Molecular mechanism of interaction and electron transfer between dihydric phenols and L-cysteine

被引：1

作者：

Zhao, GH ^{[1
]}

Li, MF ^{[1
]}

Li, HX ^{[1
]}

Hu, ZH ^{[1
]}

Cao, TC ^{[1
]}

Huang, M ^{[1
]}

机构：

[1] Tongji Univ, Dept Chem, Shanghai 200092, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 2006年 / 41卷 / 03期

基金：

中国国家自然科学基金;

关键词：

L-cysteine; dihydric phenol; Cyclic Voltammetry; interaction; molecular mechanism; electron transfer;

D O I：

10.1080/10934520500428328

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The mechanism and electron transfer for pollutant dihydric phenol and biomolecule L-Cysteine (L-Cys) interaction in aqueous solution were studied by means of electrochemistry and UV-VIS spectrophotometry. Two forms of L-Cys, fixed on Au-electrode and free dissolved in the solution, were examined. The results showed that L-Cys of an ordered monolayer fixed on an Au electrode facilitated electron transfer and electrocatalytic redox of three isomers of dihydric phenol. However, free L-Cys does not show such facility. Furthermore, neither cleavage of the original chemical bond nor formation of a new chemical bond was observed in the molecules investigated, suggesting that L-Cys molecules may associate tightly with dihydric phenol molecules to form L-Cys - C6H6O2 or (L-Cys)(2) - C6H6O2 complex molecule via hydrogen-bonding. Different coordination numbers influence the electrochemical activity and behavior of associated complexes; thus, the function of biomolecules could be affected.

引用

页码：447 / 456

页数：10