银电极上2-巯基吡啶和4-巯基吡啶自组装单层的原位表面增强拉曼光谱电化学  

In-situ Electrochemical Surface-enhanced Raman Spectroscopy of 2-Mercaptopyridine and 4-Mercaptopyridine Self-Assembled Monolayer on Silver 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] 章宗穰[1] 

机构地区：[1]上海师范大学化学系,上海200234

出　　处：《光散射学报》2008年第3期227-231,共5页The Journal of Light Scattering

基　　金：上海市自然科学基金(06JC14094);上海市教委重点基金(06ZZ18)

摘　　要：利用原位表面增强拉曼散射(SERS)技术,分别观察了2-巯基吡啶和4-巯基吡啶在银表面自组装单层的电化学行为。实验结果表明,随着电位的负移,2-巯基吡啶和4-巯基吡啶分子在银表面均呈现出先倾斜再垂直然后倾斜的吸附取向改变过程。但发生完全脱附的电位则有所不同。The electrochemical behaviors of 2 - mercaptopyridine （2 - MPy） and 4 - mercapto - pyridine （4 - MPy） monolayers at Ag electrode were studied by in - situ Surface - enhanced Raman Spectroscopy （SERS）. Results shown that both 2 - MPy and 4 - MPy molecules experienced the change of adsorption orientation with the varied applied potentials. Both of them were entirely desorbed from the surface at their own critical potential.

关 键 词：巯基吡啶 银电极 自组装 表面增强拉曼光谱 原位光谱电化学 

分 类 号：O433.54[机械工程—光学工程]