金属/乙腈界面微量水的增强拉曼光谱  

Surface-enhanced Raman Spectroscopy of Water at Metal/acetonitrile Interface

作　　者：孙玉华[1] 曹佩根[1] 陈惠[1] 顾仁敖[1] 姚建林[2] 田中群[2] 

机构地区：[1]苏州大学化学系,苏州215006 [2]厦门大学固体表面物理化学国家重点实验室化学系,厦门361005

出　　处：《光散射学报》2002年第4期205-207,共3页The Journal of Light Scattering

基　　金：国家自然科学基金资助项目 (编号 :2 98730 33)

摘　　要：本文概述了我们最近利用表面增强拉曼散射技术研究金属 /乙腈界面区痕 /微量水分子的界面行为所取得的进展。研究表明银电极双电层中存在多种吸附模式下的水分子结构。处于非水环境下的水分子的νO H与水系相比存在明显的差别。水分子间的氢键被不同程度地破坏导致几种模式下的水分子νO H均要高于水体系。铂电极表面的研究表明水分子的介入很大程度上限制了铂表面乙腈分子的解离吸附反应。The progress on the study of the adsorption behavior of trace water at the interface of metal/acetonitrile as a function of applied potential by using surface-enhanced Raman scattering (SERS) was briefly reviewed in this paper. Results show that several adsorption modes of water exist in the electrochemical double layer of silver. There are great differences between the nonaqueous acetonitrile system and aqueous one on the frequency of the vibration of ν O-H, whose value is higher in nonaqueous system. Potential-dependent SER spectra obtained from Pt electrodes show that the addition of water with a certain concentration inhibited greatly the dissociation reaction of acetonitrile at the interface.

关 键 词：金属/乙腈界面 微量水 表面增强拉曼散射 银电极 铂电极 界面行为 电化学 解离 吸附 水体系 

分 类 号：O646.5[理学—物理化学] O623.[理学—化学]