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电化学(中英文) ›› 1996, Vol. 2 ›› Issue (3): 294-298. 

• 研究论文 • 上一篇    下一篇

有机介质中辅酶NADH的电化学氧化

杨防祖,吴辉煌,许书楷,周绍民   

  1. 厦门大学固体表面物理化学国家重点实验室
  • 收稿日期:1996-08-28 修回日期:1996-08-28 出版日期:1996-08-28 发布日期:1996-08-28

A Study on Electrochemical Oxidation of Reduced Nicotinamide Coenzyme NADH in Organic Media

YangFangzu;WuHuihuang;XuShukai;ZhouShsomin   

  1. (Dept.of Chem.,State Key Laboratory for Physical Chemistry of Solid Surface,Xiamen University,Xiamen 361005
  • Received:1996-08-28 Revised:1996-08-28 Published:1996-08-28 Online:1996-08-28

摘要: 用伏安法分别研究N,N′-二甲基甲酰胺和1,4-二氧六环介质中还原态烟酰胺辅酶NADH在玻碳电极上的电化学氧化行为并测定某些动力学参数。NADH的电氧化表现为完全不可逆过程,实验证明其过程伴有快速化学步骤。与在1,4-二氧六环介质中的相比,NADH在N,N′-二甲基甲酰胺介质中的电氧化速度和扩散系数较小,但电流响应较为稳定。根据溶剂效应讨论了上述实验结果。

关键词: NADH, 电化学氧化, 有机相酶学, 生物电化学

Abstract: The behaviour of electrochemical oxidation of the reduced nicotinamide coenzyme NADH on glassy carbon was studied and some kinetic parameters were measured by means of voltammometry in the N-dimethylformamide(DMF)and 1,4-dioxane media respectively. The eletrochemical oxidation of NADH shows completely irriversable both in the two solvents,and the diagnostic experiments support that the process involves a fast chemical step.The oxidation rate and the diffusion coefficient of N ADH in DMP are smaller than those in 1,4-dioxane,but the response current is more stable in DMF. The experimental results are discussed by solvent effects.

Key words: NADH, Electrochemical oxidation, organic phase enzymology, bioeletrochemistry

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