Syntheses and Optical Properties of Perfluorophenyl Containing Benzimidazole Derivatives: The Effect of Donor Units

Abstract

Synthesis of two novel donor -acceptor -donor type monomers containing benzimidazole as the acceptor unit and thiophene and 3,4-ethylenedioxythiophene (EDOT) as the donor units were performed.imidazole were synthesized successfully and polymerized electrochemically. The electrochemical and spectroelectrochemical studies of the polymers were studied. The effect of electron donating moieties on the optical properties of electrochemically polymerized polymers was investigated. Both polymers were p type dopable and possessed multi-chromic property. Optical studies demonstrated that the polymer based on EDOT unit (P2) resulted in lower band gap since EDOT is higher electron donating group than thiophene.

Synthesis and characterization of new thiophene--benzimidazole-based electrochromes

“…It is obvious that the benzimidazole unit can be substituted by different alkyl or cyclic-aromatic units and each resulting benzimidazole shows different electro-optical properties, even if they are coupled with the same donor. 7,35,37,40 Thus, due to this main advantage, use of benzimidazole acceptors in donor-acceptor type of polymers will be continued in future studies.…”