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Copper-modified conducting polymer layers for electroanalytic applications in neutral solutions

par Stoyanova, A.R.;Buess Herman, Claudine ;Tsakova, Ts.
Référence Bulgarian Chemical Communications, 40, 3, page (185-189)
Publication Publié, 2008

Article révisé par les pairs

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Résumé :

Specific effects, observed in the studies of three different reactions (reduction of nitrate ions, oxidation of ascorbate ions and oxidation of dopamine) on copper-modified polyaniline (PANI), poly-o-methoxyaniline (POMA) and poly-3,4-ethylene-dioxythiophene (PEDOT) layers are discussed. It is shown that copper deposition on PANT results in blocking of the pores in the polymer structure and impeding reactions, involving the diffusion of small ionic species througii the polymer layer. The comparative study of ascorbate oxidation on POMA, PANT and PEDOT points to the fact that the conjugated polymer (CP) layers conductivity is not always playing a crucial role in electrocatalytic applications. The weak electrocatalytic response, observed for dopamine oxidation on Cu-modified PANT, indicates the role of specific surface interactions impeding the access of the dopamine species to the copper surface. © 2008 Bulgarian Academy of Sciences, Union of Chemists in Bulgaria.