Synthesis and luminescence of novel emitting copolymers

Four novel dyad monomers containing two copolymerizable groups have been synthesized. They were copolymerized with N-vinyl carbazole and would be used as electroluminescent materials, in which there are three functional segments: 1,8-naphthalimide as emitter, oxadiazole as electron-transporting unit and carbazole as hole-transporting segments. The effective intramolecular singlet energy transfer from oxadiazole or carbazole to naphthalimide was observed from the emission spectra of the dyad monomers and copolymers.