title: Green synthesis of polycyclic benzimidazole derivatives and organic semiconductors.
abstract: Polycyclic benzimidazole derivatives, an important class of compounds in organic electronics and photovoltaics, were prepared using a solvent-free "green" process based on heating carboxylic acid anhydrides and arylene diamines in the presence of zinc acetate in the solid state. Products were isolated and purified directly by train sublimation of the crude reaction mixtures. The reaction conditions were optimized using various carboxylic acid anhydrides. Optical and electrochemical properties of these materials are also described.
authors.affiliation: Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, USA.
authors.forename: Masashi
authors.initials: M
authors.lastname: Mamada
authors.forename: César
authors.initials: C
authors.lastname: Pérez-Bolívar
authors.forename: Pavel
authors.initials: P
authors.lastname: Anzenbacher
mesh_terms: D001562:Benzimidazoles / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D008968:Molecular Conformation; D011084:Polycyclic Aromatic Hydrocarbons / Q000138:chemical synthesis* / Q000737:chemistry; D012666:Semiconductors; D013237:Stereoisomerism
chemical_list: D001562:Benzimidazoles; D011084:Polycyclic Aromatic Hydrocarbons; C031000:benzimidazole