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V. L. Ivanov, B. M. Uzhinov, S. Yu. Lyashkevich
The
mechanism of fluorescence quenching of riboflavin by nucleophiles
Abstract
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.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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