提龙
库仑法
化学
电化学
水溶液
循环伏安法
氧化还原
无机化学
部分
醌
电极
有机化学
物理化学
酶
超氧化物
作者
Yan Xu,Yue Wen,Jie Cheng,Gao Ping Cao,Yu Yang
出处
期刊:Advanced Materials Research
日期:2011-11-22
卷期号:396-398: 1730-1735
被引量:7
标识
DOI:10.4028/www.scientific.net/amr.396-398.1730
摘要
Electrochemical oxidation of tiron in the presence of H2O as a nucleophile in strongly acidic aqueous solutions was studied by cyclic voltammetry, controlled-voltage coulometry and spectrometric investigations. The mechanism of electrochemical reaction is confirmed by spectrophotometric tracing in various times of controlled-voltage coulometry. The voltammetric and spectrophotometric foundations indicate that a 1,4-Michael addition of H2O from its hydroxy moiety to the position 4 of electrochemically derived o-quinone is occurred. The electrochemical oxidation and reduction of tiron has been successfully accomplished by controlled-voltage coulometry in a redox flow-through type cell and the final electro-reduced product was characterized by spectrophotometric, 1H NMR and mass spectrometric methods. It is demonstrated that the electro-oxidation of tiron follows an ECE mechanism in acidic aqueous solutions, leading to formation of a new compound of para- benzoquinone derivative.
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