The Effects of Substituents at Phenyl Ring of Tetraphenylporphyrins on Intramolecular Energy Transfer of Zinc-metal-free Porphyrin Dimers

Abstract

Abstract: Two new zinc-metal-free bis-porphyrin dimers linked by a flexible alkoxy chain were synthesized.Their absorption spectra and steady-state fluorescence spectra show the existence of intramolecular energy transfer processes in these porphyrin dimers and the efficiency of the intramolecular energy transfer of the porphyrin dinner with electron-donating substituents at .meso-po-sition of phenyl of metal-free porphyrin is greater than that of the dimer with electron-withdrawing substituentes.It seems that the porphyrin dimer with a -OCH₃ group at weso-position of phenyl of porphyrin is a better model of biological photosynthetic reaction.

Key words: Porphyrin dimer, Intramolecular energy transfer, Fluorescence spectra

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HUANG Jin-wang, TAN Qiao, QIN Xia, JI Liang-nian . The Effects of Substituents at Phenyl Ring of Tetraphenylporphyrins on Intramolecular Energy Transfer of Zinc-metal-free Porphyrin Dimers[J]. Chem. J. Chinese Universities, 1992, 13(1): 115.

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The Effects of Substituents at Phenyl Ring of Tetraphenylporphyrins on Intramolecular Energy Transfer of Zinc-metal-free Porphyrin Dimers

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