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Proceedings Paper

Photophysical properties of some water soluble metal phthalocyanines
Author(s): Xian-Fu Zhang; Jinshi Ma; Huijun Xu
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Paper Abstract

The effect of sulfonation degree on aggregation and photophysical properties of metal phthalocyanines was studied. Absorption and fluorescence spectra showed that association was decreased with the increasing of the sulfonation degree in aqueous solution. Little change was observed for fluorescence quantum yields and lifetime; triplet-triplet absorption and triplet lifetime for phthalocyanines with different degrees of sulfonation. However, the measurement of absolute yields of singlet oxygen in DMSO showed that the degree of sulfonation has a dramatic influence on the ability of photochemical generation of singlet oxygen. Irradiation of oxygenated aqueous solutions (PH10) of tryptophan containing 10 (mu) M sulfonated zinc phthalocyanine and/or specific quenchers of the possible reactive intermediates suggested that photo-oxidation of amino acid was largely proceeded by Type-II mechanism.

Paper Details

Date Published: 5 March 1993
PDF: 6 pages
Proc. SPIE 1616, International Conference on Photodynamic Therapy and Laser Medicine, (5 March 1993); doi: 10.1117/12.137035
Show Author Affiliations
Xian-Fu Zhang, Institute of Photographic Chemistry (China)
Jinshi Ma, Institute of Photographic Chemistry (China)
Huijun Xu, Institute of Photographic Chemistry (China)

Published in SPIE Proceedings Vol. 1616:
International Conference on Photodynamic Therapy and Laser Medicine
Junheng Li M.D., Editor(s)

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