Poly(pyrrole-metallotetraphenylporphyrin)-modified electrodes: Part 2

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Abstract

The preparation of poly(pyrrole-metallotetraphenylporphyrin) films (metal = Ni(II), Zn(II), Co(II) and Cu(II)) has been achieved in CH2Cl2 + 0.1 M BU4NClO4 (TBAP) by anodic electropolymerization of the corresponding monomers in which the macrocycle is linked to a pyrrole group by an alkyl chain. The redox properties of these modified electrodes have been investigated by cyclic voltammetry. Their voltammograms display the regular electroactivity of the porphyrin derivatives; however, the reversible slow process Co(II)/Co(III) is exhibited only at a low sweep rate (ν = 0.005 V s−1. The free porphyrin base cannot be electropolymerized even in acidic conditions.

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