Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 72, Issue 2-3, Pages 119-124Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2004.09.007
Keywords
radiolysis; hydroxyl radical; hydroxycoumarin; umbelliferone; fluorescence; reverse-phase chromatography
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Aqueous solutions of coumarin have been used to detect the hydroxyl radicals produced as a result of gamma a radiolysis. Reverse-phase chromatography and fluorescence measurements show that the 7-hydroxycoumarin (umbelliferone) is produced. The hydroxycoumarin isomers of 3OH-, 4OH-, 5OH-, 6OH- and 8OH-coumarin are also produced although the fluorescence emission of these products is negligible compared to that of 7-hydroxycoumarin. The radiation chemical yield of 7-hydroxycournarin has been studied in different gas conditions. (C) 2004 Elsevier Ltd. All rights reserved.
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