Adsorption of phenosafranin at the water|1,2 DCE interface:: a voltammetric approach

被引：11

作者：

Iglesias, RA ^{[1
]}

Dassie, SA ^{[1
]}

Baruzzi, AM ^{[1
]}

机构：

[1] Univ Nacl Cordoba, Fac Ciencias Quim, Dept Quim Fis, Inst Invest Fisicoquim Cordoba, RA-5000 Cordoba, Argentina

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2000年 / 483卷 / 1-2期

关键词：

phenosafranin; liquid vertical bar liquid interfaces; adsorption at ITIES; ion-pair; cyclic voltammetry;

D O I：

10.1016/S0022-0728(99)00504-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In the present paper the interfacial behavior of a cationic dye, phenosafranin (PhS+), is voltammetrically analyzed. A sharp and narrow peak during the negative sweep was observed. The dependence of this peak on concentration, sweep rate and switch potential was a clear indication of an adsorption-desorption process similar to those observed on solid electrodes. It was determined that the adsorbed species results from the ion pairing between dicarbollylcobaltate (DCC-) and PhS+ at the interface as the process is observed only when the interface is polarized at the potential transfer of DCC-. The process fitted with a Frumkin isotherm and indicated a strong attractive interaction (g = - 2.3) between the adsorbed species. This interaction was also analyzed spectrophotometrically. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：157 / 162

页数：6