Tris(8-hydroquinolinato) aluminum(Alq

3

) is one of the best electroluminescent materials with excellent electrontransporting ability Integrating holetransporting segments and Alq-3 into the same polymer may effectively improve the electroluminescent properties of Alq-3 because of more balanced charge transports of both carriers Two methacrylate monomers containing 8-hydroxyquinoline or carbazole group were synthesized

respectively Then

a series of copolymers

containing both 8-hydroxyquinoline and carbazole side groups with different ratios

were synthesized by the copolymerization of these two monomers with different ratios initiated by AIBN at 60 ℃ for 72 h The obtained copolymers were characterized by 1H NMR and GPC analyses The total conversions of monomers were around 90%

and the molecular weights (

M

n) of the copolymers were between 14000 and 20000 The obtained copolymers were then complexed with di(2-methyl-8-hydroquinolinato)ethylaluminum (EtAlq'2) to give copolymers containing both Alq-3 and carbazole side groups The optical properties of the obtained polymeric complex were investigated by UVvis and photoluminescence spectroscopy The results showed that the absorption of carbazole trail off and the absorption of Alq-3 increased with the increasing ratio of Alq-3 The emission intensity increased with increasing ratio of Alq-3

and the

λ

max in emission was redshifted with increasing ratio of carbazole side group