非水体系中金电极表面增强拉曼光谱研究新进展  

New Progress of Surface Enhanced Raman Spectroscopic Studies on a Gold Electrode in a Nonaqueous System

作　　者：顾仁敖[1] 曹文东[1] 曹佩根[1] 孙玉华[1] 姚建林 任斌 田中群 

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

出　　处：《光谱学与光谱分析》2001年第3期308-310,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金;厦门大学固体表面物理化学国家重点实验室开放课题资助项目

摘　　要：利用共焦显微拉曼系统 ,进行了甲醇溶液中硫氰酸根离子 (SCN-)在金电极上吸附行为的表面增强拉曼光谱 (SERS)研究 ,结果表明 :SCN-与电极之间的相互作用非常强烈 ,在整个研究电位范围内都可以检测到其SERS信号。在 - 0 1V～ - 0 6V区间内 ,SCN-主要是以S端吸附在电极表面 ;而在 - 0 7V～ - 1 2V区间内 。Based on a highly sensitive new generation confocal microprobe Raman system, the adsorption behavior of thiocyanate (SCN-) on a gold electrode in methanol solution was investigated by SERS for the first time. Preliminary results demonstrated that the interaction between SCN- and the electrode is so strong that its SERS signal can be detected in the whole research potential region (-0.1 V- -1.4 V). The orientation change may occur in the potential range -0.6 V-0.7 V. From -0.1 V to - 0.6 V SCN- is adsorbed mainly through S end onto Au surface while in the potential range of -0.7 V to -1.2 V it is oriented mainly through N end. The potential dependence of the Raman frequency of v(CN) resulted in two different values of electrochemical Stark effect, suggesting the existence of molecular orientation change.

关 键 词：非水体系 金电极 表面增强拉曼散射 甲醇 电化学 硫氰酸根离子 吸附 拉曼光谱 

分 类 号：O646.5[理学—物理化学]