苯并三唑表面配位化学的电化学现场拉曼光谱研究

用电化学现场表面增强拉曼光谱(SERS)研究了非水体系中苯并三唑(BTAH)在银电极表面的吸附及成膜行为,结果表明非水体系中BTAH的吸附行为随电位变化而不同.较负区间主要以中性分子形式吸附;中间电位区间主要以BTA-吸附并不可逆成膜.采用直接电化学合成技术模拟电极表面过程制备了苯并三唑与Cu,Ag,Fe,Ni和Zn等金属的配合物,并研究了中性配体三苯基膦(pph3)对其配位过程的影响,所得产物的元素分析以及拉曼光谱研究表明pph3的加入影响了Cu和Ag与BTAH的配位过程,并出现在最终产物中,而对BTAH与Ni,Fe和Zn的配位过程未产生影响,产物未出现pph3.

Surface Coordination Chemistry of Benzotriazole Probed by Electrochemical Raman Spectroscopy

The surface coordination chemistry of benzotriazole(BTAH) at silver electrode was investigated by in situ electrochemical surface enhanced Raman spectroscopy(SERS) and electrochemical synthesis in the acetonitrile solution.In situ SERS studies revealed that BTAH underwent three processes of chemical adsorption of BTAH,formation of compact layer of((AgBTA)_n) and the loss of SERS activity due to the oxidation of silver.The surface coordination processes of BTAH with Cu,Ag,Zn,Ni and Fe were investigated and the surface complexes prepared by direct electrochemical synthesis method were characterized by microanalysis and Raman spectroscopy.The influence of the neutral ligand of triphenylphosphine(pph_3) on the coordination process was deduced.The introduction of pph_3 was found to affect the surface processes of BTAH with Cu and Ag,and appeared in the final complex,while it had no influence on the coordination of BTAH with Zn,Ni and Fe.