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.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
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.
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
zinc electrode
2-mercaptopyridine
self-assembled monolayer
in-situ surface-enhanced Raman spectroscopy
electrochemistry
