Electrochemical Behavior and Antioxidant and Prooxidant Activity of Natural Phenolics

Molecules

Aleksandra Simić²  Dragan Manojlović¹  Dejan ᘎgan² 

[1] Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; E-mails

关键词: Phenolics;    cyclic voltammetry;    antioxidant activity;    prooxidant activity;   

DOI  :  10.3390/12102327

来源: mdpi

【 摘 要 】

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.

【 授权许可】

Unknown   
© 2007 by MDPI (http://www.mdpi.org).