Journal
MOLECULES
Volume 12, Issue 10, Pages 2327-2340Publisher
MOLECULAR DIVERSITY PRESERVATION INT
DOI: 10.3390/12102327
Keywords
phenolics; cyclic voltammetry; antioxidant activity; prooxidant activity
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We have investigated the electrochemical oxidation of a number natural phenolics ( salicylic acid, m-hydroxybenzoic acid, p-hydroxybenzoic acid, protocatechuic acid, o-coumaric acid, m-coumaric acid, p-coumaric acid, caffeic acid, quercetin and rutin) using cyclic voltammetry. The antioxidant properties of these compounds were also studied. A structural analysis of the tested phenolics suggests that multiple OH substitution and conjugation are important determinants of the free radical scavenging activity and electrochemical behavior. Compounds with low oxidation potentials (Epa lower than 0.45) showed antioxidant activity, whereas compounds with high Epa values (> 0.45) act as prooxidants.
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