THE INFLUENCE OF MOLECULAR CHAIN STRUCTUREON STABILITY AGAINST PHOTOOXIDATION OFNEAR-INFRARED ABSORBING CYANINE DYES

doi:10.7517/j.issn.1674-0475.1997.04.343

Abstract

Abstract: The spectroscopic properties and photostability of six near-infrared absorbing cyanine dyes with indolenine and quinoline heterocyclic stem nuclei structure have been studied. The experimental results showed that photofading of cyanine dyes was mainly caused by photooxidation, and their photostability increased significantly when the cyclic unity was introduced into the polymethine chain, and their photostability decreased when the length of polymethine chain was increased.The formation of singlet oxygen and superoxide radical photosensitized was detected by spin-trapping experiment.

Key words: cyanine dyes, photooxidation, singlet oxygen, superoxide anion

LI Jun, CHEN Ping, ZHAO Jiang, ZHENG Deshui, TSUNEKI Okazaki, MASAAKI Hayami. THE INFLUENCE OF MOLECULAR CHAIN STRUCTUREON STABILITY AGAINST PHOTOOXIDATION OFNEAR-INFRARED ABSORBING CYANINE DYES[J]. Imaging Science and Photochemistry, 1997, 15(4): 343-350.

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