Study on surface acid-base property of carboxylic acid-terminated self-assembled monolayers by cyclic voltammetry and electrochemical impedance spectroscopy

被引：0
|
作者：
罗立强
程志亮
杨秀荣
汪尔康
机构：
[1] Laboratory of Electroanalytical Chemistry and National Analytical Research Center of Electrochemistry and Spectroscopy
[2] Changchun Institute of Applied Chemistry
[3] Chinese Academy of Sciences
[4] Jilin 130022
[5] China
来源：
ChineseJournalofChemistry | 2000年 / 06期
基金：
中国国家自然科学基金;
关键词：
Surface pKa; self-assembled monolayer; cyclic voltammetry; electrochemical impedance;
D O I：
暂无
中图分类号：
O657.3 [光化学分析法（光谱分析法）];
学科分类号：
摘要：
Cyclic voltammetry and electrochemical impedance spec-troscopy were used to study the surface acid-base property of carboxylic acid-terminated self-assembled monolayers(SAMs).A carboxylic acid-terminated thiol,such as thioctic acid(1,2-dithiolane-3-pentanoic acid),was self-assembled on gold electrodes.Electron transfer between the bulk solution and the SAM modified electrode was studied at different pH using Fe(CN)63-as a probe.The surface pka of thioctic acid was determined by cyclic voltammetry and electrochemical impedance spectroscopy to be 5.6 ±0.1 and 5.8±0.1,respectively.The method is compared with other methods of monolayer pKa measurement.
引用
收藏
页码：863 / 867
页数：5
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