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• W2012168449 abstract "Abstract The expulsion of H+ during electrochemical polymerization of pyrrole in aqueous solution has been found by titration to be close to 2H+ (over 70%) per pyrrole monomer polymerized. The first reduction scan of polypyrrole as polymerized, PPyy+(yX−), during cyclic voltammetry run in CH3CN solution containing the supporting electrolyte Et4N+X− from 0 to −0.8 V vs SCE showed a well defined de-intercalation peak with very small residual currents. From the charge consumed in the de-intercalation peak q2 and the charge consumed in polymerization q1 one can find the value of y by y = 2 q 2 ( q 1 – q 2 ) . From in-situ observation of the VIS spectrum of electrochemically reduced PPy the inter-band absorption peak wavelength offers an estimation of the conjugation length of PPy prepared, which is usually rather short being 4–5. The possibility of spontaneous anion exchange between X− in PPy(X−) and Y− in aqueous solution has been studied. Examples of fast and complete exchange as well as those of partial, difficult and no exchange are given. Quasi-equilibrium electrode potential for Pt,PPy(Cl− | Cl− has been studied and a Nernst electrode response to Cl− concentration in solution was found." @default.
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• W2012168449 date "1989-01-01" @default.
• W2012168449 modified "2023-09-27" @default.
• W2012168449 title "Electrochemical aspects of polypyrrole" @default.
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• W2012168449 doi "https://doi.org/10.1016/0379-6779(89)90498-0" @default.
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