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1. A twin-axial pseudorotaxane for phosphorescence cell imaging

Author:
Ma, Xin-Kun; Zhang, Ying-Ming; Yu, Qilin; Zhang, Haoyang; Zhang, Zhiyuan; Liu, Yu
Source:
Chemical communications 2021 v.57 no.10 pp. 1214-1217
ISSN:
1364-548X
Subject:
aqueous solutions,   etc   ; phosphorescence; rotaxanes;     Show all 3 Subjects
Abstract:
... A twin-axial pseudorotaxane is constructed using a phenylpyridine salt with diethanolamine (DA-PY) and cucurbit[8]uril (CB[8]), and it not only displays phosphorescence in aqueous solution but it can also be used for targeted cell-imaging. ...
DOI:
10.1039/d0cc06717b

2. Electrospun polymeric nanofiber decorated with sea urchin-like gold nanoparticles as an efficient and stable SERS platform

Author:
Sang, Yaqin; Chen, Xin; Zhang, Li; Li, Dongyan; Xu, Hui
Source:
Journal of colloid and interface science 2021 v.590 pp. 125-133
ISSN:
0021-9797
Subject:
aqueous solutions,   etc   ; nanofibers; nanogold; standard deviation;     Show all 4 Subjects
Abstract:
... Surface enhanced Raman scattering (SERS)-based nanoprobes have been used as well-established analytical tools enabling single-molecule detection. In this work, we report a facile method to decorate sea urchin-like gold nanoparticles (SUGNPs) on the surface of PMMA/P4VP nanofibers. Firstly, PMMA/P4VP nanofibers within the submicrometer size range were prepared by applying the electrospinning techni ...
DOI:
10.1016/j.jcis.2021.01.036

3. Mechanism of surfactant in trichloroethene degradation in aqueous solution by sodium persulfate activated with chelated-Fe(II)

Author:
Sun, Yong; Li, Ming; Gu, Xiaogang; Danish, Muhammad; Shan, Ali; Ali, Meesam; Qiu, Zhaofu; Sui, Qian; Lyu, Shuguang
Source:
Journal of hazardous materials 2021 v.407 pp. 124814
ISSN:
0304-3894
Subject:
aqueous solutions,   etc   ; groundwater; oxidation; remediation; sodium; solubilization;     Show all 6 Subjects
Abstract:
... The mechanism of surfactants in surfactant-in situ chemical oxidation (S-ISCO) coupled process for trichloroethene (TCE) degradation was firstly reported. The performance of TCE solubilization and inhibition of TCE degradation in three nonionic surfactants (TW-80, Brij-35, TX-100) in PS/Fe(II)/citric acid (CA) system was compared and TW-80 was evaluated to be the optimal surfactant in S-ISCO coupl ...
DOI:
10.1016/j.jhazmat.2020.124814

4. Orderly aligned manganese-based nanotube arrays with controllable secondary structures

Author:
Huang, Xiaoyan; Liang, Zhuoxi; Wen, Jiqiu; Liu, Yong; Taallah, Ayoub; Yao, Xin; Zhang, Zhiyou; Yu, Tian; Zhang, Sijie
Source:
RSC advances 2021 v.11 no.14 pp. 8277-8281
ISSN:
2046-2069
Subject:
aqueous solutions,   etc   ; electroplating; foams; manganese; nanopores; nanotubes;     Show all 6 Subjects
Abstract:
... By combining a hard template with a dynamic negative template, orderly aligned micrometer-length manganese nanotubes (Mn-NTs) decorated with nanopores on their walls as the secondary structure are successfully grown by electrodeposition in aqueous solution. These nanopores were characterized and analyzed statistically. It is found that these nanopores evolve along the growth direction of the Mn-NT ...
DOI:
10.1039/d0ra10210e

5. Selective Macrocycle Formation in Cavitands

Author:
Yang, Ji-Min; Yu, Yang; Rebek, Julius
Source:
Journal of the American Chemical Society 2021 v.143 no.5 pp. 2190-2193
ISSN:
1520-5126
Subject:
aqueous solutions,   etc   ; entropy; hydrophobicity; macrocyclization reactions;     Show all 4 Subjects
Abstract:
... The traditional end-to-end cyclization of long-chain linear precursors is difficult and often unpredictable because the unfavorable entropy of macrocyclic closure allows undesired intermolecular reactions to compete. Here, we apply cavitands to the selective intramolecular aldol/dehydration reaction of long-chain α,ω-dialdehydes in aqueous solution. Hydrophobic forces drive the dialdehydes into th ...
DOI:
10.1021/jacs.0c12302

6. Molecular Entrapment of Polymers by Pyrogallol[4]arenes

Author:
Shao, Li; Zhang, Hanwen; He, Xiaoqing; Hua, Bin; Hu, Xiangquan; Wan, Caixia; Kelley, Steven P.; Atwood, Jerry L.
Source:
Journal of the American Chemical Society 2021 v.143 no.2 pp. 693-698
ISSN:
1520-5126
Subject:
aqueous solutions,   etc   ; aromatic hydrocarbons; polyethylene glycol; pyrogallol;     Show all 4 Subjects
Abstract:
... Macromolecular recognition systems are difficult to construct because extremely high recognition ability is required to form a stable host–guest complex toward macromolecules. Herein, we report a novel host–guest recognition motif based on C-propylpyrogallol[4]arene (PgC₃) and a commercially available polymer, polyethylene glycol (PEG). The results show that PgC₃ can selectively entrap PEG with hi ...
DOI:
10.1021/jacs.0c12685

7. Cyclodextrin-derived polymer networks for selective molecular adsorption

Author:
Phillips, Bailey; Wang, Chenxu; Tu, Xinman; Chang, Che-Hsuan; Banerjee, Sarbajit; Al-Hashimi, Mohammed; Hu, Wei; Fang, Lei
Source:
Chemical communications 2020 v.56 no.79 pp. 11783-11786
ISSN:
1364-548X
Subject:
aqueous solutions,   etc   ; adsorption; polymers;     Show all 3 Subjects
Abstract:
... A facile synthetic method is developed to afford cyclodextrin-derived polymer networks that exhibit high selectivity in capturing certain organic compounds in water. The sustainable and scalable synthesis, together with the highly robust adsorption performance enables efficient removal and/or separation of organic molecules from aqueous solution in a continuous flow system. ...
DOI:
10.1039/d0cc04784h

8. How bulk nanobubbles are stable over a wide range of temperatures

Author:
Li, Mingbo; Ma, Xiaotong; Eisener, Julian; Pfeiffer, Patricia; Ohl, Claus-Dieter; Sun, Chao
Source:
Journal of colloid and interface science 2021 v.596 pp. 184-198
ISSN:
0021-9797
Subject:
aqueous solutions,   etc   ; acoustics; nanobubbles; shrinkage; temperature; zeta potential;     Show all 6 Subjects
Abstract:
... Bulk nanobubbles are nanoscopic gaseous domains in an aqueous solution. Their surprising long-term stability remains controversial due to the widespread assumption that spherical bubbles cannot achieve stable equilibrium. To uncover the intrinsic mechanisms underlying stabilization, the thermodynamic behavior of nanobubbles in water over a wide range of temperatures is explored.Bulk nanobubbles wi ...
DOI:
10.1016/j.jcis.2021.03.064

9. Nd(III) hypersensitive peak as an optical absorption probe for determining nitric acid in aqueous solution: An application to aqueous raffinate solutions in nuclear reprocessing

Author:
Kumar, Satendra; Maji, S.; Sundararajan, K.
Source:
Talanta 2021 v.231 pp. 122398
ISSN:
0039-9140
Subject:
aqueous solutions,   etc   ; absorbance; absorption; liquid wastes; nitric acid;     Show all 5 Subjects
Abstract:
... A new method using Nd(III) absorption peak as a probe is described for the measurement of nitric acid concentration in aqueous solution. The hypersensitive peak of Nd(III) at 575.1 nm shows a substantial enhancement in the absorbance in comparison to other absorption peaks with increasing nitric acid concentration. The integrated area and absorbance of this hypersensitive peak show a linear depend ...
DOI:
10.1016/j.talanta.2021.122398

10. Volumetric properties of disodium dihydrogen pyrophosphate aqueous solution from 283.15 to 363.15 K at 101.325 kPa

Author:
Alimov, Umarbek; Zhao, Kaiyu; Hu, Jiayin; Guo, Yafei; Meng, Lingzong; Pan, Xiuyun; Deng, Tianlong
Source:
Food chemistry 2021 v.352 pp. 129410
ISSN:
0308-8146
Subject:
aqueous solutions,   etc   ; correlation; density; food chemistry; temperature; thermal expansion; volume;     Show all 7 Subjects
Abstract:
... The purpose of this exploration was to determine the density and volumetric properties of the aqueous solution of Na₂H₂P₂O₇ with the molality varied from 0.08706 to 0.88402 mol·kg⁻¹ measured at temperature intervals of 5 K from 283.15 to 363.15 K at 101.325 kPa using Anton Paar Digital vibrating-tube densimeter. The thermal expansion coefficient (α), apparent molar volume (VΦ), expansibility (ϕE), ...
DOI:
10.1016/j.foodchem.2021.129410

11. The roles of wavelength in the gaseous toluene removal with [rad]OH from UV activated Fenton reagent

Author:
Guo, Weiwei; Li, Tianqi; Chen, Qianru; Wan, Junfeng; Zhang, Jie; Wu, Bo; Wang, Yan
Source:
Chemosphere 2021 v.275 pp. 129998
ISSN:
0045-6535
Subject:
aqueous solutions,   etc   ; bioreactors; carbon dioxide; coumarin; irradiation; synergism; toluene; wavelengths;     Show all 8 Subjects
Abstract:
... The UV lights of different wavelengths were performed in boosting hydroxyl radicals (OH) generation from traditional Fenton reagent for the gaseous toluene removal. The Fenton, UV₂₅₄/Fenton and UV₃₆₅/Fenton processes were first adopted to eliminate gaseous toluene through the bubble column reactor, respectively. The stable toluene removal efficiency in 60 min was 85.31% in the UV₃₆₅/Fenton process ...
DOI:
10.1016/j.chemosphere.2021.129998

12. A versatile logic detector and fluorescent film based on Eu-based MOF for swift detection of formaldehyde in solutions and gas phase

Author:
Che, Huachao; Li, Yong; Tian, Xike; Yang, Chao; Lu, Liqiang; Nie, Yulun
Source:
Journal of hazardous materials 2021 v.410 pp. 124624
ISSN:
0304-3894
Subject:
aqueous solutions,   etc   ; air; color; detection limit; fluorescence; formaldehyde; humans;     Show all 7 Subjects
Abstract:
... Due to the huge threat of formaldehyde (FA) on human beings, the development of chemical sensors for swift detection of FA in solutions and gas phase is highly anticipated. In this paper, a versatile logic detector and a portable fluorescent film based on small-scaled Eu-based MOF were applied successfully to detect FA in solutions and gas phase, respectively. For FA in aqueous solution, the desig ...
DOI:
10.1016/j.jhazmat.2020.124624

13. Synthesis of novel lower rim dimethylcarbamodithioate substituted calix[4]arene as selective and sensitive turn-on fluorescent sensor for detection of phosphate in aqueous solution

Author:
Karimi, Nastaran; Zadmard, Reza; Parvizi, Parisa; Jalali, Mohammad Reza
Source:
Tetrahedron letters 2021 v.71 pp. 153046
ISSN:
0040-4039
Subject:
aqueous solutions,   etc   ; aromatic hydrocarbons; fluorescence; phosphates; solvents; titration;     Show all 6 Subjects
Abstract:
... In this study, we synthesized a novel sensitive and selective dimethylcarbamodithioate substituted calix[4]arene sensor DT₂L for recognition PO₄³⁻ among 20 various anions in CH₃CN/H₂O (99:1 v/v) solvent system. The structure of DT₂L was determined by HRMS, ¹HNMR, and ¹³CNMR. The properties of DT₂L-phosphate complex were proven by fluorescence and NMR titration methods with a LOD of 7.9 nM, and bin ...
DOI:
10.1016/j.tetlet.2021.153046

14. Review on resources and recycling of germanium, with special focus on characteristics, mechanism and challenges of solvent extraction

Author:
Tao, Jiang; Tao, Zhang; Zhihong, Liu
Source:
Journal of cleaner production 2021 v.294 pp. 126217
ISSN:
0959-6526
Subject:
aqueous solutions,   etc   ; design for environment; germanium; optics; pH; prices; solvents;     Show all 7 Subjects
Abstract:
... Germanium is indispensable for various applications, especially in infrared optics, and has been designated as a strategic resource. However, independent germanium deposits are rare, and the total recovery efficiency for germanium is low. Hence, complete and rational utilization of existing germanium resources, including primary and secondary resources, is an extremely urgent requirement globally. ...
DOI:
10.1016/j.jclepro.2021.126217

15. Magnetic field assisted adsorption of pollutants from an aqueous solution: A review

Author:
Ren, Jianran; Zhu, Zhiliang; Qiu, Yanling; Yu, Fei; Ma, Jie; Zhao, Jianfu
Source:
Journal of hazardous materials 2021 v.408 pp. 124846
ISSN:
0304-3894
Subject:
aqueous solutions,   etc   ; adsorbents; adsorption; magnetic fields; pollutants; pollution;     Show all 6 Subjects
Abstract:
... The magnetic field is a special substance that exists objectively and transmits the magnetic force between objects. Magnetic fields (MFs) are gradually attracting attention as a facile, universal adsorption enhancement method, especially under the condition of low concentration of pollutants. By adjusting the type and parameters of the magnetic field, enhancement of adsorption capacity, rate and s ...
DOI:
10.1016/j.jhazmat.2020.124846

16. Developing an effective approach for microbial biosynthesis of hydroxyhydroquinone

Author:
Liu, Yuxin; Caruso, James; Zhang, Haoran
Source:
Biochemical engineering journal 2021 v.168 pp. 107929
ISSN:
1369-703X
Subject:
aqueous solutions,   etc   ; 4-hydroxybenzoic acid; Escherichia coli; biosynthesis; coculture; glucose;     Show all 6 Subjects
Abstract:
... Hydroxyhydroquinone (HHQ) is an aromatic triol with important biological activities and values. In this work, we achieved de novo HHQ bioproduction using glucose as the substrate. First, we established a cultivation method to address the issue of HHQ degradation in an aqueous solution. Second, an artificial biosynthesis pathway was constituted in E. coli to enable the conversion of glucose to HHQ ...
DOI:
10.1016/j.bej.2021.107929

17. Modelling the precipitation of nanoparticles in a closed medium in the presence of seeds: Application to amorphous silica synthesis.

Author:
Noguera, C.; Fritz, B.; Clément, A.; Lemarchand, D.
Source:
Journal of colloid and interface science 2021
ISSN:
0021-9797
Subject:
aqueous solutions,   etc   ; guidelines; microparticles; seed growth; silica; surface area;     Show all 6 Subjects
Abstract:
... Seed-mediated methods are widely used in industrial or academic laboratories for the synthesis of nanoparticles of controlled shape and size. In the natural medium, precipitation of secondary minerals also often take place on seeds. In this context, we have devised a formalism which accounts for the competition between seed growth and nucleation and growth of secondary particles in an initially ov ...
DOI:
10.1016/j.jcis.2021.03.176

18. Fire extinguishing performance and mechanism for several typical dry water extinguishing agents

Author:
Wang, Quan; Wang, Fengqi; Li, Chengxiao; Li, Zhimin; Li, Rui
Source:
RSC advances 2021 v.11 no.17 pp. 9827-9836
ISSN:
2046-2069
Subject:
aqueous solutions,   etc   ; color; fire testing; hydrophobicity; liquids; temperature; video cameras;     Show all 7 Subjects
Abstract:
... In this work, four new dry water fire extinguishing agents (FEAs) were prepared by hydrophobic SiO₂ and aqueous solution under certain conditions. The dry water FEAs were developed and we conducted two types of fire extinguishing experiments (i.e., class A solid fire and class B liquid fire test). Thermocouples and a color video camera were used to measure burning temperature and record the fire e ...
DOI:
10.1039/d1ra00253h

19. Effective removal of iodate by coprecipitation with barite: Behavior and mechanism

Author:
Tokunaga, Kohei; Takahashi, Yoshio; Tanaka, Kazuya; Kozai, Naofumi
Source:
Chemosphere 2021 v.266 pp. 129104
ISSN:
0045-6535
Subject:
aqueous solutions,   etc   ; X-ray absorption spectroscopy; barite; coprecipitation; iodates; iodine;     Show all 6 Subjects
Abstract:
... Radioactive iodine (¹²⁹I) is of great concern owing to its high mobility in the environment and long-term radiotoxicity. However, there is a lack of effective techniques for removing iodate (IO₃⁻) from aqueous solution. This study aims to develop a new technique for removing radioactive iodate from contaminated solution by using barite (BaSO₄). We examined the coprecipitation mechanism of iodate b ...
DOI:
10.1016/j.chemosphere.2020.129104

20. Probing the response of poly (N-isopropylacrylamide) microgels to solutions of various salts using etalons

Author:
Carvalho, Wildemar S.P.; Lee, Cayo; Zhang, Yingnan; Czarnecki, Adam; Serpe, Michael J.
Source:
Journal of colloid and interface science 2021 v.585 pp. 195-204
ISSN:
0021-9797
Subject:
aqueous solutions,   etc   ; acrylic acid; cations; microgels; reflectance; reflectance spectroscopy;     Show all 6 Subjects
Abstract:
... The Hofmeister series is a qualitative ordering of ions according to their ability to precipitate proteins in aqueous solution and is extremely important to consider when trying to understand materials and biomolecular structure and function. Herein, we utilized optical devices (etalons) composed of poly(N-isopropylacrylamide) (pNIPAm)-co-10% acrylic acid (AAc) or pNIPAm-based microgels to investi ...
DOI:
10.1016/j.jcis.2020.11.045