金属四苯基卟啉在氧化银和银胶体上的表面增强拉曼光谱研究

研究了四苯基卟啉金属配合物（MTPP；M＝Ag,Cu,Pd,Mg)和游离碱（H2TPP）在氧化银和银胶体中的表面增强拉曼光谱（SERS），在Ag2O胶体中MTPP和H2TPP的SERS谱与其普通拉曼谱明显不同，可知吸附分子在Ag2O胶粒表面发生反应所引起的，况且产物于460nm附近有一强烈吸收，可知它含有共扼双吡咯发色团，在OH^-修饰的银胶上也观察到类似的光谱变化。

Surface-Enhanced Raman Spectroscopy of Metallotetraphenyl-porphyrins Adsorbed on Ag2O and Silver Colloids

The biological significance of porphyrins and metalloporphyrins has stimulated intensive investigations on these compounds for many years. On the other hand, porphyrins and metalloporphyrins also have extensive applications in many other fields such as chemical modified electrodes, organic photovoltaic devices and biomimetic catalysis. The adsorption behavior and chemical reactions of metalloporphyrins on surfaces or interfaces are very important for these applications. Surface-enhanced Raman spectroscopy has been used to investigate the physical and chemical processes of the porphyrins on surfaces in many scientific publications. Surface-reactions such as metalization, demetalization, aggregation, electrochemical redox and N-protonation of the porphyrins on colloids, electrodes or films have been revealed by SERS［1,2, 6］.