Photophysical properties of some water soluble metal phthalocyanines

Xian-Fu Zhang; Jinshi Ma; Huijun Xu

doi:10.1117/12.137035

5 March 1993 Photophysical properties of some water soluble metal phthalocyanines

Xian-Fu Zhang, Jinshi Ma, Huijun Xu

Proceedings Volume 1616, International Conference on Photodynamic Therapy and Laser Medicine; (1993) https://doi.org/10.1117/12.137035
Event: International Conference on Photodynamic Therapy and Laser Medicine, 1991, Beijing, China

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.

Citation Download Citation

Xian-Fu Zhang, Jinshi Ma, and Huijun Xu "Photophysical properties of some water soluble metal phthalocyanines", Proc. SPIE 1616, International Conference on Photodynamic Therapy and Laser Medicine, (5 March 1993); https://doi.org/10.1117/12.137035

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