Laser-flash photolysis of dialkylbenzodipyridoporphyrazines

Keiichi Sakamoto, Eiko Ohno-Okumura, Taku Kato, Tomomi Kawaguchi, Michael J. Cook

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Abstract

In the course of a fundamental study of photosensitizers for Photodynamic therapy of cancer, a non-peripheral substituted phthalocyanine analogue, zinc bis(1,4-didecylbenzo)bis(3,4-pyrido)porphyrazine and its position isomers were examined to measure their photoexcited triplet state lifetimes in poly(methyl methacrylate) film using laser-flash photolysis. The isomer mixture of zinc bis(1,4-didecylbenzo)bis(3,4-pyrido)porphyrazine showed the most intense absorption in the 660-710 nm region, and the longer triplet state lifetime. The lowest symmetry isomer of zinc bis(1,4-didecylbenzo)bis(3,4-pyrido)porphyrazine was found to have the longest triplet state lifetime when all isomers were separated. The compound is proposed to be suitable for use as a photosensitizer for photodynamic therapy of cancer. Copyright (C) 2003 Society of Porphyrins & Phthalocyanines.
Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalJournal of Porphyrins and Phthalocyanines
Volume7
Issue number2
DOIs
Publication statusPublished - 2003

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