Synthesis and characterization of novel polyesters and polyurethanes containing 9,10-diethynylanthracene and pyromellitic diimide

A Novel monomer 9,10-bis(4-hydroxy-1-butynyl)anthracene (M1) was synthesized and some polyesters and polyurethanes containing a donor 9,10-diethynylanthracene and acceptor pyromellitic diimide groups were prepared. The polymers were soluble in common organic solvents and gave transparent films by casting. They showed 5% weight loss at the temperature 250-300 degrees C. All polymers showed luminescence and maximum depended on polymer composition. Polymers containing the 9,10-diethynylanthracene moiety alone showed luminescence with maximum at 470-480 nm while those containing 9,10-diethynylanthracene and pyromellitic diimide groups showed luminescence with maximum around 600 nm due to the charge transfer complex (CTC) formation between them. Some polymers showed electroluminescence with turn-on voltage of 10.5 V.