高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (7): 1233.

• 研究论文 • 上一篇    下一篇

仿生生物膜上多巴胺的电子转移过程研究

胡丽娜, 张立敏, 卢小泉   

  1. 西北师范大学化学化工学院, 兰州730070
  • 收稿日期:2004-08-26 出版日期:2005-07-10 发布日期:2005-07-10
  • 通讯作者: 卢小泉(1966年出生),男,博士,教授,博士生导师,从事电化学研究.E-mail:luxq@nwnu.edu.cn. E-mail:luxq@nwnu.edu.cn.
  • 基金资助:

    国家自然科学基金(批准号:20275031,20335030);教育部第四届高校青年教师教学科研奖励计划(TRAPOYT);中国科学院长春应用化学研究所电分析化学国家重点实验室开放课题基金资助

Electron Transfer Process of Dopamine at Mimicking Biomembrane

HU Li-Na, ZHANG Li-Min, LU Xiao-Quan   

  1. College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
  • Received:2004-08-26 Online:2005-07-10 Published:2005-07-10

PDF (PC)

被引次数

22

摘要： 利用薄层法(TLCV)研究了硝基苯(NB)/水(W)界面上二茂铁(Fc)-多巴胺(DA)体系的电子迁移(ET)过程,得到该体系界面电子转移速率常数为1.012cm.s-1.mol-1.L,界面电子转移反应为单电子过程(n=0.89).采用扫描电化学显微镜(SECM)对同一体系进行研究,得到电子迁移速率常数为(1.10±0.2)cm.s-1.mol-1.L,两种方法所得结果吻合,证明了薄层法的可行性.同时,低的反应物浓度比又一次验证了Barker理论.

关键词: 多巴胺(DA), 薄层循环伏安法(TLCV), 电子转移(ET), 扫描电化学显微镜(SECM)

Abstract: An electron transfer reaction between ferrocene and dopamine (DA) in a aqueous solution and oxidizing agent in an organic solution immiscible with water was studied by thin-layer cyclic voltammetry(TLCV) for charge transfer on the liquid/liquid(L/L) interface. The bimolecular rate constants(k) were obtained and one electron transfer process on the interface could be observed. The oxidation reaction of DA on the L/L interface by above method was discussed in comparison with the result obtained by scanning electrochemical microscopy (SECM) and got a reasonable agreement between them, which could give a prove to the practicality of TLCV. Otherwise, lower concentration ratios Kr of aqueous to organic reactants were adopted, which gave an evidence to the proposed procedure of Barker.

Key words: Dopamine (DA), Thin-layer cyclic voltammetry (TLCV), Electron transfer(ET), Scanning electrochemical microscopy (SECM)

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