Synthesis and properties of poly[2,6-(p-phenylvinyl)-4-(4'-octyloxybiphenyl-4-yl)quinoline]

Summary

A novel polyquinoline (PQDBP8) containing the pendent 4'-octyloxybiphenyl group in the 4-position of the quinoline ring was prepared by the acid-catalyzed polymerization (Friedländer quinoline synthesis) of 1-(4-{2-[4-amino-3-(4'-octyloxybiphenyl-4-carbonyl)-phenyl]vinyl}phenyl)ethanone (6). PQDBP8 showed highly thermal stability (T_d= 384 °C, T_g= 183 °C). PQDBP8 showed blue fluorescence in dilute solution (λ_max= 449 nm) and green fluorescence in solid state (λ_max= 494, 540 nm) due to excimer formation. EL spectrum of PQDBP8 lies in the green region (λ_max= 572 nm) and PQDBP8/PVK blend film lies in the blue region (λ_max= 446 nm).