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PHOTOIONISATION AND BIPHOTONIC PROCESSES OF NUCLEIC ACIDS DERIVATIVES IN FROZEN SOLUTIONS
Author(s) -
Hélène Claude,
Santus René,
Douzou Pierre
Publication year - 1966
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.1751-1097.1966.tb05767.x
Subject(s) - chemistry , nucleic acid , guanosine , photochemistry , purine , radical , aqueous solution , molecule , population , adenosine , phosphorescence , triplet state , organic chemistry , biochemistry , physics , demography , quantum mechanics , sociology , fluorescence , enzyme
— In frozen aqueous solutions at 777deg;K, U.V. irradiation (Λ>250 mμ) photoionises purine, adenosine and guanosine molecules, respectively, In alcoholic solutions, at 777deg;K, photosensitization of alcohol occurs. A biphotonic absorption process involving the lowest triplet state is suggested. The formation of radicals by these processes leads to a decrease of the phosphorescent triplet‐state population of the molecules tested. Some consequences for the photochemistry of nucleic acids are discussed.