Poly(benzimidazole) and substituted poly(benzimidazoles): Novel, electroactive, and conducting polymers possessing high catalytic and coordination properties

Abstract

Benzimidazoles and substituted benzimidazoles were electropolymerized on a Pt electrode using acetonitrile containing 0.1 MNaClO 4 . The polymers are electroactive and conducting. They have a high electrocatalytic effect on the reduction of H ϩ , O 2 , and CO 2 and exhibit high coordination ability. The properties of the polymers depend on the extent of conjugation in the monomer.

Facile One-Pot Synthesis of 6-Monosubstituted and 6,12-Disubstituted 5,11-Dihydroindolo[3,2-b]carbazoles and Preparation of Various Functionalized Derivatives

“…Benzimidazoles are very useful intermediates or subunits for the development of molecules with pharmaceutical or biological interest . Moreover, polybenzimidazoles have been reported as electroactive and conducting polymers and widely studied as a fuel-cell membrane . Using a known method reported by Black et al, we converted ICZ 8 to benzimidazoles 9a − c in acceptable to good yields (48−70%) by reacting the aldehyde with o -phenylenediamines in DMF at 120−150 °C (Scheme ).…”

Electrochromic Polymers

“…Its first electropolymerization was performed by Shaheen Taj and co-workers in 2000 on a Pt electrode using acetonitrile containing 0,1 M NaClO 4 . They proved that polymerization of benzimidazole and substituted benzimidazoles produce electroactive and conducting polymers [48].…”

Electrochromic Polymers

“…Its first electropolymerization was performed by Shaheen Taj and co-workers in 2000 on a Pt electrode using acetonitrile containing 0,1 M NaClO 4 . They proved that polymerization of benzimidazole and substituted benzimidazoles produce electroactive and conducting polymers[48].Previously reported DAD type polymers obtained by coupling benzazoles with electron donating EDOT resulted in fine tuned electrochromic properties. BTd derivative DAD polymer was synthesized[49] and later it was shown to be the first green to transmissive electrochromic polymer.…”