摘要
本文给出了1—苯基—5—巯基四氮唑(PMT)和2—巯基苯骈噻唑(MBT)固体的普通拉曼谱(NRS)以及它们吸附在金属银溶胶上的表面增强拉曼谱(SERS).研究了卤素离子对PMT和MBT在银溶胶颗粒表面上吸附的竞争抑制作用和羟基离子时PMT和MBT在银溶胶上吸附的不同影响. 在实验的基础上,本文提出了PMT可能通过分子上的N原子和酸原子吸附在金属银溶胶颗粒上,而MBT通过巯基上的S原子与金属银溶胶发生作用的假设.作为本底的金属银溶胶和吸附物之间的结合力的强弱与吸附物分子上与吸附本底起作用的原子的极化率的大小相关.
The surface enhanced Raman spectra (SERS) of 1-phenyl-5-mercaptotetrazole (PMT) and 2-mercaptobenzothiazole (MBT) adsorbed on silver sol and the normal Raman spectra of their solid (NRS) were reported. It was supposed that both N and S atoms of PMT are involved in adsorption. However, MBT may be adsorded on silver through the S atom of the mercapto group.The influences of halide ions on the adsorption were investigated. It was found that in the adsorption halide ions competed with PMT and MBT.The difference of effects of hydroxyl ions on the adsorption of PMT and MBT was discussed. It was suggested that the boding force between the silver substrate and adsorbates seems to be dependent on the polarizability of the latter.
基金
国家自然科学基金
