2,2'-联吡啶与锌电极作用的表面增强拉曼光谱研究  

Study on the Interaction of 2,2′-bipyridine and Zn Electrode by Surface-enhanced Raman Spectroscopy

作　　者：顾仁敖[1] 沈晓英[1] 王梅[1] 

机构地区：[1]苏州大学化学系,苏州215006

出　　处：《物理化学学报》2005年第10期1117-1121,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(29873033)资助项目~~

摘　　要：利用表面增强拉曼光谱(SERS)对2,2'-联吡啶分子在锌电极表面的吸附进行了研究.实验表明,2,2'-联吡啶和锌电极有较强的相互作用,2,2'-联吡啶和锌表面的氧物种存在竞争吸附,起始电位较正时,氧物种的吸附使2,2'-联吡啶吸附电位负移;起始电位较负时,2,2'-联吡啶的吸附抑止氧物种的吸附,使其吸附电位正移,且相同电位下氧化种的吸附量大大减少.同时当电极电位由正往负移时,吸附在锌表面的2,2'-联吡啶会发生构型转化,在-1.3V下以顺式构型垂直吸附,而当电位负移至-1.4V时则以反式构型吸附;而电极电位由负往正移时,在研究电位区间内2,2'-联吡啶都以反式构型吸附,不存在构型的转化.Surface enhanced Raman spectroscopy （SERS） was employed to study the adsorption of 2,2＇-bipyridine （2,2＇-biPy） on an electrochemical roughened Zn electrode. The results suggested that 2,2＇-biPy adsorbed on Zn electrode with relatively strong interaction. For a relative positive initial potential, the potential of the 2,2＇-biPy adsorption was negatively moved because of the adsorption of Zinc oxide species, while at a relative negative potential, the adsorption of 2,2＇-biPy blocked the adsorption of oxygen species, and thus the 2,2＇-biPy and oxygen species exhibited a competitive adsorption on Zn electrode. Moreover, the adsorption configuration of 2,2＇-biPy was dependent onthe applied potential. It was adsorbed through cis conformation to the surface at -1.3 V, while through trans conformation at -1.4 V.

关 键 词：锌电极 2 2’-联吡啶 表面增强拉曼光谱 吸附 构型转化 

分 类 号：O626.32[理学—有机化学]