Abstract A series of novel blue light-emitting 1-alkyl-2-substituted benzimidazoles (4a-4g) were synthesized by reactions of the 2-substituted benzimidazoles (3a-3e) with ethyl bromide or n-butyl bromide as electrophilic reagent. Compounds 3a, 3c, 3e were synthesized by the condensation of 1a-1c with 1, 2-diamino benzene o-phenylene diamine using air as oxidizing agent and compounds 3b, 3d were synthesized by the condensation ...
