Electrochemistry and detection of some organic and biological molecules at conducting polymer electrodes .3. Evidence of the electrocatalytic effect of the heteroatom of the poly(hetetroarylene) at the electrode/electrolyte interface

被引:39
作者
Atta, NF
Marawi, I
Petticrew, KL
Zimmer, H
Mark, HB
Galal, A
机构
[1] UNIV CINCINNATI,DEPT CHEM,CINCINNATI,OH 45221
[2] CAIRO UNIV,DEPT CHEM,GIZA,EGYPT
来源
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1996年 / 408卷 / 1-2期
关键词
organic polymer electrode; electrocatalysis; neurotransmitters; ascorbic acid; XPS; diffusion coefficients; electropolymerization;
D O I
10.1016/0022-0728(95)04286-5
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The electrocatalytic effect of the conducting poly(3-methylthiophene) film (3-PMT) electrode on the redox behavior of catechol compounds has been examined. The nature of the electrode material substrate had no effect on the peak potentials in the cyclic voltammograms (CVs) of different redox systems of biological interest: p-aminophenol, dopamine, catechol and ascorbic acid. The nature of the heteroatom of 3-PMT, polypyrrole, polyfuran and polyanaline had a very large effect on their electrokinetic properties. The adsorption of molybdenum ion results in the blocking of 'the active sites' at the interface, as indicated by the disappearance of the electrochemical activity of the 3-PMT film electrode. The surface examination by X-ray photoelectron spectroscopy (XPS) of the molybdenum exposed polymer suggests the possibility of a chemical bonding between the metal ions and the sulfur heteroatom of the polymer surface. The 'apparent' diffusion coefficients D-app were determined from the effect of the scan rate dependency of CVs of the catechol, etc. The results showed that the electron transfer is predominantly diffusion controlled at the polymer / solution interface and probably involves the sulfur heteroatom specifically.
引用
收藏
页码:47 / 52
页数:6
相关论文
共 39 条
[1]  
ABRUNA HD, 1988, ELECTRORESPONSIVE MO, V1
[2]  
[Anonymous], 1979, HDB XRAY PHOTOELECTR
[3]  
[Anonymous], 1986, Handbook of Conducting Polymers
[4]  
[Anonymous], 1986, Handbook of Conducting Polymers
[5]   KINETICS OF ELECTRON-TRANSFER CROSS-REACTIONS WITHIN REDOX POLYMERS - COATINGS OF A PROTONATED POLYLYSINE CO-POLYMER WITH INCORPORATED ELECTROACTIVE ANIONS [J].
ANSON, FC ;
OHSAKA, T ;
SAVEANT, JM .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1983, 105 (15) :4883-4890
[6]   VOLTAMMETRIC STUDIES OF THE OXIDATION OF REDUCED NICOTINAMIDE ADENINE-DINUCLEOTIDE AT A CONDUCTING POLYMER ELECTRODE [J].
ATTA, NF ;
GALAL, A ;
KARAGOZLER, AE ;
ZIMMER, H ;
RUBINSON, JF ;
MARK, HB .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1990, (19) :1347-1349
[7]   ELECTROCHEMISTRY AND DETECTION OF SOME ORGANIC AND BIOLOGICAL MOLECULES AT CONDUCTING POLY(3-METHYLTHIOPHENE) ELECTRODES [J].
ATTA, NF ;
GALAL, A ;
KARAGOZLER, AE ;
RUSSELL, GC ;
ZIMMER, H ;
MARK, HB .
BIOSENSORS & BIOELECTRONICS, 1991, 6 (04) :333-341
[8]   CHEMICAL MODIFICATION OF ELECTRODES [J].
BARD, AJ .
JOURNAL OF CHEMICAL EDUCATION, 1983, 60 (04) :302-304
[9]  
BETTELHEIM A, 1982, INORG CHEM, V45, P1233
[10]  
CHAMBERS JQ, 1981, J ELECTROANAL CHEM, V130, P381, DOI 10.1016/S0022-0728(81)80410-X