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1. A simple hydrazone as a multianalyte (Cu²⁺, Al³⁺, Zn²⁺) sensor at different pH values and the resultant Al³⁺ complex as a sensor for F⁻

Author:
Wu, Wei-Na; Wu, Hao; Wang, Yuan; Mao, Xian-Jie; Liu, Bao-Zhong; Zhao, Xiao-Lei; Xu, Zhou-Qing; Fan, Yun-Chang; Xu, Zhi-Hong
Source:
RSC advances 2018 v.8 no.10 pp. 5640-5646
ISSN:
2046-2069
Subject:
absorption; aluminum; colorimetry; copper; fluorescence; fluorides; human cell lines; hydrazones; ions; monitoring; pH; triazoles; zinc
Abstract:
... A new colorimetric and fluorescence molecular chemosensor based on triazole hydrazone can be used as a multi-probe for selective detection of Al³⁺, Zn²⁺, and Cu²⁺ by monitoring changes in the absorption and fluorescence spectral patterns. Results show that Al³⁺ and Zn²⁺ ions can induce remarkable fluorescence enhancement at pH 6.0 and pH 10.0, respectively, while the addition of Cu²⁺ ions leads to ...
DOI:
10.1039/c7ra10219d

2. A highly sensitive and selective spectrofluorimetric method for the determination of manganese at nanotrace levels in some real, environmental, biological, soil, food and pharmaceutical samples using 2-(α-pyridyl)-thioquinaldinamide

Author:
Ahmed, M. Jamaluddin; Islam, M. Tazul; Hossain, Faisal
Source:
RSC advances 2018 v.8 no.10 pp. 5509-5522
ISSN:
2046-2069
Subject:
acidity; alloys; anions; blood; calibration; cations; ethanol; fertilizers; fluorescence; fluorometry; fruits; graphs; hairs; humans; manganese; oxidation; rice; sediments; soil; sulfuric acid; syrups; tea; urine; vegetables; wheat
Abstract:
... A very simple, ultra-sensitive and highly selective non-extractive spectrofluorimetric method is presented for the determination of manganese at nano-trace levels using 2-(α-pyridyl)-thioquinaldinamide (PTQA). PTQA has been proposed as a new analytical reagent for the direct non-extractive spectrofluorimetric determination of manganese(vii). This novel fluorimetric reagent, PTQA becomes oxidized i ...
DOI:
10.1039/c7ra12762f

3. An azo-coupling reaction-based surface enhanced resonance Raman scattering approach for ultrasensitive detection of salbutamol

Author:
Yu, Shihua; Liu, Zhigang; Zhang, Jianpo; Li, Hongwei; Xu, Na; Yuan, Xin-xin; Wu, Yuqing
Source:
RSC advances 2018 v.8 no.10 pp. 5536-5541
ISSN:
2046-2069
Subject:
Raman spectroscopy; additives; biosensors; chemical species; colorimetry; fluorescence; gas chromatography-mass spectrometry; high performance liquid chromatography; magnetism; meat; moieties; rapid methods; screening; swine
Abstract:
... To date, great achievements with GC-MS, HPLC-MS, and fluorescence biosensing techniques have been made to detect illegal additives of salbutamol (SAL) in swine meat. However, these methods are not suitable for rapid on-site screening due to either costly instruments or rather complicated and/or time consuming sample pretreatments. Herein, a simple, rapid and ultrasensitive approach based on an azo ...
DOI:
10.1039/c7ra12927k

4. Catalyst-free synthesis of tetrahydropyrimidines via formal [3+3]-cycloaddition of imines with 1,3,5-hexahydro-1,3,5-triazines

Author:
Chen, Long; Liu, Kai; Sun, Jiangtao
Source:
RSC advances 2018 v.8 no.10 pp. 5532-5535
ISSN:
2046-2069
Subject:
cycloaddition reactions; imines; pyrimidines; triazines
Abstract:
... A practical and environmentally benign synthesis of poly-substituted tetrahydropyrimidines from readily available starting materials has been developed. This process features an unprecedented intermolecular formal [3+3]-annulation of imines and 1,3,5-hexahydro-1,3,5-triazines under catalyst-free conditions. Importantly, differing from previous transformations, the 1,3,5-triazines are firstly utili ...
DOI:
10.1039/c7ra11973a

5. C₂H₅OH and NO₂ sensing properties of ZnO nanostructures: correlation between crystal size, defect level and sensing performance

Author:
Quy, Chu Thi; Thai, Nguyen Xuan; Hoa, Nguyen Duc; Thanh Le, Dang Thi; Hung, Chu Manh; Van Duy, Nguyen; Van Hieu, Nguyen
Source:
RSC advances 2018 v.8 no.10 pp. 5629-5639
ISSN:
2046-2069
Subject:
X-ray diffraction; ethanol; nanoparticles; nitrogen dioxide; photoluminescence; scanning electron microscopy; temperature; thermal degradation; transmission electron microscopy; zinc oxide
Abstract:
... ZnO nanostructures can be synthesized using different techniques for gas sensor applications, but different synthesis methods produce different morphologies, specific surface areas, crystal sizes, and physical properties, which consequently influence the gas-sensing properties of materials. Many parameters such as morphology, specific surface areas, crystal sizes, and defect level can influence th ...
DOI:
10.1039/c7ra13702h

6. Development of catalyst complexes for upgrading biomass into ester-based biolubricants for automotive applications: a review

Author:
Hossain, Md. Anwar; Mohamed Iqbal, Mohammad Anwar; Julkapli, Nurhidayatullaili Muhd; San Kong, Pei; Ching, Juan Joon; Lee, Hwei Voon
Source:
RSC advances 2018 v.8 no.10 pp. 5559-5577
ISSN:
2046-2069
Subject:
biodegradability; biolubricants; biomass; catalysts; esterification; hydrogenation; metals; oils; renewable resources; separation; stereochemistry; transesterification
Abstract:
... Biomass-derived oils are recognised as the most promising renewable resources for the production of ester-based biolubricants due to their biodegradable, non-toxic and metal adhering properties. Homogeneous acid catalysts have been conventionally used in catalytic esterification and transesterification for the synthesis of ester-based biolubricants. Although homogeneous acid catalysts encounter di ...
DOI:
10.1039/c7ra11824d

7. d-Glucosamine production from chitosan hydrolyzation over a glucose-derived solid acid catalyst

Author:
Zhang, Hongkui; Lu, Yuting; Wang, Yuanhao; Zhang, Xingrong; Wang, Tingyu
Source:
RSC advances 2018 v.8 no.10 pp. 5608-5613
ISSN:
2046-2069
Subject:
catalysts; catalytic activity; chitosan; glucosamine; hydrolysis; hydrothermal carbonization; physicochemical properties; scanning electron microscopy; temperature; thermogravimetry
Abstract:
... A glucose-based solid acid catalyst (GSA) was synthesized by hydrothermal carbonization and its physicochemical properties were explored by various characterization techniques including IR, TG and SEM. In addition, its catalytic performance towards d-glucosamine formation from the hydrolysis of chitosan was extensively investigated to determine the effects of reaction parameters, such as reaction ...
DOI:
10.1039/c7ra12490b

8. Direct C–H functionalization of difluoroboron dipyrromethenes (BODIPYs) at β-position by iodonium salts

Author:
Ren, Wenming; Xiang, Huaijiang; Peng, Chengyuan; Musha, Zulipali; Chen, Jingjing; Li, Xin; Huang, Ruimin; Hu, Youhong
Source:
RSC advances 2018 v.8 no.10 pp. 5542-5549
ISSN:
2046-2069
Subject:
arylation; carbon-hydrogen bond activation; cytotoxicity; dyes; irradiation; photochemotherapy; salts
Abstract:
... A copper-catalyzed direct C–H arylation or vinylation of BODIPYs at the β-position by iodonium salts has been developed, which provides facile access to a variety of mono-substituted BODIPY dyes. Interestingly, β-styryl BODIPY compound 9b exhibits apparent cytotoxicity after laser irradiation, which has great potential for photodynamic therapy. ...
DOI:
10.1039/c7ra13070h

9. Effect of hydrogen diffusion in an In–Ga–Zn–O thin film transistor with an aluminum oxide gate insulator on its electrical properties

Author:
Nam, Yunyong; Kim, Hee-Ok; Cho, Sung Haeng; Ko Park, Sang-Hee
Source:
RSC advances 2018 v.8 no.10 pp. 5622-5628
ISSN:
2046-2069
Subject:
aluminum oxide; electrical properties; hydrogen; temperature; transistors
Abstract:
... We fabricated amorphous InGaZnO thin film transistors (a-IGZO TFTs) with aluminum oxide (Al₂O₃) as a gate insulator grown through atomic layer deposition (ALD) method at different deposition temperatures (Tdₑₚ). The Al₂O₃ gate insulator with a low Tdₑₚ exhibited a high amount of hydrogen in the film, and the relationship between the hydrogen content and the electrical properties of the TFTs was in ...
DOI:
10.1039/c7ra12841j

10. Effect of interlayer design on friction and wear behaviors of CrAlSiN coating under high load in seawater

Author:
Ye, Yuwei; Liu, Zhiyong; Liu, Wei; Zhang, Dawei; Wang, Yongxin; Zhao, Haichao; Li, Xiaogang
Source:
RSC advances 2018 v.8 no.10 pp. 5596-5607
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adhesion; chromium; coatings; corrosion; electrochemistry; friction; hardness; microstructure; nanocrystals; scanning electron microscopy; seawater; silicon; silicon nitride; stainless steel; synergism; transmission electron microscopy
Abstract:
... In this paper, CrAlSiN coatings with different interlayer designs (without interlayer, Cr interlayer, CrN interlayer and Cr/CrN interlayer) were successfully obtained on 316L stainless steel and single crystal silicon by multi-arc ion plating technique. Coating microstructure, mechanical, anticorrosion and tribological behaviors in artificial seawater were systematically investigated by XRD, SEM, ...
DOI:
10.1039/c7ra12409k

11. Effect of Ti-doping on the electrochemical performance of sodium vanadium(iii) phosphate

Author:
Zhang, Bao; Zeng, Tao; Liu, Yi; Zhang, Jia-feng
Source:
RSC advances 2018 v.8 no.10 pp. 5523-5531
ISSN:
2046-2069
Subject:
X-ray diffraction; dielectric spectroscopy; diffusivity; electrochemistry; phosphates; sodium; titanium; vanadium
Abstract:
... Na₃V₂₋ₓTiₓ(PO₄)₃ (x = 0.00, 0.05, 0.10, and 0.15) was successfully synthesized by a conventional solid-state route. The XRD results show that Ti is incorporated in the lattice of Na₃V₂(PO₄)₃ and the tetragonal structure has not been changed after doping. Among all the composites, the Na₃V₁.₉Ti₀.₁(PO₄)₃ composite delivers the highest discharge capacity of 114.87 mA h g⁻¹ at 0.1C and possesses a cap ...
DOI:
10.1039/c7ra12743j

12. Optochemical properties of gas-phase protonated tetraphenylporphyrin investigated using an optical waveguide NH₃ sensor

Author:
Tuerdi, Gulimire; Nizamidin, Patima; Kari, Nuerguli; Yimit, Abliz; Wang, Fu
Source:
RSC advances 2018 v.8 no.10 pp. 5614-5621
ISSN:
2046-2069
Subject:
ammonia; atomic force microscopy; energy; gases; glass; hydrogen sulfide; nuclear magnetic resonance spectroscopy; receptors; ultraviolet-visible spectroscopy
Abstract:
... 5,10,15,20-Tetraphenylporphyrin (TPP) was synthesized, and a glass optical waveguide (OWG, which restricts and maintains the light energy in a specific, narrow space and propagates along the space axially) was coated with a gas-phase protonated TPP thin film to develop a sensor for NH₃ gas detection. The results show that the TPP thin film agglomerated into H-based J-type aggregates after H₂S gas ...
DOI:
10.1039/c7ra11643h

13. Quantitative SPECT imaging and biodistribution point to molecular weight independent tumor uptake for some long-circulating polymer nanocarriers

Author:
Schmitt, V.; Rodríguez-Rodríguez, C.; Hamilton, J. L.; Shenoi, R. A.; Schaffer, P.; Sossi, V.; Kizhakkedathu, J. N.; Saatchi, K.; Häfeli, U. O.
Source:
RSC advances 2018 v.8 no.10 pp. 5586-5595
ISSN:
2046-2069
Subject:
attitudes and opinions; blood; blood circulation; chelating agents; chemical bonding; computed tomography; deferoxamine; half life; heart; image analysis; mice; models; molecular weight; nanocarriers; nanoparticles; neoplasms; permeability; pharmacokinetics; polymers; radiolabeling
Abstract:
... Polymeric nanocarriers are promising entities for cancer diagnosis and therapy. The aim of such nanocarriers is to selectively accumulate in cancerous tissue that is difficult to visualize or treat. The passive accumulation of a nanocarrier in a tumor through extravasation is often attributed to the enhanced permeation and retention (EPR) effect and the size and shape of the nanocarrier. However, ...
DOI:
10.1039/c7ra09183d

14. Room temperature amine sensors enabled by sidewall functionalization of single-walled carbon nanotubes

Author:
Paoletti, Clara; He, Maggie; Salvo, Pietro; Melai, Bernardo; Calisi, Nicola; Mannini, Matteo; Cortigiani, Brunetto; Bellagambi, Francesca G.; Swager, Timothy M.; Di Francesco, Fabio; Pucci, Andrea
Source:
RSC advances 2018 v.8 no.10 pp. 5578-5585
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; acetone; acetonitrile; ambient temperature; ammonia; benzene; carbon; carbon nanotubes; carboxylic acids; chemical species; chloroform; ethanol; ethyl acetate; hexane; moieties; scanning electron microscopy; trimethylamine; volatile organic compounds
Abstract:
... A new series of sidewall modified single-walled carbon nanotubes (SWCNTs) with perfluorophenyl molecules bearing carboxylic acid or methyl ester moieties are herein reported. Pristine and functionalized SWCNTs (p-SWCNTs and f-SWCNTs, respectively) were characterized by X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and scanning electron microscopy (SEM). The nitrene-based functionaliza ...
DOI:
10.1039/c7ra13304a

15. Self-assembled organic nanorods for dual chemo-photodynamic therapies

Author:
Li, Yuanyuan; Hu, Xiuli; Zheng, Xiaohua; Liu, Yang; Liu, Shi; Yue, Ying; Xie, Zhigang
Source:
RSC advances 2018 v.8 no.10 pp. 5493-5499
ISSN:
2046-2069
Subject:
antineoplastic agents; nanomedicine; nanorods; neoplasms; paclitaxel; photochemistry; photochemotherapy; photosensitizing agents; singlet oxygen
Abstract:
... Photodynamic therapy (PDT) and chemotherapy have been extensively developed as effective approaches against cancer. Herein, we constructed organic nanorods by rational co-assembly of photosensitizer, di-iodinated borondipyrromethene (BDP-I₂), and chemical anticancer drug, paclitaxel (PTX). The physico- and photochemical properties of the obtained nanorods were carefully investigated. BDP-I₂ was se ...
DOI:
10.1039/c8ra00067k

16. SO₂ enhanced desorption from basic aluminum sulfate desulphurization–regeneration solution by falling-film evaporation

Author:
Huang, Kuo; Deng, Xianhe; He, Feiqiang
Source:
RSC advances 2018 v.8 no.10 pp. 5550-5558
ISSN:
2046-2069
Subject:
aluminum sulfate; desorption; evaporation; heat transfer; heat transfer coefficient; mass transfer; sulfur; sulfur dioxide; temperature
Abstract:
... To find the optimal structure of the converging–diverging tube and develop a high-efficiency falling-film evaporator, the heat and mass transfer performances of falling-film evaporation with converging–diverging tubes of different dimensions were studied. The optimal converging–diverging tube was used in falling-film evaporation desorption of the basic aluminum sulfate desulphurization–regeneratio ...
DOI:
10.1039/c7ra12963g

17. Ag₃PO₄ electrocatalyst for oxygen reduction reaction: enhancement from positive charge

Author:
Qin, Yong; Li, Fan; Tu, Peng; Ma, Yanling; Chen, Wenlong; Shi, Fenglei; Xiang, Qian; Shan, Hao; Zhang, Lifu; Tao, Peng; Song, Chengyi; Shang, Wen; Deng, Tao; Zhu, Hong; Wu, Jianbo
Source:
RSC advances 2018 v.8 no.10 pp. 5382-5387
ISSN:
2046-2069
Subject:
adsorption; catalysts; density functional theory; electrochemistry; oxygen; platinum; silver
Abstract:
... We have demonstrated Ag₃PO₄ as an active non-Pt electrocatalyst with enhanced activity compared with Ag for oxygen reduction reaction (ORR). Density functional theory reveals that better ORR performance of Ag atoms on Ag₃PO₄ surface than that on pure silver surface originates from more appropriate oxygen adsorption on positively charged Ag atoms. Further study of the surface geometry of Ag₃PO₄ inc ...
DOI:
10.1039/c7ra12643c

18. An innovative small molecule for promoting neuroreparative strategies

Author:
Colabufo, Nicola Antonio; Contino, Marialessandra; Cantore, Mariangela; Berardi, Francesco; Perrone, Roberto; Tonazzi, Annamaria; Console, Lara; Panaro, Maria Antonietta; Savolainen, Heli; Luurtsema, Gert
Source:
RSC advances 2018 v.8 no.10 pp. 5451-5458
ISSN:
2046-2069
Subject:
P-glycoproteins; Toll-like receptor 4; active ingredients; cell differentiation; in vivo studies; medicine; neurites; neurodegenerative diseases; sprouting; stem cells
Abstract:
... In this study, a new regenerative strategy to treat several neurodegenerative diseases is suggested by the use of a multitarget approach induced by our small molecule, MC111. Considering the importance of P-gp and BCRP expression on stem cell differentiation and the involvement of TLR4 on neurodegeneration processes, we investigated the effect of MC111, belonging to our library of P-gp active comp ...
DOI:
10.1039/c7ra11812k

19. Comment on “Incipient plasticity of diamond during nanoindentation” by C. Xu, C. Liu and H. Wang, RSC Advances, 2017, 7, 36093

Author:
Goel, Saurav; Stukowski, Alexander
Source:
RSC advances 2018 v.8 no.10 pp. 5136-5137
ISSN:
2046-2069
Subject:
carbon; chemical structure; nanotechnology; plasticity
Abstract:
... A recent molecular dynamics simulation study on nanoindentation of diamond carried out by Xu et al.¹ has reported observation of the presence of a controversial hexagonal lonsdaleite phase of carbon in the indentation area. In this comment, we question the reported observation and attribute this anomaly to shortcomings of the long range bond order potential (LCBOP) employed in the nanoindentation ...
DOI:
10.1039/c7ra12219e

20. Computational method for estimating progression saturation of analog series

Author:
Kunimoto, Ryo; Miyao, Tomoyuki; Bajorath, Jürgen
Source:
RSC advances 2018 v.8 no.10 pp. 5484-5492
ISSN:
2046-2069
Subject:
active ingredients; bioactive properties; bioassays; synthesis
Abstract:
... In lead optimization, it is difficult to estimate when an analog series might be saturated and synthesis of additional compounds would be unlikely to yield further progress. Rather than terminating a series, one often continues to generate analogs hoping to reach the final optimization goal, even if obstacles that are faced ultimately prove to be unsurmountable. Clearly, methodologies to better un ...
DOI:
10.1039/c7ra13748f