非水体系中C_(60)在银电极上的表面增强拉曼光谱研究  

Surface-Enhanced Raman Scattering Studies of C_(60) on Ag Electrodes in Nonaqueous Solution

作　　者：顾伟[1] 孙玉华[1] 顾仁敖[1] 

机构地区：[1]苏州大学化学系,江苏苏州215006

出　　处：《光谱学与光谱分析》2005年第12期1991-1994,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(29873033)资助项目

摘　　要：采用表面增强拉曼光谱(SERS)技术研究了乙腈溶液中C60的悬液在银电极表面的光谱特征,得到 了银电极表面C60团簇和表面吸附C60分子的光谱信息。结果表明,随着所加电势的改变,C60的SERS谱峰强 度和位移皆有所变化。而且由于基底表面电磁场的改变直接影响着C60的分子结构,导致电势正扫和回扫时 的还原电位和氧化电位之间出现400 mV的滞后现象;由于扬-特勒变形的存在使C60分子的对称性降低,而 导致其SERS谱图发生了变化。The spectroscopic characteristics of C60 on Ag electrodes in nonaqueous solution were studied by surface-enhanced Raman scattering （SERS） technique. The potential-dependent SER spectra of the C60 cluster indicate that a difference （about 400 mV） between the oxidation potential and the reduction potential appears when the potential scans negatively and positively. It is explained by that changes of electromagnetic field on Ag influence the structure of C60 molecule greatly. According to the SER spectra of C60 adsorbed on Ag electrodes, it was found that the symmetry of C60 is reduced because of Jahn-Teller distortion, and this decrease causes the changes in its SER spectra.

关 键 词：表面增强拉曼光谱 C60 非水体系 银电极 

分 类 号：O657.3[理学—分析化学]