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- W2085454968 abstract "The photochemistry of several fluoroquinolone antibiotics (FQs). including enoxacin (ENX), norfloxacin (NFX). and ciprofloxacin (CPX), have been investigated in neutral aqueous solution by laser flash photolysis and pulse radiolysis Transient absorption spectra of FQs were observed and transient species were assigned The absorption maxima (lambda(max)) of triplet states of ENX. NFX and CPX were located at 520 nm, X 620 nm and 610 nm, respectively. The radical anions of FQs were characterized by lambda(max) = 370 nm Reactions of the FQ triplet states with amino acids (tyrosine [TyrOH]. tryptophan [TipH], glycine [Gly] and cysteine [CyS]) were investigated in different conditions. All three FQ triplet states can oxidize TrpH and TyrOH. The FQ radical anions and oxidized radicals of TrpH (Trp(center dot)) and TyrOH (TyrO(center dot)) were directly observed. Under aerobic conditions, the photooxidation of TrpH and TyrOH involves both Type I and Type II mechanisms. There were no distinct quenching reactions of the FQ triplet states by Gly and Cys in N(2)-saturated aqueous solutions (C) 2010 Elsevier B.V All rights reserved." @default.
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- W2085454968 date "2010-09-01" @default.
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- W2085454968 title "Transient species of several fluoroquinolones and their reactions with amino acids" @default.
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- W2085454968 doi "https://doi.org/10.1016/j.jphotochem.2010.08.017" @default.
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