3-乙氧基-4-羟基苯乙醇酸在聚邻甲苯胺-Cu^(2+)膜电极上的电氧化  

Electrooxidation of 3-Ethoxy-4-Hydroxy-mandelic Acid on Poly(o-toluidine)/Cu^(2+) Film Electrode

作　　者：刘万民[1] 陈范才[2] 惠海军[1] 杜超[1] 赵瑞[1] 

机构地区：[1]湖南工程学院化学化工系,湖南湘潭411104 [2]湖南大学化学化工学院,湖南长沙410082

出　　处：《化学研究》2008年第3期74-78,共5页Chemical Research

摘　　要：采用循环伏安法制备了聚邻甲苯胺(POT)膜电极,再以浸泡吸附法在此膜中嵌入Cu2+,制成POT-Cu2+膜电极.研究了POT-Cu2+膜电极对3-乙氧基-4-羟基苯乙醇酸的电氧化行为,并讨论了影响电氧化活性的主要因素.结果表明,50℃下,在含有0.5mol.L-13-乙氧基-4-羟基苯乙醇酸的1.5mol.L-1氢氧化钠溶液中,POT-Cu2+膜电极具有高的电氧化活性和良好的稳定性.将该电极用于3-乙氧基-4-羟基苯乙醇酸电解氧化脱羧制备乙基香兰素,在0.55V(vsSCE)下恒电位电解1h,乙基香兰素的产率可达89%以上,电流效率达97%以上.The poly （o-toluidine） （POT） film electrode with bivalent copper ions （ Cu^2 ＋ ） embedded was prepared by cyclic voltammetry. The electrochemical activity of the POT-Cu^2＋ film electrode for electrooxidation of 3-ethoxy-4-hydroxy mandelic acid was studied using cyclic vohammetry. At the same time the factors that affected electrooxidation reaction were discussed. It was shown that the POT-Cu^2＋ film electrode was rather active and stable in 1.5 mol·L^-1 NaOH solution dissolved 0. 5 mol·L^-1 3- ethoxy-4-hydroxy mandelic acid under the temperature of 50℃. The film electrode was used for the electrooxidation of 3-ethoxy-4 -hydroxy mandelic acid at 0. 55 V vs SCE. The current efficiency was 97% and the yield of ethylvanillin was up to 89%.

关 键 词：聚邻甲苯胺 修饰电极 3-乙氧基4堀基苯乙醇酸 电氧化 乙基香兰素 

分 类 号：O646.54[理学—物理化学]