金电极表面皮考酸的紫外拉曼散射  

Ultraviolet Raman study of picolinic acid on the gold electrode

作　　者：张星[1] 郝艳玲[1] 

机构地区：[1]兴义民族师范学院物理系,贵州兴义562400

出　　处：《河北大学学报（自然科学版）》2013年第6期578-582,共5页Journal of Hebei University(Natural Science Edition)

基　　金：贵州省教育厅自然科学研究资助项目(20090099);黔西南州科技局科技计划项目(2012-2);兴义民族师范学院科研资助项目(11xyyz04)

摘　　要：以皮考酸作为探针分子,在粗糙金电极表面获得了探针分子的紫外拉曼散射光谱(激发光波长λ=325nm),通过与未经粗糙化处理的金电极表面的皮考酸分子的拉曼散射谱比较,认为皮考酸分子在粗糙金电极表面产生了较强的SERS(表面增强拉曼散射)效应.随电极电位变化的拉曼散射谱表明:皮考酸分子的振动频率和强度对电极电位有较强的依赖性,分析认为皮考酸分子在粗糙金电极表面的增强机制主要是电荷转移(CT)机制.Ultraviolet（λ=325nm）Raman spectrum of picolinic acid molecular adsorbed on the rough- ened Au electrode is recorded.Comparison with the Raman spectrum of picolinic acid on the unroughened Au electrode,one can find that the roughened Au electrode has obvious SERS effect.The potential-de- pendent Raman spectra demonstrate that the Raman shift and intensity of picolinic acid are changed in- tensely with the negative shift of the applied potential.According to the experiment phenomena,the main SERS mechanism of this experiment is charge transfer（CT）mechanism.

关 键 词：紫外拉曼散射光谱 皮考酸 吸附 金电极 

分 类 号：O657.37[理学—分析化学]