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Titolo:
The effect of glutaraldehyde on the electrochemical behavior of polyaniline
Autore:
de Melo, JV; Bello, ME; de Azevedo, WM; de Souza, JM; Diniz, FB;
Indirizzi:
UFPE,Brazil Dept Quim Fundamental, Lab Eletroquim, BR-50670901 Recife, PE,UFPE Recife PE Brazil BR-50670901 BCb Eletroquim, BR-50670901 Recife, PE,
Titolo Testata:
ELECTROCHIMICA ACTA
fascicolo: 14, volume: 44, anno: 1999,
pagine: 2405 - 2412
SICI:
0013-4686(1999)44:14<2405:TEOGOT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTEIN IMMOBILIZATION; GLUCOSE-OXIDASE; PH; ELECTRODES; FILMS; MICROELECTRODE; CHEMISTRY; BASE;
Keywords:
polyaniline; glutaraldehyde; modified electrodes; doping;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Diniz, FB UFPE, CCEN, Dept Quim Fundamental, Lab Eletroquim, Cidade Univ, BR-50670901 UFPE Cidade Univ Recife PE Brazil BR-50670901 BCniv, BR-50670901
Citazione:
J.V. de Melo et al., "The effect of glutaraldehyde on the electrochemical behavior of polyaniline", ELECTR ACT, 44(14), 1999, pp. 2405-2412

Abstract

Polyaniline was exposed to glutaraldehyde under different experimental conditions and in all cases reduction of the polymer was observed. The reduction of polyaniline by glutaraldehyde in non-electrolytic, aqueous medium under reflux, caused the polymer to become completely undoped and with high impermeability to anions as evidenced by the displacement of the first anodicvoltammetric wave of polyaniline in acidic medium and by its dependence onthe kind of acid employed. The permeability and the normal electrochemicalbehavior of the polymer could be restored after the first voltammetric cycle. Under simple exposure to glutaraldehyde in buffered solution (pH 8) thereduction is not so extensive and changes in voltammetric behavior from cycle to cycle are related to the high pH of the medium. Some glutaraldehyde polymerizes inside the polyaniline matrix, causing the first voltammetric wave of polyaniline to be slightly displaced to more anodic potentials. Enzyme immobilization on polyaniline with glutaraldehyde seems to be related tothis polyglutaraldehyde produced in buffered solutions. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 14:22:48