四甲基对苯醌电化学还原研究  

Study on the electrochemical reduction of tetramethyl-p-benzoquinone

作　　者：任园园[1] 金葆康[1] 

机构地区：[1]安徽大学化学化工学院,安徽合肥230039

出　　处：《安徽大学学报（自然科学版）》2011年第6期87-92,共6页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20775001);教育部新世纪优秀人才基金资助项目(NECT-07-0002)

摘　　要：利用循环伏安法、现场红外光谱电化学、循环伏吸法及导数循环伏吸法研究四甲基对苯醌(TMBQ)在乙腈溶液中的电化学氧化还原过程.结果表明:TMBQ的电化学还原并不是简单的两步单电子还原过程.研究发现,还原过程同时伴随后行化学反应.TMBQ的还原产物在-0.32 V处产生不可逆氧化峰,表明在四甲基对苯醌的电化学还原过程中发生了二聚反应.现场红外光谱电化学进一步证实了二聚体的生成.Cyclic voltammetry,IR spectroelectrochemistry,cyclic voltabsorptometry and derivative cyclic voltabsorptometry techniques were used to investigate the electrochemical reduction of tetramethyl-p-benzoquinone（TMBQ） in CH3CN solution.The experimental results showed that the electrochemical reduction of TMBQ is not simple two-step single electron transfer process.Further study indicated that the reduction process is coupled with following chemical reaction.An irresversible oxidation peak at-0.32 V was observed.The result suggests that dimerization reaction occurred during the electrochemical reduction process of TMBQ.In situ IR spectroelectrochemistry further confirmed the formation of dimers.

关 键 词：现场红外光谱电化学 循环伏吸法 导数循环伏吸法 四甲基对苯醌 

分 类 号：O621.2[理学—有机化学]