The synthesis, optical properties, electrochemical properties, electronic structures and applications in electroluminescent device of three series of 1, 3, 4-oxadiazole derivatives, 1, 4-bis [(4-methylphenyl)-1, 3, 4-oxadiazolyl] phenylene (OXD1), 5, 5′-di-(4-methyl)-2, 2′-p- (2, 5-bisalkoxyphenylene)-bis-1, 3, 4-oxadiazole (OXD2–n) and 1, 4-bis [(4-alkoxyphenyl)-1, 3, 4-oxadiazolyl] phenylene (OXD3–n) are reported. The molecular structures of the ...