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  

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

作　　者：纪佳华[1] 杨海峰[1] 马晓玲[1] 孙一平[1] 朱璇[1] 宋巍[1] 段国萍[1] 

机构地区：[1]上海师范大学化学系,上海200234

出　　处：《化学学报》2008年第11期1333-1336,共4页Acta Chimica Sinica

基　　金：上海市科委基础研究重点基金(No.06JC14094);上海市教委重点研究基金(No.06ZZ18);湖南大学化学生物传感器与计量学国家重点实验室开放基金(No.2006012)资助项目.

摘　　要：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-1.4Vvs.SCE时,分子开始从表面脱附,并伴随吸附构型变化,在-1.6V时发生完全脱附.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.

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 

分 类 号：O647.3[理学—物理化学]