Alkanethiol monolayers and alkanethiol|phospholipid bilayers supported by mercury:: an electrochemical characterization

被引：43

作者：

Buoninsegni, FT ^{[1
]}

Herrero, R ^{[1
]}

Moncelli, MR ^{[1
]}

机构：

[1] Univ Florence, Dept Chem, I-50121 Florence, Italy

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 452卷 / 01期

关键词：

mercury; alkanethiol monolayer; alkanethiol/phospholipid bilayer; permeability;

D O I：

10.1016/S0022-0728(98)00099-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The preparation of self-assembled alkanethiol monolayers and alkanethiol \ phospholipid bilayers on a home-made hanging mercury drop electrode is described. Two different experimental procedures are used to prepare alkanethiol monolayers on mercury. Once a stable thiol monolayer is obtained on the mercury electrode, formation of the bilayer is simple and highly reproducible. The bilayers consist of a thiol monolayer anchored to mercury via the sulfur atom, with a second phospholipid monolayer on top of it. Monolayers and bilayers are characterized electrochemically by measuring capacitance and resistance. Both thiol-coated and thiol I lipid-coated mercury electrodes present a compact and well-ordered structure, absence of defects and high reproducibility. The permeability of these films to compounds with different degrees of lipophilicity is examined. The results point to a high impermeability of self-assembled alkanethiol monolayers and mixed alkanethiol I phospholipid bilayers supported by mercury to lipophilic compounds. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：33 / 42

页数：10

共 42 条

[1] APPLICATION OF CATALYTIC STRIPPING VOLTAMMETRY FOR THE DETERMINATION OF ORGANIC SULFUR-COMPOUNDS AT A HANGING MERCURY DROP ELECTRODE - BEHAVIOR OF CYSTEINE, CYSTINE AND N-ACETYLCYSTEINE IN THE PRESENCE OF NICKEL ION [J].