Electroenzymatic oxidation of polyaromatic hydrocarbons using chemical redox mediators in organic media

被引：12
|
作者：
Hernandez, Camilo E. La Rotta [1 ]
Werberich, Diogo S. [1 ]
D'Elia, Eliane [1 ]
机构：
[1] Univ Fed Rio de Janeiro, Inst Chem, Electrochem & Electroanal Lab, Ilha Fundao, Rio De Janeiro, RJ, Brazil
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2008年 / 10卷 / 01期
关键词：
horseradish peroxidase; polyaromatic hydrocarbons; mediators; photoactive quinones;
D O I：
10.1016/j.elecom.2007.10.028
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The bioelectrochemical oxidation of two polyaromatic hydrocarbons (PAH): anthracene (ANT) and pyrene (PYR), using horseradish peroxidase (HRP) resulting in the synthesis of photoactive polyaromatic quinones in organic media was studied. The electrochemical generation of hydrogen peroxide was compared with its direct addition in concentrations of up to 0.0012 mol L-1. In addition, three different chemical redox mediators were evaluated: ABTS, thionin and ortho-aminophenol. In a reaction medium containing 30% acetone and ABTS as mediator with a molar ratio mediator/PAH of 1:10, HRP attained the highest level of oxidation of PAH (1 x 10(-3) mol L-1): ANT (94%) and PYR (91%), producing 9,10-anthraquinone and mainly 1,2 and 4,5-pyrenequinones, respectively. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：108 / 112
页数：5
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