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V. L. Ivanov, B. M. Uzhinov, S. Yu. Lyashkevich

The mechanism of fluorescence quenching of riboflavin by nucleophiles


It was shown that the quenching of riboflavin (RF) fluorescence by nucleophiles: sulfite-, nitrite, thiocyanate-, iodide- and bromide-ions proceeds both dynamic and the static mechanism. The rate quenching constants of excited RF by anions and the equilibrium constants of RF in the ground state with anions have been determined. At flash photolysis RF in the presence of small concentrations of nucleophiles the formation of radicals RF was observed.
Moscow University Chemistry Bulletin.
2010, Vol. 51, No. 4, P. 279

Copyright (C) Chemistry Dept., Moscow State University, 2002
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