title: Electron-accepting conjugated materials based on 2-vinyl-4,5-dicyanoimidazoles for application in organic electronics.
abstract: We report the Heck coupling of 2-vinyl-4,5-dicyanoimidazole (vinazene) with selected di- and trihalo aromatics in an effort to prepare linear and branched electron-accepting conjugated materials for application in organic electronics. By selecting the suitable halo-aromatic moiety, it is possible to tune the HOMO-LUMO energy levels, absorption, and emission properties for a specific application. In this regard, materials with strong photoluminescence from blue --> green --> red are reported that may have potential application in organic light-emitting diodes (OLEDs). Furthermore, derivatives with strong absorption in the visible spectrum, coupled with favorable HOMO-LUMO levels, have been used to prepare promising organic photovoltaic devices (OPVs) when combined with commercially available semiconducting donor polymers.
authors.affiliation: Institute of Materials Research and Engineering (IMRE) and the Agency for Science, Technology and Research (ASTAR), 3 Research Link, 117602, Republic of Singapore.
authors.forename: Richard Y C
authors.initials: RY
authors.lastname: Shin
authors.forename: Prashant
authors.initials: P
authors.lastname: Sonar
authors.forename: Pei Sann
authors.initials: PS
authors.lastname: Siew
authors.forename: Zhi-Kuan
authors.initials: ZK
authors.lastname: Chen
authors.forename: Alan
authors.initials: A
authors.lastname: Sellinger