INCORPORATION OF ANIONIC METALLOPORPHYRINS INTO POLY(PYRROLE-ALKYLAMMONIUM) FILMS .2. CHARACTERIZATION OF THE REACTIVITY OF THE IRON(III) PORPHYRININC-BASED POLYMER

Polypyrrole films containing alkylammonium groups have been deposited on graphite and ITO transparent electrodes by a simple and monomer sav ing oxidative electropolymerisation of an adsorbed amphiphilic N-subst ituted pyrrole. The irreversible incorporation of tetra anionic mangan ese, zinc and iron porphyrins is easily achieved in the pre-formed fil ms and these modified electrodes have been characterized by cyclic vol tammetry and absorptiometric measurements. Finally, the reactivity of the polymer containing iron(III) porphyrin towards nitric oxide in aci dic aqueous solution has been proved by the formation of the iron-nitr osyl complex within the polypyrrole film.