Determination of Surface pKa of Pure Mercaptoacetic Acid and 2- Mercaptobenzothiazole Mixed Monolayers by Impedance Titr
Interfacial proton transfer reactions of pure mercaptoacetic acid (MA) and 2-mercaptobenzothiazole (Mbz) mixed self-assembled monolayers (SAMs) have been studied using a.c. impedance titration method. The charge-transfer resistance (Rct) is measured with the monolayer composition and the ionic strength of pH solution. The surface pKa can be obtained by the plots of Rct and pH, the reasons of shifts of surface pKa are also explained.
作 者： Guang Han LU Chuan Yin LIU Hong Yan ZHAO Wei LIU Li Ping JIANG Ling Yan JIANG 作者单位： Guang Han LU,Hong Yan ZHAO,Wei LIU,Li Ping JIANG,Ling Yan JIANG(College of chemistry,Central China Normal University,Wuhan 430079)Chuan Yin LIU(College of chemistry,Central China Normal University,Wuhan 430079;Department of Chemistry,Yunyang Teacher's College,Danjiangkou Hubei 442700)
刊 名： 中国化学快报(英文版) ISTIC SCI 英文刊名： CHINESE CHEMICAL LETTERS 年，卷(期)： 2004 15(7) 分类号： 关键词： A.c.impedance titration mercaptoacetic acid 2-mercaptobenzothiazole self-assembled monolayers surface pKa