高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (10): 1834.

• 论文 • 上一篇    下一篇

双通道微米管支撑的微-液/液界面上电荷转移反应的研究

陈勇, 苏彬, 邵元华   

  1. 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, 长春 130022
  • 收稿日期:2002-05-10 出版日期:2003-10-24 发布日期:2003-10-24
  • 通讯作者: 邵元华(1962年出生),男,博士,研究员,博士生导师,从事应用各种电化学方法研究电荷在液液界面的转移反应过程及生物电化学和电分析化学研究.E-mail:yhshao@chem.pku.edu.cn E-mail:yhshao@chem.pku.edu.cn
  • 基金资助:

    国家杰出青年基金(批准号:29825111);中国科学院电分析化学国家重点实验室基金资助

Studies on Charge Transfer Across the Micro-liquid/Liquid Interface Supported at a Double-barrel Micropipette

CHEN Yong, SU Bin, SHAO Yuan-Hua   

  1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2002-05-10 Online:2003-10-24 Published:2003-10-24

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被引次数

5

摘要： 将有机相和水相分别灌入双通道玻璃微米管θ管中的一个管中,利用θ管表面的亲水特征,在灌有有机相的微米管口附近形成微-液/液界面.利用循环伏安法研究了电荷在这种微-液/液界面上的转移反应,包括简单离子(四甲基铵离子TMA+)转移、加速离子转移(DB18C6加速K+离子)和电子转移(二茂铁/铁氰化钾+亚铁氰化钾体系)反应过程.结果表明,这种双通道微米管所得到的微-液/液界面具有不对称扩散场的特性.此装置是目前最简单的可用于研究液/液界面上的电荷转移反应的装置之一,即所谓的可进行"无溶液"液/液界面电化学及电分析化学研究的装置.

关键词: 双通道微米管, 微-液/液界面, 电荷转移, 循环伏安法

Abstract: In this paper, the charge transfer across the micro-liquid/liquid interface supported at the orifice of a double-barrel micropipette, namely, a θ-pipette, is reported.Simple ion transfer(TMA+), facilitated ion transfer(potassium ion transfer facilitated by DB18C6), and electron transfer(ferrocene and ferri/ferrocyanide system) have been investigated by cyclic voltammetry.The experimental results show that a very thin aqueous film, linking both barrels filled with the aqueous solution and the organic solution respectively, can spontaneously be formed on the outer glass surface of such a double-barrel micropipette to construct a micro-liquid/liquid interface, which provides the asymmetry of diffusion field.Such device is demonstrated experimentally which can be employed as one of the simplest electrochemical cells to investigate the charge transfer across the liquid/liquid interface.

Key words: Double-Barrel micropipette, Micro-liquid/liquid interface, Charge transfer, Cyclic voltammetry

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