Electropolymerization of N,N′-dimethyl-1,4-dihydropyrrolo[3,2-b]pyrrole: a new heteroaromatic polymer

Abstract

The electro-oxidative polymerization of N,N′-dimethyl-1,4-dihydropyrrolo[3,2-b]pyrrole (DMPP) in acetonitrile solution led to the formation of a polymeric film on the electrode surfaces. This poly-DMPP film underwent reversible oxidation and reduction processes in both acetonitrile and aqueous solution. The formal redox potential (E°′) was ca. 0.10 V vs. a sodium chloride/saturated calomel electrode in 0.1M-NaClO₄ in acetonitrile solution. The electrical conductivity was 1.1 × 10^–5 S cm^–1 at 298 K. Further physical, electrochemical, electrical, and spectroscopic characterization of poly-DMPP was carried out, and the results were compared with those obtained previously for poly-(1,4-dihydropyrrolo[3,2-b]pyrrole) film.