Oxidation of cumene hydroperoxide on glassy carbon electrodes in aqueous solution and its interaction with ascorbic and gallic acids

被引：4

作者：

Estevez, Rafael ^{[1
]}

Rodriguez Mellado, Jose Miguel ^{[1
]}

Mayen, Manuel ^{[2
]}

机构：

[1] Univ Cordoba, Dept Quim Fis & Termodinam Aplicada, IUIQFN, E-14014 Cordoba, Spain

[2] Univ Cordoba, Dept Quim Agr & Edafol, E-14014 Cordoba, Spain

来源：

ELECTROCHIMICA ACTA | 2015年 / 185卷

关键词：

Electrochemical oxidation; cumene hydroperoxide; voltammetry; ntioxidant activity; radical scavenging; REDUCING ANTIOXIDANT CAPACITY; HYDROGEN-PEROXIDE; ELECTROCHEMICAL OXIDATION; MECHANISM; ASSAYS; DECOMPOSITION; WINE; ION;

D O I：

10.1016/j.electacta.2015.10.091

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The cumene hydroperoxide oxidation on glassy carbon electrodes involves an irreversible one-electron transfer to peroxide and phenoxy radicals, being the main end products hydroquinone and acetone. The overall oxidation mechanism occurs in two steps: formation of acetone and a phenoxy radical, and the reaction of this phenoxy radical with water, getting stability by oxidizing into p-benzoquinone The interaction of such radicals with ascorbic and gallic acids decreases the oxidation signal of cumene hydroperoxide in differential pulse voltammetry. This decrease, due to the scavenging of the radicals formed after the electron transfer, is related to the antioxidant activities. So, it is possible to substitute the mercury as a probe for the electrochemical determination of antioxidant activity. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：1 / 5

页数：5

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