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.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
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
