Acta Chimica Sinica ›› 2002, Vol. 60 ›› Issue (4): 698-703. Previous Articles     Next Articles

Original Articles

充蜡石墨支撑的季铵离子/己二酸混合双层膜上钙离子诱发的离子通道行为

龚静鸣;邓兆祥;林祥钦   

  1. 中国科技大学化学系,合肥(230026)
  • 发布日期:2002-04-15

Calcium Ion Induced Ion Channel Behavior of Supported Hybrid Bilayer Membranes on a Waxed Graphite Electrode

Gong Jingming;Deng Zhaoxiang;Lin Xiangqin   

  1. Department of Chemistry, University of Science and Technology of China,Hefei(230026)
  • Published:2002-04-15

A new kind of solid substrate, a wax-saturated graphite electrode (WGE), was used to support lipid layer membranes. On the surface of the WGE, a novel self-assembled hybrid bilayer membrane was fabricated by quaternary ammonium ions (including tetrabutyl amine-TBA, cetyl trimethylamine-CTrMA) with hexanedioic acid. From the cyclic voltammetry and ac impedance studies, the ion channel behavior of the supported hybrid bilayer membranes was characterized. In the presence of Ca~(2+) as the stimulus and [Fe(CN)_6]~(3-/4-) as the marker ions, the ion channel effect and distinct channel current were observed. The channel was in closed state in the absence of Ca~(2+). Two types of the structure of the hybrid bilayer membrane for the HDA-quaternary ammonium system were proposed: V and W types. This new membrane shows excellent stability and can be prepared easily.

Key words: CYCLOVOLTAMGRAPH, IMPEDANCE, CALCIUM ION, QUATERNARY AMMONIUM COMPOUNDS, HEXANEDIOIC ACID P

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