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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (23): 2680-2686. 上一篇    下一篇

研究论文

铂和铜电极上4-硝基吡啶-1-氧化物还原过程研究

郭玉良*,1,2, 郑翔龙2, 胡熙恩2, 朱泉1   

  1. (1东华大学化学与化工学院 上海 201620)
    (2清华大学核能与新能源技术研究院 北京 100084)
  • 投稿日期:2007-01-14 修回日期:2007-06-06 发布日期:2007-12-14
  • 通讯作者: 郭玉良

Reduction Performance of 4-Nitropyridine-1-oxide on the Electrodes of Platinum and Copper

GUO Yu-Liang*,1,2; ZHENG Xiang-Long2; HU Xi-En2; ZHU Quan1   

  1. (1 Department of Chemistry and Chemical Engineering, East China University, Shanghai 201620)
    (2 Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084)
  • Received:2007-01-14 Revised:2007-06-06 Published:2007-12-14
  • Contact: GUO Yu-Liang

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1122

被引次数

8

4-氨基吡啶是一种重要的精细化工产品, 为探讨其电化学合成过程的反应机理, 采用循环伏安法、库仑电解等方法对强酸性条件下4-硝基吡啶-1-氧化物的电化学行为进行了研究. 结果表明: 4-硝基吡啶-1-氧化物在铂电极上主要经历电化学-化学-电化学(ECE)还原历程, 并生成4-羟胺吡啶-1-氧化物; 对铜电极而言, 当电位高于－0.65 V时主要经历ECE还原历程, 并生成4-羟胺吡啶-1-氧化物; 当电位低于－0.85 V时经历ECE还原历程生成的4-羟胺吡啶-1-氧化物, 可发生进一步4e－还原, 并生成4-氨基吡啶.

关键词: 4-硝基吡啶-1-氧化物, 4-氨基吡啶, 电化学还原

4-Aminopyridine is an important fine chemical. To investigate the electrochemical synthesis mechanism of the 4-aminopyridine, the electrochemical behavior of 4-nitropyridine-1-oxide under the strong acid conditions was studied by cyclic voltammetry, controlled potential coulometry and some other methods. 4-Hydroxylaminopyridine-1-oxide was produced when 4-nitropyridine-1-oxide mainly went through the electrochemical-chemical-electrochemical (ECE) process on the platinum electrode. As far as the copper electrode was used, the potential should be higher than －0.65 V to go through the ECE process, and 4-hydroxylaminopyridine-1-oxide was produced. When the electrode potential was lower than －0.85 V, 4-hydroxylaminopyridine-1-oxide could be reduced further to 4-aminopyridine after another 4e－ transfer on the copper electrode.

Key words: 4-nitropyridine-1-oxide, 4-aminopyridine, electrochemical reduction