The effect of glutaraldehyde on the electrochemical behavior of polyaniline

被引：24

作者：

de Melo, JV ^{[1
]}

Bello, ME ^{[1
]}

de Azevêdo, WM ^{[1
]}

de Souza, JM ^{[1
]}

Diniz, FB ^{[1
]}

机构：

[1] UFPE, CCEN, Dept Quim Fundamental, Lab Eletroquim, BR-50670901 Recife, PE, Brazil

来源：

ELECTROCHIMICA ACTA | 1999年 / 44卷 / 14期

关键词：

polyaniline; glutaraldehyde; modified electrodes; doping;

D O I：

10.1016/S0013-4686(98)00375-2

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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 anodic voltammetric wave of polyaniline in acidic medium and by its dependence on the kind of acid employed. The permeability and the normal electrochemical behavior of the polymer could be restored after the first voltammetric cycle. Under simple exposure to glutaraldehyde in buffered solution (pH 8) the reduction 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 to this polyglutaraldehyde produced in buffered solutions. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2405 / 2412

页数：8

共 21 条

[1] COULOMBIC IRREVERSIBILITY AT POLYANILINE-COATED ELECTRODES BY ELECTROCHEMICAL SWITCHING [J].

AOKI, K ;

CAO, JA ;

HOSHINO, Y .

ELECTROCHIMICA ACTA, 1993, 38 (13) :1711-1716

[2] SPECTROSCOPIC STUDIES OF ACCEPTOR AND DONOR DOPING OF POLYANILINE IN THE EMERALDINE BASE AND PERNIGRANILINE FORMS [J].

CAO, Y .

SYNTHETIC METALS, 1990, 35 (03) :319-332

[3]

Cass A. E. G., 1990, BIOSENSORS PRACTICAL

[4] ROLE OF ION-EXCHANGE IN THE REDOX PROCESSES OF A POLYANILINE FILM STUDIED BY AN AC QUARTZ CRYSTAL MICROBALANCE [J].

CORDOBATORRESI, S ;

GABRIELLI, C ;

KEDDAM, M ;

TAKENOUTI, H ;

TORRESI, R .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1990, 290 (1-2) :269-274

[5] Ion exchange properties of polyaniline: Potentiometric measurements on membranes and coated wire electrodes [J].

Diniz, FB ;

deFreitas, KCS ;

deAzevedo, WM .

ELECTROCHIMICA ACTA, 1997, 42 (12) :1789-1793

[6]

FRANK MHT, 1994, J ELECTROANAL CHEM, V379, P399

[7] SOME PROBLEMS CONNECTED WITH THE STUDY AND EVALUATION OF THE EFFECT OF PH AND ELECTROLYTE CONCENTRATION ON THE BEHAVIOR OF POLYANILINE FILM ELECTRODES [J].

INZELT, G ;

HORANYI, G .

ELECTROCHIMICA ACTA, 1990, 35 (01) :27-34

[8] A MICROELECTRODE STUDY OF THE INFLUENCE OF PH AND SOLUTION COMPOSITION ON THE ELECTROCHEMICAL-BEHAVIOR OF POLYANILINE FILMS [J].

KALAJI, M ;

NYHOLM, L ;

PETER, LM .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 313 (1-2) :271-289

[9] Platinization of shapable electroconductive polymer film for an improved glucose sensor [J].

Khan, GF ;

Wernet, W .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (10) :3336-3342

[10] Microgravimetric and laser beam deflection studies of redox reactions in polyaniline at various concentrations of doping anions [J].

Koziel, K ;

Lapkowski, M ;

Vieil, E .

SYNTHETIC METALS, 1997, 84 (1-3) :91-92

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