四甲基苯醌在氯化正丁基吡啶－AlCl＿3室温熔盐中的循环伏安行为

The Cyclic Voltammetry Behavior of Tetramethylquinone in Temperature Molten Salt BuPyCl-AlCl_3 Room

四甲基苯醌在氯化正丁基吡啶－ＡｌＣｌ＿３室温熔盐中的电化学行为，和室温熔盐的酸碱度有关，在碱性熔盐中，四甲基苯醌以不络合的形式存在，电极上的还原过程是一个ＥＣＥ过程；在酸性熔盐中，形成络合物ＴＱ（ＡｌＣｌ＿３）＿ｍ，络合数ｍ为１，２，３，随熔盐酸度变化，此外，醌类物质芳香环上的取代基，也影响其电化学性质。吸电子基团使还原电位正移，推电子基团使还原电位负移。

The electrochemical behavior on tetramethylquinone in n-butylpyridini-um chloride-aluminum chloride, a room temperature molten salt , is dependent on theacidity of this melt. Tetramethylquinone exists in uncomplexation state in a basic melt(1:0.8),and is reduced at the cathode electrode with an ECE process. The complexation oftetramethylquinone to AlCl in an acidic melt(1∶2) produces TO(AlCl)_m where m is thecomplexation number having the value of 1,2,3 , varied with the melt acidity, In addi-tion , the electrochemical behavior is affected also by the substituents on the aromaticring of quinones. Usually,the reduction potential is shifted to more positive by electron-attracting groups and to more negative by electron-repulsing groups.