Electronic Spectra of π Ion-radical Dimer of Porphyrin Derivatives

Abstract

Abstract: The electronic spectra of Kion-radical dimer of porphyrin derivatives were studiedbased on the spectroelectrochemistry of copper (Ⅱ)meso-tetrakis (4-N-methylpyridyl) por-phyrin tetrachloride salt(CuTMPyP) and the fluorescence spectra of partly protonized 5, 10,15-(4-hydroxy phenyl)-20-(4-hexadecyloxy phenyl) porphyrin (P₃₁) LB film.The face-to-face dimer formed through the SOMO'-LUMOinteraction between the electroreducedCuTMPyPanion-radical and the ground state molecule shows Qband at 480 nm and π^*-π^*band at 820 nm.The face-to-face dimer produced by the SOMO-HOMOinteraction betweenthe protonized P₃₁ cation-radical and the ground state molecule shows the Qband absorptionat the range of 470-515 nm; and the π-π band at 710 nm.These Qbands are blue-shifted.

Key words: Porphyrin derivative, &pi, ion-radical, Dimer-interaction, Spectroelectrochemistry, Fluorescence spectrum

CLC Number:

O433.4

TrendMD:

JIANG Yue-Shun, YANG Ji-Hua, WANG De-Jun, CHEN Yong-Mei, YANG Wen-Sheng, BAI Yu-Bai, LI Tie-Jin, WANG Yong-Qiang. Electronic Spectra of π Ion-radical Dimer of Porphyrin Derivatives[J]. Chem. J. Chinese Universities, 1997, 18(12): 2034.

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Electronic Spectra of π Ion-radical Dimer of Porphyrin Derivatives

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