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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3070

Title: Properties of a low band gap conducting polymer electrode used for amperometric detection in liquid chromatography
Authors: Staes, E
Nagels, LJ
Issue Date: 1999
Citation: ELECTROANALYSIS, 11(1). p. 65-69
Abstract: The performance characteristics of a conductive polymer, used as working electrode material in a wall-jet amperometric detector are described. The electrode coating consisted of a poly(5,6-dithio-octyl-1,3-dithienylisothianaphthene) layer. The material was coated on the surface of a glassy carbon electrode through evaporation from a dichloromethane solution. It is a low band gap polymer (1.41 eV), with an intrinsic conductivity of 10(-2) S cm(-1), which makes the use of a dopant unnecessary. Catecholamines were used as model substances in oxidative measurements. Detection limits in LC separations with 4.6 mm ID columns (1 mL min(-1) flow-rate) were 250 pg; the t(90) response time was 3 s. Quinones and nitrophenolics were studied in reductive measurements. The material could be used at negative potentials down to -800 mV (vs. SCE) without losing its electrocatalytic and conductive properties. The coating was competitive to glassy carbon in most respects and superior to polypyrrole. It showed group specificity in reductive measurements, e.g., quinones were reduced whereas nitrogroups (electroactive on glassy carbon) were not. The material can be used over a large potential range, shows good electrochemical activity and is very stable. It is suggested for use in modified electrodes.
Notes: Univ Antwerp, RUCA, Dept Chem, B-2020 Antwerp, Belgium. Limburgs Univ Ctr, Inst Mat Res, Div Organ & Polymer Chem, B-3590 Diepenbeek, Belgium.Staes, E, Univ Antwerp, RUCA, Dept Chem, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
URI: http://hdl.handle.net/1942/3070
DOI: 10.1002/(SICI)1521-4109(199901)11:1<65::AID-ELAN65>3.0.CO;2-A
ISI #: 000079647000009
ISSN: 1040-0397
Type: Journal Contribution
Validation: ecoom, 2000
Appears in Collections: Research publications

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