Synthesis and optical properties of novel pyrido[1,2-a]benzimidazole-containing 1,3,4-oxadiazole derivatives

► The first report about the unique optical properties of pyrido[1,2-a]benzimidazole heteroaromatic compounds containing 1,3,4-oxadiazole unit. ► Synthesis of pyrido[1,2-a]benzimidazole moiety via a novel efficient tandem reaction. ► The target heterocyclic compounds showing high quantum yields of fluorescence, with great potential for use as fluorescent pigments and in optical/electro devices.