Two novel electroluminescent copolymers have been synthesized
in which there are three functions:1
8 naphthalimide as emitting moiety
oxadiazole as electron transporting moiety and PVK as hole transporting moiety.The dyad monomers were characterized by 1H-NMR and MS spectra.Their UV Vis spectra indicate that there is little or no interaction between the two chromophores in their ground state.However
the fluorescence emission of oxadiazole and vinylcarbazole were quenched in these copolymers
which shows in the excited state there exists very effective intramolecular singlet-singlet energy transfer(Intra-SSET) from oxadiazole and vinylcarbazole to1