Electrochemical behavior of N-methyl-N-carboxydecyl-4,4- bipyridinium probed by surface-enhanced Raman spectroscopy

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	Electrochemical behavior of N-methyl-N-carboxydecyl-4,4- bipyridinium probed by surface-enhanced Raman spectroscopy
	Xu, Jian-Fang ; Liu, Guo-Kun ; Liu GK(刘国坤)
刊名	http://dx.doi.org/10.1016/j.saa.2013.05.058
	2013
关键词	Electrochemistry Electrolytic reduction Esterification Esters Molecules Raman spectroscopy Surfaces
英文摘要	Interfacial structure determines the activity and selectivity of a sensor and plays important roles in inter-facial electrochemistry, electroanalysis, biosensing, etc. in situ electrochemical Raman spectroscopy appears to be a powerful tool to probe the electrochemical interface and surface process by providing the molecular fingerprint information. Herein, the electrochemical behaviors of N-methyl-N′-carboxyde-cyl-4,4′-bipyridinium (derivatives of methyl viologens, MV2+) with different alkyl chain lengths (n = 2 and 10) on roughened Au electrodes were systematically investigated by the electrochemical surface-enhanced Raman spectroscopy (SERS). Three systems with different interfacial structures were constructed. One is to anchor the MV2+ molecules via esterification with the 2-mercaptoethanol molecule pre-assembled on the Au surface. The second system is similar to the first one but without esterification. The third system is the direct adsorption of MV2+ molecules on the bare roughened Au surfaces. The three systems gave different spectral response upon the change of the electrode potential. A drastically increased relative Raman intensity of 19a/8a modes of the MV2+ molecules was observed at negative potentials. The phenomenon is attributed to the formation of the reduced form of MV2+ molecules, which produces resonant Raman effect to enhanced the signal of 19a mode. The third system showed the highest electrochemical reduction activity towards the reduction of MV2+ molecules, followed by the first and second systems. The result indicates that the interfacial structure can sensitively influence electrochemical activity of the electrode. ? 2013 Elsevier B.V. All rights reserved.
语种	英语
出版者	Elsevier
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89206]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Xu, Jian-Fang,Liu, Guo-Kun,Liu GK. Electrochemical behavior of N-methyl-N-carboxydecyl-4,4- bipyridinium probed by surface-enhanced Raman spectroscopy[J]. http://dx.doi.org/10.1016/j.saa.2013.05.058,2013.
APA	Xu, Jian-Fang,Liu, Guo-Kun,&刘国坤.(2013).Electrochemical behavior of N-methyl-N-carboxydecyl-4,4- bipyridinium probed by surface-enhanced Raman spectroscopy.http://dx.doi.org/10.1016/j.saa.2013.05.058.
MLA	Xu, Jian-Fang,et al."Electrochemical behavior of N-methyl-N-carboxydecyl-4,4- bipyridinium probed by surface-enhanced Raman spectroscopy".http://dx.doi.org/10.1016/j.saa.2013.05.058 (2013).