苯并噻唑类化合物在银上的吸附机理研究

本文利用线性电势扫描的方法研究了几种苯并噻唑类化合物及巯基苯基四氮唑在银上的吸附机理。结果表明:2.巯基苯并噻唑和巯基苯基四氮唑以化学吸附方式,通过分子上巯基与银表面的作用形成分子紧密排列的吸附层。25℃下,PMT可以在银表面形成紧密单层。这种吸附在较高吸附温度下可以转化为多层,且完全覆盖银表面。在含Br~-的溶液中,它可以阻碍Br~-与表面的接触。在较大的浓度下,2-甲基苯并噻唑和苯并噻唑也可以在银表面的某些位置,通过杂环上的S原子(或N原子)形成松散的吸附,但这种吸附层不能完全覆盖银表面。电镜实验也表明以上物质在银表面发生了作用。

THE MECHANISITIC STUDY OF THE ADSORPTION OF SEVERAL DERIVATIVES OF BENZOTHIAZOLE ON SILVER

The adsorption of several derivatives of benzothiazole and phenyl mercaptotetrazole on silver was investigated by linear sweep voltammetry. It is found that 2-mercaptobenzothiazole and phenyl mercaptotetrazole can chemisorbed on silver surface through mercapto group to form a closely covered layer. A loose adsorbed layer of 2-methyl benzothiazole (or benzothiazole) on silver was also found when the concentration is relatively high. The S and N atoms on heterocyclic ring were suggested to be the reaction sites with silver surface.The interaction between silver surface and above compound was also substantiated by the results of scanning electron microscope investigations.