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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (11): 1333-1336. 上一篇    下一篇

研究论文

锌电极上2-巯基吡啶自组装单层的原位表面增强拉曼光谱电化学观察

纪佳华，杨海峰*，马晓玲，孙一平，朱璇，宋巍，段国萍   

  1. (上海师范大学化学系 上海 200234)
  • 投稿日期:2007-05-08 修回日期:2008-01-20 发布日期:2008-06-14
  • 通讯作者: 杨海峰

In situ Surface-enhanced Raman Scattering Spectro-electrochemical Observation of 2-Mercaptopyridine Self-assembled Monolayer on Zinc Electrode

JI, Jia-Hua; YANG, Hai-Feng*; MA, Xiao-Ling; SUN, Yi-Ping; ZHU, Xuan; SONG, Wei; DUAN, Guo-Ping   

  1. (Department of Chemistry, Shanghai Normal University, Shanghai 200234)
  • Received:2007-05-08 Revised:2008-01-20 Published:2008-06-14
  • Contact: YANG, Hai-Feng

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906

被引次数

21 | 1

利用原位表面增强拉曼散射(SERS)技术, 观察了2-巯基吡啶在锌电极上单层吸附和脱附行为. SERS实验结果表明, 2-巯基吡啶分子主要通过巯基上的硫原子垂直吸附于锌表面. 原位SERS光谱电化学发现, 当外加电位达到－1.4 V vs. SCE时, 分子开始从表面脱附, 并伴随吸附构型变化, 在－1.6 V时发生完全脱附.

关键词: 锌电极, 2-巯基吡啶, 自组装, 原位表面增强拉曼光谱, 电化学

The adsorption and desorption behavior of 2-mercaptopyridine monolayer on a Zn electrode was observed by surface-enhanced Raman spectroscopy (SERS). The SERS experimental results showed that the 2-mercaptopyridine (2-MPy) was adsorbed on the Zn electrode through S and N atoms leading to its pyridine ring perpendicular with respect to the surface. When the potential reached －1.4 V vs. SCE, the 2-mercaptopyridine molecules tended to depart from the Zn surface along with the change of adsorption mode and were entirely desorbed at －1.6 V vs. SCE.

Key words: zinc electrode, 2-mercaptopyridine, self-assembled monolayer, in-situ surface-enhanced Raman spectroscopy, electrochemistry