高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (11): 1680.

• 论文 • 上一篇    下一篇

辅酶Ⅰ在β-萘醌磺酸根修饰金带电极上的电化学还原

鞠熀先, 马威, 蔡称心, 陈洪渊   

  1. 南京大学化学系, 南京, 210093
  • 收稿日期:1994-12-31 修回日期:1995-04-19 出版日期:1995-11-24 发布日期:1995-11-24
  • 通讯作者: 鞠熀先,男,31岁,博士,副教授.
  • 作者简介:鞠熀先,男,31岁,博士,副教授.
  • 基金资助:

    国家自然科学青年基金

The Electrochemistry of Nicotinamide-adenine Dinucleotide at a β-Naphthochinonsulfonicum Modified Gold Band Electrode

JU Huang-Xian, MA Wei, CAI Chen-Xin, CHEN Hong-Yuan   

  1. Department of Chemistry, Nanjing University, Nanjing, 210093
  • Received:1994-12-31 Revised:1995-04-19 Online:1995-11-24 Published:1995-11-24

摘要: 研制了聚毗咯/NQS修饰金带电极,讨论了NQS/PPy的电聚合过程及实验条件对金电极上吡咯聚合物膜性质的影响;用成核及生长理论解释了阴离子NQS对电聚合过程计时电流曲线的影响,优化了NQS/PPy/Au电极的制备条件。该修饰电极稳定性好,对辅酶Ⅰ在金电极上的还原有催化作用。在pH=7.0时催化电流在4.0×10-5~1.5×10-3mol/L范围内与NAD+浓度有线性关系,探讨了电催化作用的机制。

关键词: 修饰电极, 聚吡咯, 金带电极, &beta, -萘醌磺酸钠, 辅酶Ⅰ

Abstract: The preparation of β-naphthochinonsulfon-icum(NQS) modified gold band electrode was studied.The electropolymerization process of NQS/PPy and the effects of experimental conditions on the behaviour of polymer membrane were discussed. The effect of anionic NOS on chronoamperometric curves in electropolymerization process was explained with the nucleation and growth theory. The modified electrode can catalyze the electrochemical reduction of NAD+at a gold electrode. At pH 7.0,the catalytic peak current is proportional to the concentration of NAD+in the range of 4.0× 10-3to 1. 5×10-3mol/L. The electrocatalvtical mechanism was also discussed.

Key words: Modified electrode, Polypyrrole, Gold band electrode, β-naphthochinonsulfonicum, Nicotinamide-adenine dinueleotide

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