naturforschung 2017 v.72 no.9 pp. 631-638
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; cations; chemical bonding; crystal structure; furnaces; indium; iridium; solid solutions
Abstract:
... The equiatomic rare earth iridium indides REIrIn (RE=La, Pr, Nd, Er–Yb) were synthesized by reaction of the elements in induction or muffle furnaces and were characterized through X-ray powder patterns. The structures of LaIr₀.₈₆In₁.₁₄, PrIr₀.₈₉In₁.₁₁, NdIr₀.₉₄In₁.₀₆, ErIrIn (all ZrNiAl type, P6̅2m), and YbIrIn (TiNiSi type, Pnma) were refined from single crystal X-ray diffractometer data. Refinem ...
DOI:
10.1515/znb-2017-0086

67. Fe-MoS4: An Effective and Stable LDH-Based Adsorbent for Selective Removal of Heavy Metals

Author:
Jawad Ali; Liao Zhuwei; Zhou Zhihua; Khan Aimal; Wang Ting; Ifthikar Jerosha; Shahzad Ajmal; Chen Zhulei; Chen Zhuqi
Source:
ACS applied materials & interfaces 2017 v.9 no.34 pp. 28451-28463
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-radiation; X-ray diffraction; X-ray photoelectron spectroscopy; absorbents; adsorbents; anions; arsenic; binding sites; cations; chromium; cobalt; copper; heavy metals; lead; mercury; nickel; oxidation; scanning electron microscopy; silver; sorption; sorption isotherms; zinc
Abstract:
... It has always been a serious challenge to design efficient, selective, and stable absorbents for heavy-metal removal. Herein, we design layered double hydroxide (LDH)-based Fe-MoS₄, a highly efficient adsorbent, for selective removal of heavy metals. We initially synthesized FeMgAl-LDH and then enriched its protective layers with MoS₄²– anions as efficient binding sites for heavy metals. Various c ...
DOI:
10.1021/acsami.7b07208

68. From aqueous speciation to supramolecular assembly in alkaline earth-uranyl polyoxometalates

Author:
Clément FalaiseCurrent address: Université de Rennes 1, Institut des Sciences Chimiques de Rennes (ISCR), Rennes, France.; Sarah M. Hickam; Peter C. Burns; May Nyman
Source:
Chemical communications 2017 v.53 no.69 pp. 9550-9553
ISSN:
1364-548X
Subject:
Raman spectroscopy; X-ray diffraction; anions; barium; calcium; cations; chemical reactions; microscopy; strontium
Abstract:
... The interplay between aqueous alkaline earth (Ca, Sr, Ba) polycationic speciation and uranyl–peroxide polyoxometalate self-assembly and evolution is described here using solution (Raman and X-ray scattering) and solid-state (microscopy, X-ray diffraction) characterization. Supramolecular assembly of Sr-encapsulated and decorated polyanions and polycations yields the fourth largest inorganic unit c ...
DOI:
10.1039/c7cc05357f

69. High-Pressure Structural Response of an Insensitive Energetic Crystal: Dihydroxylammonium 5,5′-Bistetrazole-1,1′-diolate (TKX-50)

Author:
Dreger Zbigniew A.; Stash Adam I.; Yu Zhi-Gang; Chen Yu-Sheng; Tao Yuchuan
Source:
The Journal of Physical Chemistry C 2017 v.121 no.10 pp. 5761-5767
ISSN:
1932-7455
Subject:
X-ray diffraction; anions; cations; compressibility; crystals; hydrogen bonding; prediction
Abstract:
... The structural response of a novel, insensitive energetic crystaldihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (TKX-50)was examined under high pressure. Using synchrotron single-crystal X-ray diffraction measurements, details of molecular, intermolecular, and crystal changes were determined to ∼10 GPa to understand its structural stability. The experimental results showed that TKX-50 exhibit ...
DOI:
10.1021/acs.jpcc.7b00867

70. Novel hydrogen- and halogen-bonding anion receptors based on 3-iodopyridinium units

Author:
Valeria Amendola; Greta Bergamaschi; Massimo Boiocchi; Nadia Fusco; Mario Vincenzo La Rocca; Laura Linati; Eliana Lo Presti; Massimo Mella; Pierangelo Metrangolo; Ana Miljkovic
Source:
RSC advances 2016 v.6 no.72 pp. 67540-67549
ISSN:
2046-2069
Subject:
X-ray diffraction; acetonitrile; anions; binding properties; cations; crystals; hydrogen; hydrogen bonding; iodine; models; nitrates; nuclear magnetic resonance spectroscopy; protons; receptors; ultraviolet-visible spectroscopy
Abstract:
... Novel tripodal 3-iodopyridinium-based receptors were investigated through (i) UV-vis and NMR titrations with anions in solution, (ii) theoretical calculations, and (iii) X-ray diffraction studies. Their anion binding properties were compared to those of the monobranched model and/or non-halogenated model systems. Investigations in acetonitrile pointed out that the iodine atom in the meta position ...
DOI:
10.1039/c6ra14703h

71. Solvent Dielectricity-Modulated Helical Assembly and Morphologic Transformation of Achiral Surfactant-Inorganic Cluster Ionic Complexes

Author:
Zhang Jing; Chen Xiaofei; Li Wen; Li Bao; Wu Lixin
Source:
Langmuir 2017 v.33 no.44 pp. 12750-12758
ISSN:
1520-5827
Subject:
X-ray diffraction; anions; cationic surfactants; cations; electrostatic interactions; nuclear magnetic resonance spectroscopy; scanning electron microscopy; solvents; transmission electron microscopy
Abstract:
... Ionic complexes comprising single/double chain cationic surfactant and Lindqvist-type polyoxomolybdate anionic cluster were used for controlled self-assembly in organic solutions. In the solvent with low dielectric constant the complexes self-assembled into flat ribbon like lamellar aggregations with an inverse bilayer substructure where the cluster located at the middle. Under the condition of in ...
DOI:
10.1021/acs.langmuir.7b01259

72. Synthesis, structures, and properties of Mn(II) and Cd(II) thiocyanato coordination compounds with 2,5-dimethylpyrazine as co-ligand

Author:
Stefan Suckert; Susanne Wöhlert; Christian Näther
Source:
Zeitschrift für Naturforschung 2016 v.71 no.5 pp. 381-390
ISSN:
1865-7117
Subject:
X-radiation; X-ray diffraction; anions; cadmium; cations; crystal structure; crystals; ethanol; geometry; ligands; liquids; manganese; methanol; pyrazines; thermogravimetry; thiocyanates
Abstract:
... Reaction of manganese (II) thiocyanate with 2,5-dimethylpyrazine leads to the formation of three new coordination compounds of compositions Mn(NCS)₂(2,5-dimethylpyrazine)₂(H₂O)₂ (1), Mn(NCS)₂(H₂O)₂(MeOH)₂-tris(2,5-dimethylpyrazine) solvate (2), and Mn(NCS)₂ (H₂O)₄-tetrakis(2,5-dimethylpyrazine) solvate (3) that were characterized by single crystal X-ray diffraction. In their crystal structures, th ...
DOI:
10.1515/znb-2015-0182

73. Temperature-controlled formation of Anderson-type compounds and their conversion to [γ-Mo₈O₂₆]⁴⁻-based variants using pendent ligands

Author:
Ai-xiang Tian; Ting-ting Li; Yan Tian; Huai-ping Ni; Xue-bin Ji; Jia-ni Liu; Guo-cheng Liu; Jun Ying
Source:
Zeitschrift für Naturforschung 2017 v.72 no.9 pp. 655-664
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; cations; chromium; copper; electrochemistry; hydrogen; hydrogen bonding; ligands; photocatalysis; silver; tea; temperature
Abstract:
... By tuning the reaction temperature, two Anderson- and two [γ-Mo₈O₂₆]⁴⁻-based compounds decorated by pendent organic ligands, [Cuᴵᴵ₉(bpz)₂(pz)₂(H₂O)₂₄][H₂(Cr(OH)₅Mo₆O₁₉)₄]·11H₂O (1), [Cuᴵᴵ(bpz)₂(H₂O)₂(γ-H₄Mo₈O₂₆)]·2H₂O (2), [Cuᴵᴵ₂(tea)₂(H₂O)₆(HCr(OH)₆Mo₆O₁₈)₂]· 6H₂O (3) and [Agᴵ(bpz)(H₂O)(γ-H₄Mo₈O₂₆)₀.₅] (4) (bpz=4-butyl-1H-pyrazole, pz=1H-pyrazole, tea=2-[1,2,4]triazol-4-yl-ethylamine), have been ...
DOI:
10.1515/znb-2017-0069

74. Thermally stable energetic salts based on 3-nitramino-4-tetrazolefurazan

Author:
Haifeng Huang; Yameng Shi; Ying Li; Yanfang Liu; Jun Yang
Source:
RSC advances 2016 v.6 no.69 pp. 64568-64574
ISSN:
2046-2069
Subject:
X-ray diffraction; ammonium salts; anions; carbon; cations; energy; enthalpy; equations; friction; neutralization; nitrogen; nuclear magnetic resonance spectroscopy; stable isotopes; temperature; thermal stability
Abstract:
... In order to develop new energetic materials with high energy and low sensitivity, a series of nitrogen-rich energetic salts based on 3-nitramino-4-tetrazolefurazan were conveniently synthesized through nitration, neutralization and metathesis reaction. All energetic salts were fully characterized by NMR (¹H, ¹³C), IR and elemental analysis. Furthermore, ammonium salt (2) was confirmed by ¹⁵N NMR a ...
DOI:
10.1039/c6ra12109h

75. Towards understanding the salt-intercalation exfoliation of graphite into graphene

Author:
Shufen Wang; Chao Wang; Xiang Ji
Source:
RSC advances 2017 v.7 no.82 pp. 52252-52260
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; anions; cations; energy-dispersive X-ray analysis; graphene; lithium; lithium chloride; potassium chloride; sulfates; ultraviolet-visible spectroscopy
Abstract:
... The preparation of graphene from graphite is critical for both theoretical studies and real-world applications. Herein, we present a systematic study to explore the fundamental factors that control the exfoliation of graphite into graphene in a salt-intercalation exfoliation system, using various inorganic salts as intercalators. The yields of the thin graphene sheets obtained, measured via UV-vis ...
DOI:
10.1039/c7ra07489a

76. Two new organic-selenate salts: syntheses and crystal structures of bis(di-iso-propylammonium) selenate and di-n-butylammonium hydrogenoselenate

Author:
Waly Diallo; Libasse Diop; Cheikh Abdoul Khadir Diop; Laurent Plasseraud; Hélène Cattey
Source:
Zeitschrift für Naturforschung 2017 v.72 no.6 pp. 425-432
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; cations; crystal structure; hydrogen bonding; nuclear magnetic resonance spectroscopy; selenates; stable isotopes
Abstract:
... Two new dialkyammonium selenate salts [i-Pr₂NH₂]₂[SeO₄] (1) and [n-Bu₂NH₂][HSeO₄] (2) have been isolated and characterized by single-crystal X-ray diffraction. Salt 1 crystallizes in the monoclinic system, space group P2₁/n with a=8.7190(5), b=8.8500(4), c=22.5953(9) Å, β=94.6290(17)°, V=1737.84(14) ų and Z=4. Salt 2 crystallizes in the monoclinic system space group P2₁/n with a=10.9328(9), b=8.1 ...
DOI:
10.1515/znb-2017-0032

77. Unraveling the Stepwise Melting of an Ionic Liquid

Author:
Lima Thamires A.; Paschoal Vitor H.; Faria Luiz F. O.; Ribeiro Mauro C. C.
Source:
Journal of physical chemistry 2017 v.121 no.17 pp. 4650-4655
ISSN:
1520-5207
Subject:
Raman spectroscopy; X-ray diffraction; anions; cations; differential scanning calorimetry; ionic liquids; melting
Abstract:
... Differential scanning calorimetry, X-ray diffraction, and Raman spectroscopy were used to reveal the premelting events precursors of melting of the ionic liquid triethylsulfonium bis(trifluoromethanesufonyl)imide, [S₂₂₂][NTf₂]. On heating the crystalline phase of [S₂₂₂][NTf₂], melting occurs along a sequence of at least three steps. First, the crystalline long-range order breaks down, but local or ...
DOI:
10.1021/acs.jpcb.7b03178

78. A facile synthesis of gold micro/nanostructures at the interface of 1,3-dibutylimidazolium bis(trifluoromethylsulfonyl)imide and water

Author:
Kaisheng Yao; Qingling Huang; Weiwei Lu; Airong Xu; Xinying Li; Hucheng Zhang; Jianji Wang
Source:
Journal of colloid and interface science 2016 v.480 pp. 30-38
ISSN:
0021-9797
Subject:
Raman spectroscopy; X-ray diffraction; anions; cations; energy-dispersive X-ray analysis; gold; nanogold; scanning electron microscopy; transmission electron microscopy
Abstract:
... The development of a simple, template-free, and one-step strategy to synthesize nanostructured Au architectures with fascinating morphology is highly desirable and technically important due to their valuable applications in varied fields. In this work, the “green” strategy of “tunable ionic liquids-water (ILs-H2O) interfacial synthesis” developed previously by us is utilized for feasible synthesis ...
DOI:
10.1016/j.jcis.2016.06.074

79. A novel PAN/NaX/ZnO nanocomposite absorbent: synthesis, characterization, removal of uranium anionic species from contaminated water

Author:
H. R. Shakur; Kh. Rezaee Ebrahim Saraee; M. R. Abdi; G. Azimi
Source:
Journal of materials science 2016 v.51 no.22 pp. 9991-10004
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; anions; atomic absorption spectrometry; cations; nanocomposites; nanoparticles; pH; polyacrylonitrile; scanning electron microscopy; surface area; temperature; transmission electron microscopy; uranium; water pollution; zeolites; zinc oxide
Abstract:
... In this study, a novel PAN/NaX/ZnO nanocomposite absorbent was introduced and its ability to remove of uranium anionic species, which are the most dominant species of uranium in water at natural pH, from contaminated waters was studied. In this regards, micro and nano sized NaX zeolite and PAN/NaX/ZnO nanocomposite were successfully synthesized and characterized using various methods, including X- ...
DOI:
10.1007/s10853-016-0227-7

80. A simple nanoporous silica-based dual mode optical sensor for detection of multiple analytes (Fe³⁺, Al³⁺ and CN⁻) in water mimicking XOR logic gate

Author:
Jafar Afshani; Alireza Badiei; Negar Lashgari; Ghodsi Mohammadi Ziarani
Source:
RSC advances 2016 v.6 no.7 pp. 5957-5964
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; aluminum; anions; cations; chemical species; color; cyanides; detection limit; fluorescence; fluorescence emission spectroscopy; iron; nanopores; optical properties; thermogravimetry
Abstract:
... A simple but versatile nanoporous silica-based optical sensor was synthesized and characterized using different techniques such as XRD, BET, TGA, and FT-IR. The sensing ability of the sensor was examined upon addition of a wide variety of cations and anions in water both visually and by fluorescent spectroscopy. The color of the water suspension of the sensor changed from beige to brown in the pre ...
DOI:
10.1039/c5ra23136a

81. Absorption and desorption of SO2 in aqueous solutions of diamine-based molten salts

Author:
Seung Rok Lim; Junhyeok Hwang; Chang Soo Kim; Ho Seok Park; Minserk Cheong; Hoon Sik Kim; Hyunjoo Lee
Source:
Journal of hazardous materials 2015 v.289 pp. 63-71
ISSN:
0304-3894
Subject:
X-ray diffraction; absorption; anions; aqueous solutions; cations; chlorides; desorption; octane; spectroscopy; sulfates; sulfur dioxide
Abstract:
... SO2 absorption and desorption behaviors were investigated in aqueous solutions of diamine-derived molten salts with a tertiary amine group on the cation and a chloride anion, including butyl-(2-dimethylaminoethyl)-dimethylammonium chloride ([BTMEDA]Cl, pKb=8.2), 1-butyl-1,4-dimethylpiperazinium chloride ([BDMP]Cl, pKb=9.8), and 1-butyl-4-aza-1-azoniabicyclo[2,2,2]octane chloride ([BDABCO]Cl, pKb=1 ...
DOI:
10.1016/j.jhazmat.2015.02.022

82. Adsorption and intercalation of organic pollutants and heavy metal ions into MgAl-LDHs nanosheets with high capacity

Author:
Jian Li; Hongzhi Cui; Xiaojie Song; Guosong Zhang; Xinzhen Wang; Qiang Song; Na Wei; Jian Tian
Source:
RSC advances 2016 v.6 no.95 pp. 92402-92410
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; cations; chromium; energy-dispersive X-ray analysis; heavy metals; ion exchange; metal ions; methyl orange; nanosheets; nickel; pollutants; scanning electron microscopy; sorption isotherms; surface area; transmission electron microscopy; water purification
Abstract:
... Hexagonal MgAl layered double hydroxide (MgAl-LDH) materials comprised of nanosheets and microsheets with different precipitants were synthesized via a facile hydrothermal route. XRD, FESEM, TEM and BET were employed to characterize the samples. Structural characterization revealed that MgAl-LDHs nanosheets and microsheets are 100 nm and 2 μm in width, respectively. Furthermore, MgAl-LDHs nanoshee ...
DOI:
10.1039/c6ra18783h

83. Crystal structure and microwave dielectric characteristics of Co-substituted Zn₁₋ₓCoₓZrNb₂O₈ (0 ≤ x ≤ 0.1) ceramics

Author:
H. L. Pan; Q. Q. Liu; Y. H. Zhang; H. T. Wu
Source:
RSC advances 2016 v.6 no.90 pp. 86889-86903
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; anions; cations; ceramics; chemical bonding; cobalt; crystal structure; dielectric properties; energy; intrinsic factors; oxygen; temperature; thermal expansion; vibration
Abstract:
... Wolframite structure Zn₁₋ₓCoₓZrNb₂O₈ (x = 0, 0.02, 0.04, 0.06, 0.08, 0.10) ceramics were prepared by the conventional solid state method. The crystal structures were studied via X-ray diffraction, and lattice vibrational modes were obtained by Raman spectroscopy. It could be found that all the A-site (Zn²⁺/Co²⁺, Zr⁴⁺) and B-site (Nb⁵⁺) cations were octahedrally coordinated with oxygen anions from ...
DOI:
10.1039/c6ra20197k

84. Effects of Composition and Structure of Mg/Al Oxides on Their Activity and Selectivity for the Condensation of Methyl Ketones

Author:
Shylesh Sankaranarayanapillai; Kim Daeyoup; Gokhale Amit A.; Canlas Christian G.; Struppe Jochem O.; Ho Christopher R.; Jadhav Deepak; Yeh Alice; Bell Alexis T.
Source:
Industrial & Engineering Chemistry Research 2016 v.55 no.40 pp. 10635-10644
ISSN:
1520-5045
Subject:
X-ray diffraction; aluminum; aluminum oxide; anions; catalysts; cations; chemical bonding; chemical composition; condensation reactions; crystallites; engineering; gases; hydrotalcite; ketones; magnesium; magnesium oxide; nuclear magnetic resonance spectroscopy; oxygen; stable isotopes; temperature; thermal degradation
Abstract:
... The effects of chemical composition and pretreatment on Mg–Al hydrotalcites and alumina-supported MgO were evaluated for the gas-phase, self-condensation reaction of C₃–C₅ biomass-derived methyl ketones. We show that the selectivity toward the acyclic dimer enone and the cyclic enone trimer can be tuned by controlling the temperature of hydrotalcite calcination. Methyl ketone cyclization is promot ...
DOI:
10.1021/acs.iecr.6b03601

85. Facile electrosynthesis of nano flower like metal-organic framework and its nanocomposite with conjugated polymer as a novel and hybrid electrode material for highly capacitive pseudocapacitors

Author:
Maryam Naseri; Lida Fotouhi; Ali Ehsani; Saeed Dehghanpour
Source:
Journal of Colloid And Interface Science 2016 v.484 pp. 314-319
ISSN:
0021-9797
Subject:
X-ray diffraction; copper; surface area; dielectric spectroscopy; cations; electrodes; nanocomposites; electrochemistry; anions; scanning electron microscopy; electrical equipment; polymers; graphene
Abstract:
... The [Cu(btec)0.5DMF] (H4btec=1,2,4,5-benzenetetracarboxylate acid) was electrosynthesized on the graphite working electrode by applying catholic potential. The [Cu(btec)0.5DMF] grows on a graphite surface which results from the coordination of 1,2,4,5-benzenetetracarboxylate anions with Cu2+ cations. The electrosynthesized [Cu(btec)0.5DMF] was characterized by X-ray diffraction, scanning electron ...
DOI:
10.1016/j.jcis.2016.09.001

86. Haloaluminate-Free Cationic Aluminum Complexes: Structural Characterization and Physicochemical Properties

Author:
Mandai Toshihiko; Johansson Patrik
Source:
The Journal of Physical Chemistry C 2016 v.120 no.38 pp. 21285-21292
ISSN:
1932-7455
Subject:
X-ray diffraction; aluminum; aluminum chloride; ambient temperature; anions; batteries; calcium; cations; coatings; dimethyl sulfoxide; electrochemistry; energy; fertilizers; ligands; liquids; magnesium; physical chemistry; physicochemical properties; spectroscopy
Abstract:
... The large electrochemical activities of haloaluminate anions [AlₙX₃ₙ₊₁]⁻, anionic complexes derived from AlX₃ and Lewis basic fertilizers, have significantly contributed to the development of industrial coatings and more recently also to electrochemical energy storage. In contrast, cationic metal complexes have just emerged as a class of species interesting as multivalent main charge carriers for ...
DOI:
10.1021/acs.jpcc.6b07235

87. Importance of polarization assisted/resonance assisted hydrogen bonding interactions and unconventional interactions in crystal formations of five new complexes bearing chelidamic acid through a proton transfer mechanism

Author:
Masoud Mirzaei; Hossein Eshtiagh-Hosseini; Mojtaba Shamsipur; Mahdi Saeedi; Mehdi Ardalani; Antonio Bauzá; Joel T. Mague; Antonio Frontera; Morteza Habibi
Source:
RSC advances 2015 v.5 no.89 pp. 72923-72936
ISSN:
2046-2069
Subject:
X-ray diffraction; amines; anions; cations; chromium; ferric chloride; geometry; hydrogen bonding; infrared spectroscopy; ligands; nitrogen; oxygen; pyridines
Abstract:
... (H4a-dmpy)[Cr(Hcda)₂]·4H₂O (1), (H2a-4,6-dmpym)[Cr(Hcda)₂]·3H₂O·2a-4,6-dmpym (2), [M(Hcda)(H₂O)₃]·H₂O (3) and (4) (M = Coᴵᴵ and Niᴵᴵ, respectively) and (H2a-4mpy)₂[FeCl₃(Hcda)]·3H₂O (5) (H₃cda = 4-hydroxypyridine-2,6-dicarboxylate or chelidamic acid; 4a-dmpy = 4-aminodimethylpyridine; 2a-4,6-dmpym = 2-amino-4,6-dimethylpyrimidine; 2a-4mpy = 2-amino-4-methylpyridine) are five new coordination compo ...
DOI:
10.1039/c5ra09526c

88. Ionic binuclear ferrocenyl compounds containing 1,1,3,3-tetracyanopropenide anions – synthesis, structural characterization and catalytic effects on thermal decomposition of main components of solid propellants

Author:
Dongmei Zhao; Jizhen Li; Fuqiang Bi; Yahui Yang; Xiaoni Gao; Weiqiang Zhang; Guofang Zhang; Ziwei Gao
Source:
Zeitschrift für Naturforschung 2015 v.70 no.5 pp. 317-326
ISSN:
1865-7117
Subject:
X-ray diffraction; ammonium perchlorate; anions; catalysts; catalytic activity; cations; heat; nitrates; temperature; thermal degradation; thermal stability
Abstract:
... Alkyl-substituted ferrocenes are typical burning-rate catalysts in composite solid propellants, but their high migration tendency and volatility has impeded their extensive applications. By introducing the concept of ionic energetic compounds, eight new ionic binuclear ferrocenyl compounds, [FcCH₂N(CH₃)₂(CH₂)ₙN(CH₃)₂CH₂Fc]²⁺ (X–₂) (Fc = ferrocenyl; X– = 1,1,3,3-tetracyano propenide; n = 3–10; the ...
DOI:
10.1515/znb-2014-0251

89. Is a medium-range order pre-peak possible for ionic liquids without an aliphatic chain?

Author:
Marco Campetella; Serena De Santis; Ruggero Caminiti; Paolo Ballirano; Claudia Sadun; Luana Tanzi; Lorenzo Gontrani
Source:
RSC advances 2015 v.5 no.63 pp. 50938-50941
ISSN:
2046-2069
Subject:
X-radiation; X-ray diffraction; amino acids; anions; cations; choline; hydrogen bonding; ionic liquids; liquids; molecular dynamics; small-angle X-ray scattering
Abstract:
... The combination of amino acids anions with a choline cation gives origin to a new and potentially important class of organic ionic liquids that might represent a viable and bio-compatible alternative with respect to the traditional ones. We present here a combined experimental and theoretical study of a choline–proline ionic liquid, using both large and small angle X-ray diffraction (WAXS–SAXS), a ...
DOI:
10.1039/c5ra07567j

90. New cobalt(II) and nickel(II) complexes of benzyl carbazate Schiff bases: Syntheses, crystal structures, in vitro DNA and HSA binding studies

Author:
Palanivelu Nithya; Sannasi Helena; Jim Simpson; Malaichamy Ilanchelian; Aathi Muthusankar; Subbiah Govindarajan
Source:
Journal of photochemistry and photobiology 2016 v.165 pp. 220-231
ISSN:
1011-1344
Subject:
DNA; X-ray diffraction; anions; binding properties; calves; cations; cobalt; crystal structure; fluorescence; geometry; human serum albumin; isothiocyanates; ligands; molecular models; nickel; nitrogen; oxygen; schiff bases; spectral analysis
Abstract:
... In the present study, new Schiff base complexes with the composition [M(NCS)2(L1)2]·nH2O, where M=Co (n=0) (1) and Ni (n=2) (2); [M(NCS)2(L2)2], M=Co (3) and Ni (4) as well as [M(NCS)2(L3)2], M=Co (5) and Ni (6); (L1=benzyl 2-(propan-2-ylidene)hydrazinecarboxylate, L2=benzyl 2-(butan-2-ylidene)hydrazinecarboxylate and L3=benzyl 2-(pentan-3-ylidene)hydrazinecarboxylate) have been synthesized by a t ...
DOI:
10.1016/j.jphotobiol.2016.10.024

91. One-step synthesis of CDTA coated magnetic nanoparticles for selective removal of Cu(II) from aqueous solution

Author:
Haixia Lü; Xiaoming Wang; Jingqi Yang; Zenghong Xie
Source:
International journal of biological macromolecules 2015 v.78 pp. 209-214
ISSN:
0141-8130
Subject:
X-ray diffraction; absorption; adsorbents; adsorption; anions; aqueous solutions; atomic absorption spectrometry; cations; copper; lakes; magnetite; nanoparticles; pH; scanning electron microscopy; solid phase extraction
Abstract:
... A novel 1,2-cyclohexylenedinitrilotetraacetic acid (CDTA) modified Fe3O4 magnetic nanoparticles (MNPs) was synthesized by one-step solvothermal method and used as solid phase extraction (SPE) material to preconcentrate trace copper coupled with flame atomic absorption spectrometry (FAAS). The synthesized adsorbents were characterized by field emission scanning electron microscopy and X-ray powder ...
DOI:
10.1016/j.ijbiomac.2015.03.065

92. Physicochemical performance of FeCO₃ films influenced by anions

Author:
Chengqiang Ren; Wanguo Wang; Xing Jin; Li Liu; Taihe Shi
Source:
RSC advances 2015 v.5 no.26 pp. 20302-20308
ISSN:
2046-2069
Subject:
X-ray diffraction; anions; aqueous solutions; carbon dioxide; cations; corrosion; dielectric spectroscopy; electrochemistry; iron carbonate; microstructure; scanning electron microscopy; semiconductors; sodium bicarbonate; sodium chloride; sodium sulfate; steel
Abstract:
... The corrosion film plays an important role in the further electrochemical processes of steel in CO₂ corrosion. Thus, the physicochemical performance of an FeCO₃ film was investigated using the Mott–Schottky electrochemical technique, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The performance of the FeC ...
DOI:
10.1039/c4ra14313b

93. Racemic and conglomerate 1-(4-haloaryl)ethylammonium tetrachlorocobaltate salts: formation of helical structures

Author:
H. M. Mande; P. S. Ghalsasi; N. Arulsamy
Source:
RSC advances 2015 v.5 no.77 pp. 62719-62723
ISSN:
2046-2069
Subject:
X-ray diffraction; amines; anions; cations; chlorides; cobalt; color; crystallization; crystals; enantiomers; hydrochloric acid; hydrogen bonding; ligands; nitrogen; optical isomerism; thermogravimetry
Abstract:
... The racemic ligand rac-1-(4-fluorophenyl)ethylamine (rac-fpea) reacts with cobalt(ii) chloride in the presence of hydrochloric acid forming an A₂CoCl₄ type salt, [rac-fpeaH]₂[CoCl₄] (1). The salt crystallizes in the centro-symmetric P1̄ space group. In contrast, under identical conditions the chloro derivative rac-1-(4-chlorophenyl)ethylamine (rac-cpea) yields a conglomerate of A₃CoCl₄Cl type salt ...
DOI:
10.1039/c5ra11719d

94. Reversible anion intercalation in a layered aromatic amine: a high-voltage host structure for organic batteries

Author:
Élise Deunf; Philippe Moreau; Éric Quarez; Dominique Guyomard; Franck Dolhem; Philippe Poizot
Source:
Journal of materials chemistry A 2016 v.4 no.16 pp. 6131-6139
ISSN:
2050-7496
Subject:
X-ray diffraction; anions; batteries; cations; crystallization; electrochemistry; electrodes; graphene; lithium; moieties; transmission electron microscopy
Abstract:
... Cation insertion reactions in inorganic host frameworks are well-established phenomena. Over the last 40 years, a myriad of examples have been documented, which have given rise to key applications such as for electrochemical storage devices. By contrast, materials able to reversibly insert anions into their host lattice are rare, and consist essentially of graphite intercalation compounds (GICs), ...
DOI:
10.1039/c6ta02356h

95. Selective picomolar level fluorometric sensing of the Cr(vi)-oxoanion in a water medium by a novel metal–organic complex

Author:
R. K. Mondal; S. Dhibar; P. Mukherjee; A. P. Chattopadhyay; R. Saha; B. Dey
Source:
RSC advances 2016 v.6 no.66 pp. 61966-61973
ISSN:
2046-2069
Subject:
X-ray diffraction; anions; aqueous solutions; arsenites; azides; bromides; cadmium; calcium; cations; chlorides; chromium; cobalt; copper; fluorescence; fluorides; fluorometry; hydrogen bonding; iron; ligands; lithium; magnesium; mercury; nickel; nitrates; perchlorates; phosphates; potassium; sodium; sulfates; zinc
Abstract:
... A novel metal–organic complex (MOC) of Cu(ii) with n-butylmalonate ligands and protonated 2-aminopyridimium rings has been synthesized and structurally characterized by single-crystal X-ray diffraction. An intriguing supramolecular interaction i.e. hydrogen-bonding pattern (like N–H⋯O and O–H⋯O) assisted lone-pair⋯π/π⋯π assembly is observed in the crystalline form of the MOC. The role of different ...
DOI:
10.1039/c6ra12819j

96. Silicon based radicals, radical ions, diradicals and diradicaloids

Author:
Kartik Chandra Mondal; Sudipta Roy; Herbert W. Roesky
Source:
Chemical Society reviews 2016 v.45 no.4 pp. 1080-1111
ISSN:
1460-4744
Subject:
X-ray diffraction; anions; carbenes; carbon; cations; chemical reactions; electron paramagnetic resonance spectroscopy; free radicals; heterocyclic nitrogen compounds; magnetism; silicon
Abstract:
... Radicals are an important class of species which act as intermediates in numerous chemical and biological processes. Most of the radicals have short lifetimes. However, radicals with longer lifetimes can be isolated and stored in a pure form. They are called stable radicals. Over the last five decades, the syntheses of several stable radicals have been reported. Recently, highly unstable radicals ...
DOI:
10.1039/c5cs00739a

97. Study of Adsorption and Intercalation of Orange-Type Dyes into Mg–Al Layered Double Hydroxide

Author:
Darmograi Ganna; Prelot Benedicte; Layrac Géraldine; Tichit Didier; Martin-Gassin Gaelle; Salles Fabrice; Zajac Jerzy
Source:
The Journal of Physical Chemistry C 2015 v.119 no.41 pp. 23388-23397
ISSN:
1932-7455
Subject:
X-ray diffraction; adsorption; anions; aqueous solutions; calorimetry; cations; desorption; dyes; enthalpy; heat production; hydroxides; methyl orange; models; moieties; monitoring; neutralization; nitrates; sodium; sorption isotherms; textile mill effluents; wastewater treatment
Abstract:
... In the context of depollution and textile wastewater treatment, the sorption-based processes are good candidates to achieve the efficient removal of such toxics substances as dyes. In the present study, the exchange–adsorption from aqueous solutions of three azoic dyes, Methyl Orange (MO), Orange II (OII), and Orange G (OG), onto Mg–Al–LDH–NO₃ layered double hydroxides (LDH, molar Mg:Al ratio of 2 ...
DOI:
10.1021/acs.jpcc.5b05510

98. Supramolecular assemblies constructed from inverted cucurbit[7]uril and lanthanide cations: synthesis, structure and sorption properties

Author:
Qing Li; Sheng-Chao Qiu; Yun-Qian Zhang; Sai-Feng Xue; Zhu Tao; Timothy J. Prior; Carl Redshaw; Qian-Jiang Zhu; Xin Xiao
Source:
RSC advances 2016 v.6 no.81 pp. 77805-77810
ISSN:
2046-2069
Subject:
X-ray diffraction; anions; cations; hydrogen bonding; macrocyclic compounds; methanol; porosity; screening; sorption; surface interactions; thermal stability
Abstract:
... The interaction of a series of lanthanide cations (Ln³⁺) with inverted cucurbit[7]uril (iQ[7]) in the presence of [ZnCl₄]²⁻ anions as a structure-directing agent have been investigated. Single-crystal X-ray diffraction analysis has revealed that the [ZnCl₄]²⁻ anions surround the iQ[7] molecules via the outer surface interactions of iQ[7]. This results in the formation of honeycomb-like frameworks, ...
DOI:
10.1039/c6ra15559f

99. Synthesis and structural characterization of BaSr₂Ge₃O₉

Author:
Sebastian Bräuchle; Clivia Hejny; Hubert Huppertz
Source:
Zeitschrift für Naturforschung 2016 v.71 no.12 pp. 1225-1232
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; barium; barium carbonate; cations; geometry; germanium; platinum; strontium; strontium carbonate
Abstract:
... BaSr₂Ge₃O₉ was prepared by high-temperature solid-state synthesis at 1100°C in a platinum crucible from barium carbonate, strontium carbonate, and germanium(IV) oxide. The compound crystallizes in the triclinic space group P1̅ (no. 2) isotypically to walstromite BaCa₂Si₃O₉. The structure was refined from single-crystal X-ray diffraction data: a=7.104(5), b=10.060(7), c=7.099(5) Å, α=83.0(2), β=77. ...
DOI:
10.1515/znb-2016-0163

100. Temperature-Induced Molecular Rearrangement of an Ionic Liquid Confined in Nanospaces: An in Situ X-ray Absorption Fine Structure Study

Author:
Jiang Fangling; Li Cheng; Fu Haiying; Wang Chenyang; Guo Xiaojing; Jiang Zheng; Wu Guozhong; Chen Shimou
Source:
The Journal of Physical Chemistry C 2015 v.119 no.39 pp. 22724-22731
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-radiation; X-ray diffraction; absorption; ambient temperature; anions; bromine; carbon nanotubes; cations; encapsulation; ionic liquids; solidification
Abstract:
... A temperature-dependent X-ray absorption fine structure (XAFS) study was performed to investigate structural changes in the 1-hexyl-3-methylimidazolium bromine (C₆mimBr) ionic liquid (IL) confined within the channels of multiwalled carbon nanotubes (MWCNTs). The XAFS spectra at room temperature confirmed the charge transfer from the bromine anion of the encapsulated IL to the MWCNTs. R-space analy ...
DOI:
10.1021/acs.jpcc.5b07325