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Open Access Green as soon as Postprint is submitted to ZB.
Radical scavenging by flavonoid antioxidants.
Free Radic. Res. 2, 289-294 (1987)
Aroxyl radicals of fifteen structurally distinct flavonoids were generated by attack of azide radicals (N3) on the parent compounds dissolved in aqueous solution at pH 11.5. Generation rate constants were all found to be very high (2.4 - 8.8 × 109dm3mol-1s-1), whereas the decay rates differed considerably, ranging from 105 to 108dm3mol-1s-1. In most cases the spectral characteristics of the transient aroxyl radicals relate to structural features of the parent compounds and according to spectral similarities they can be classed in three distinct groups (with only two exceptions). Although the data do not conclusively prove that the biological function of flavonoids might be the scavenging of radicals, the very high rate constants of formation and the relative stability of some of the aroxyl radicals, are in support of such a hypothesis.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Aroxyl Radicals ; Azide Radicals ; Flavonoids ; Pulse Radiolysis ; Rate Constants ; Transient Spectra
ISSN (print) / ISBN
1071-5762
e-ISSN
1029-2470
Journal
Free Radical Research
Quellenangaben
Volume: 2,
Issue: 4-6,
Pages: 289-294
Publisher
Taylor & Francis
Reviewing status
Peer reviewed
Institute(s)
Abteilung für Strahlenbiologie und Biophysik