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PHOTOLYSIS MECHANISM OF AQUEOUS TYROSINE UPON EXCITATION OF THE SECOND ABSORPTION BAND
Author(s) -
Shimizu Okiyasu
Publication year - 1984
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.1751-1097.1984.tb03883.x
Subject(s) - photochemistry , chemistry , photodissociation , excited state , aqueous solution , absorption band , tyrosine , absorption (acoustics) , excitation , absorption spectroscopy , bond cleavage , cleavage (geology) , atomic physics , materials science , optics , catalysis , organic chemistry , physics , biochemistry , composite material , quantum mechanics , fracture (geology)
— The formation mechanism of tyrosinyl radical was studied for aqueous solutions of tyrosine under irradiation at 235 nm which falls into the second absorption band. The work is based upon the analysis of the rate of bityrosine production for steady‐state excitation at low intensity. The results indicate that monophotonic O‐H bond cleavage of tyrosine, presumably involving the upper excited triplet state, is the initial photoprocess leading to the tyrosinyl radical when tyrosine is excited into the second absorption band.