［5，10，15，20］－四取代苯基卟啉氯化锰配合物紫外－可见光谱的研究

Studies on UV-Vis Spectra of [5,10,15,20]-Substituted Tetrakisphenyl Porphyrin Chlorated Manganese Complexes

测定了１８个新合成的四取代苯基卟啉氯化锰的紫外－可见光谱，对主要吸收峰作了归属，指定了ＣＴ带，研究了样品在四氢呋喃溶剂中２２０ｎｍ附近吸收带的浓度效应和在四氢呋喃、三氯甲烷、二氯甲烷、乙醇中的溶剂效应及取代基效应。结果表明，除ｏ－Ｍｅ、ｐ－Ⅰ取代苯基卟啉锰外，２２０ｎｍ附近吸收带随测试溶液浓度增加，λ_（ｍａｘ）红移；随测定溶剂极性（ｐ值）增加，λ_（ｍａｘ）蓝移。

The UV-Vis spectra of eighteen [5, 10, 15, 20]-Substituted tetrakisphenyl porphyrin manganese chlorated complexes have been measured and their main bands were assigned. The concentration and solvent effects have also been studied which indicate that the Pπ(Cl)→π* bands undergo a gradual red shift as the concentration of the solution increases and a blue shift as the polarity of the solvent increases. Based on the dipole-dipole interaction with polar solvent, these effects can be understood by realizing that in Pπ(Cl)-π* transitions the ground state is more polar than the excited state. In addition, the linear relation between the λ_(max) values of p-substituted phenyl porphyrints and Hammett constant has been observed.