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

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (4): 532.

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

LI Song-Lan, LIAO Dai-Zheng, LIANG Shu-Sen, ZHOU Yi-Ming, ZHU Shen-Jie

Department of Chemistry, Nankai University, Tianjin, 300071

Received:1993-04-21 Revised:1994-01-03 Online:1994-04-24 Published:1994-04-24

Abstract

Abstract: 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.

Key words: UV-Vis spectra, CT band, Concentration effect

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LI Song-Lan, LIAO Dai-Zheng, LIANG Shu-Sen, ZHOU Yi-Ming, ZHU Shen-Jie. Studies on UV-Vis Spectra of [5,10,15,20]-Substituted Tetrakisphenyl Porphyrin Chlorated Manganese Complexes[J]. Chem. J. Chinese Universities, 1994, 15(4): 532.

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

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