New quinoline-based alternating copolymers containing a fluorene unit

Two new polyquinolines, designated as POF66 and P1F66, containing a 9,9-di-n-hexylfluorene unit in the main chain were synthesized using Friedlander quinoline synthesis. The resulting polymers were found to be thermally stable with initial decomposition temperatures over 420°C. POF66 showed emission maxima at 404 nm in dilute solution and at 414 nm in thin film. P1F66 showed blue fluorescence in the dilute solution state and green fluorescence in the solid state. The electroluminescence spectra of both polymers were observed in the blue and green regions.