Adsorption and reduction reactions of anthraquinone derivatives on gold electrodes studied with electrochemical surface-enhanced Raman spectroscopy

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	Adsorption and reduction reactions of anthraquinone derivatives on gold electrodes studied with electrochemical surface-enhanced Raman spectroscopy
	Dai, K. ; Huang, R. ; Jiang, R. ; Ke, H. X. ; Li, F. ; Jin, S. ; Wu, D. Y. ; Tian, Z. Q. ; Tian ZQ(田中群)
刊名	http://dx.doi.org/10.1002/jrs.4083
	2012-10
关键词	SELF-ASSEMBLED MONOLAYERS EFFECTIVE CORE POTENTIALS MOLECULAR CALCULATIONS QUANTUM INTERFERENCE SERS SPECTROSCOPY SINGLE-MOLECULE SCATTERING FERROCENE SILVER NANOSTRUCTURES
英文摘要	973 Program [2009CB930703]; NSF of China [20803027, 11074210, 21021002, 21173094]; Electrochemical surface-enhanced Raman spectroscopy (EC-SERS), combined with cyclic voltammetry, and the density functional theoretical (DFT) method were used to investigate self-assembled monolayer (SAM) adsorption and reduction processes. Here, we choose the system of interest, being thiolacetyl-terminated 2-phenylene ethynylene-substituted anthraquinone molecule (2-AQ) on gold electrodes in buffered aqueous and aprotic solutions. In the buffered aqueous solution, the results of cyclic voltammetry and EC-SERS measurements, as well as DFT calculations, indicate that the adsorbed molecules pass through a two-electron two-proton reduction reaction with cathodic polarization. In particular, the latter two methods confirmed the structural changes of SAMs during the process of redox reaction, 2-AQ?+?2e?+?2H+???2-AQH2, where 2-AQ and 2-AQH2 are the oxidized and reduced forms, respectively. In aprotic solutions (acetonitile), a stepwise reaction mechanism was proposed on the basis of the results of EC-SERS and DFT calculations. The first reduction peak should be a half reaction process 2-AQ?+?e???2-AQ-, where 2-AQ- is a single electron reduced form. Compared with that of 2-AQ SAMs in the buffered aqueous solution, the results of EC-SERS and DFT calculations in aprotic solution suggested that the solvent effect significantly influences the redox process of 2-AQ in electrochemical interfaces. Copyright (c) 2012 John Wiley & Sons, Ltd.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/62964]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Dai, K.,Huang, R.,Jiang, R.,et al. Adsorption and reduction reactions of anthraquinone derivatives on gold electrodes studied with electrochemical surface-enhanced Raman spectroscopy[J]. http://dx.doi.org/10.1002/jrs.4083,2012.
APA	Dai, K..,Huang, R..,Jiang, R..,Ke, H. X..,Li, F..,...&田中群.(2012).Adsorption and reduction reactions of anthraquinone derivatives on gold electrodes studied with electrochemical surface-enhanced Raman spectroscopy.http://dx.doi.org/10.1002/jrs.4083.
MLA	Dai, K.,et al."Adsorption and reduction reactions of anthraquinone derivatives on gold electrodes studied with electrochemical surface-enhanced Raman spectroscopy".http://dx.doi.org/10.1002/jrs.4083 (2012).