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KYNURENIC ACID — II. PHOTOSENSITIZING PROPERTIES
Author(s) -
Pileni M. P.,
Giraud M.,
Santus R.
Publication year - 1979
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1979.tb07144.x
Subject(s) - kynurenic acid , singlet oxygen , chemistry , photochemistry , reactivity (psychology) , flash photolysis , tryptophan , nucleic acid , spectroscopy , oxygen , biophysics , amino acid , biochemistry , organic chemistry , reaction rate constant , kinetics , biology , medicine , physics , alternative medicine , pathology , quantum mechanics
— The photosensitizing properties of kynurenic acid have been studied by 353 nm laser flash spectroscopy and steady state irradiations. Laser flash spectroscopy indicates that the kynurenic acid triplet is reduced by amino acids and nucleic acid bases. Photoreactions implying singlet oxygen formation are shown to occur. The photosensitized destruction of tryptophan which does not involve singlet oxygen is very efficient and shows specific features. Chemical and biological implications of this photo‐reactivity are discussed.