Fabrication, characterization, electrochemistry, and redox-induced electrochromism of viologen-functionalized silica core-shell nano-composites
文献类型：期刊论文
| 作者 | Wang, Jing1; Wang, Jia-Fei1; Chen, Meng1; Qian, Dong-Jin1; Liu, Minghua2 |
| 刊名 | ELECTROCHIMICA ACTA
 |
| 出版日期 | 2017-10-10 |
| 卷号 | 251页码:562-572 |
| 关键词 | Core-shell Nano-composites Viologen Layer-by-layer Assembly Electrochemistry Electrochromism |
| 英文摘要 | Electroactive viologen-functionalized silica core-shell nano-composites have been prepared and characterized using thermogravimetry, field emission transmission electron microscopy, and infrared, UV-vis absorption, and X-ray photoelectron spectroscopy. The viologen monolayer functionalized nanosilica core (nano-SiO(2)VBen) was obtained via a substitution reaction of propylamine - modified silica nanoparticles (nano-SiO2NH2) with N, N'-di(bromomethylbenzyl)-4,4'-bipyridium dibromide (VBenBr(2)). The nano-SiO(2)VBen core was positively charged and could thus act as a support for the construction of the shell layer of viologen multilayers through, alternatively, the electrostatic adsorption of poly(sodiump- styrenesulfonate) (PSS) and VBenBr(2). Dynamic light scattering and morphological studies revealed that the dynamic sizes of the nanoparticles increased in the following order: nano-SiO2NH2, nano-SiO(2)VBen, and nano-SiO(2)VBen@(PSS/VBen)n. This was due to the assembly of organic multilayers around the nanoparticles and formation of aggregates. Cyclic voltammograms of nano-SiO(2)VBen-and nanoSiO(2)VBen@(PSS/VBen) n-modified electrodes showed two couples of redox waves in the potential range from 0 to - 1.2V (vs Hg/Hg2Cl2), corresponding to the redox processes of viologens in the nanocomposites. Compared to their precursor of VBenBr(2), the nano-SiO(2)Ben and nano-SiO(2)VBen@(PSS/VBen) n composites could be more strongly adsorbed on the electrode surface without co-adsorption of the polymeric supporter (Nafion), which can be attributed to a stronger molecular interaction between the present nano-composites and electrode surfaces. Finally, the redox-induced electrochromic properties of VBenBr(2) and nano-composites were investigated in the solutions or polymer gel electrolytes, and the results suggest that both viologen organic electrolyte and nano-composites could act as potential candidates for the development of redox-based electrochromic indicators and displays. (C) 2017 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/41296]  |
| 专题 | 化学研究所_胶体、界面与化学热力学实验室 |
| 作者单位 | 1.Fudan Univ, Dept Chem, 220 Handan Rd, Shanghai 200433, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Colloid Interface & Chem Thermodynam, Inst Chem, 2 Zhongguancun Beiyijie, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jing,Wang, Jia-Fei,Chen, Meng,et al. Fabrication, characterization, electrochemistry, and redox-induced electrochromism of viologen-functionalized silica core-shell nano-composites[J]. ELECTROCHIMICA ACTA,2017,251:562-572. |
| APA | Wang, Jing,Wang, Jia-Fei,Chen, Meng,Qian, Dong-Jin,&Liu, Minghua.(2017).Fabrication, characterization, electrochemistry, and redox-induced electrochromism of viologen-functionalized silica core-shell nano-composites.ELECTROCHIMICA ACTA,251,562-572. |
| MLA | Wang, Jing,et al."Fabrication, characterization, electrochemistry, and redox-induced electrochromism of viologen-functionalized silica core-shell nano-composites".ELECTROCHIMICA ACTA 251(2017):562-572. |
入库方式： OAI收割
来源：化学研究所
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