Behavior of the semiquinone anion radical of hypocrellin B produced by electrolysis in dimethylsulfoxide
Behavior of the semiquinone anion radical of hypocrellin B produced by electrolysis in dimethylsulfoxide
复制标题
DOI：
10.1163/1568567041257553
复制
发表时间：
2004-06
影响因子：
3.3
通讯作者：
Jiahong Zhou;Kuiwang Wu;S. Xia;Xuesong Wang;Bao-wen Zhang;Yi Cao
中科院分区：
文献类型：
--
作者：
Jiahong Zhou;Kuiwang Wu;S. Xia;Xuesong Wang;Bao-wen Zhang;Yi Cao
用循环伏安法、稳态电子自旋共振、时间分辨电子自旋共振和原位UV-Vis光谱研究了电解法产生的竹红菌素B(HB)半醌阴离子自由基的行为。结果表明，Hb-·的生成机理在电解和光解过程中不同，Hb(Hb-·)的半醌阴离子自由基在二甲基亚砜中不发生歧化反应，相反，实验上观察到Hb-与Hb反应生成Hb-·的合成反应。同时，通过Hb-·的时间衰减实验，得到了Hb-·的动力学参数。
The behavior of the semiquinone anion radical of hypocrellin B (HB), produced by electrolysis, has been studied by cyclic voltammetry, steady-state electron spin resonance, timeresolved electron spin resonance and in situ UV-Vis spectra. The results showed that the formation mechanisms of HB —· were different between electrolysis and photolysis, and the disproportionation of semiquinone anion radical of HB (HB —· ) could not occur in dimethylsulfoxide; on the contrary, a syn -proportionation reaction in which HB 2— reacts with HB to form HB —· was observed experimentally. At the same time, the kinetic parameters of HB —· were obtained from the time-decay experiments of HB —· .