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Cited by 294

The DOI matches its Crossref record; 63 of the 63 references it cites were found in a registry or an index.

Free Radical Scavenging by Natural Polyphenols: Atom versus Electron Transfer

Di Meo, Florent, Lemaur, Vincent, Cornil, Jérôme, Lazzaroni, Roberto, Duroux, Jean-Luc, Olivier, Yoann, Trouillas, Patrick·2013·The Journal of Physical Chemistry A

Abstract

Polyphenols (synthetically modified or directly provided by human diet) scavenge free radicals by H-atom transfer and may thus decrease noxious effects due to oxidative stress. Free radical scavenging by polyphenols has been widely theoretically studied from the thermodynamic point of view whereas the kinetic point of view has been much less addressed. The present study describes kinetic-based structure-activity relationship for quercetin. This compound is very characteristic of the wide flavonoid subclass of polyphenols. H-atom transfer is a mechanism based on either atom or electron transfer. This is analyzed here by quantum chemical calculations, which support the knowledge acquired from experimental studies. The competition between the different processes is discussed in terms of the nature of the prereaction complexes, the pH, the formation of activated-deprotonated forms, and the atom- and electron-transfer efficiency. The role of the catechol moiety and the 3-OH group of quercetin as scavengers of different types of free radicals (CH3OO(•), CH3O(•), (•)OH, and (•)CH2OH) is rationalized. Identifying the exact mechanism and accurately evaluating kinetics is of fundamental importance to understand antioxidant behavior in physiological environments.

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Crossref · 10.1021/jp3116319

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Metadata

Authors
Di Meo, F., Lemaur, V., Cornil, J., Lazzaroni, R., Duroux, J.-L., Olivier, Y., & Trouillas, P.
Venue
The Journal of Physical Chemistry A
Published
2013-03-05
Volume
117
Issue
10
Pages
2082-2092
ISSN
  • 1089-5639 (ISSN-L)
  • 1520-5215
OpenAlex
W2325469858
Cited by
294
References
63
FWCI
10.09
Type
journal article
Language
en
Open access
closed

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