A Study On Synthesis Of Poly(2-Aryl)phenylenevinylenes

Poly(p-phenylenevinylene)s (PPVs) have received great attentionfor its assured luminescent structure, high quantum yield and excellentelectronphoto properties.In order to improve the hole-transporting ability of thelight-emitting poly(p-phenylenevinylene)s(PPVs), some series of novelpolymers containing hole-transporting aromatic amine units on thebackbone or as pendants were designed and synthesized. This thesisprovided two new routes to prepare triphenylamine-based PPVs withvarying chemical structures. Poly{[2-(4-biphenylamino)phenyl]pheny-lenevinylene} and poly{(2-4-[bi(4-tetrabutylphenylamino]phenyl)-phenylenevinylene} were synthesized.Poly{[2-(4-biphenylamino)phenyl]phenylenevinylene} was prep-ared with 4-nitroanline which was coupled with p-xylene,throughreduction,idionization,Ullmann reaction,bromization,condensepolymerizationto get the final product.The synthesis of poly{(2-4-[bi(4-tetrabutyl)phenylamino]phenyl)phenylenenvinylene} was beginwith 4-tetrabutylbenzoic,through acylation,Hoffmann rearrangement,bromization,idionization,Ullmann reaction,bromization,condensepolymerization.The two routes'characteristic is cheap crude product,mild reaction conditions and easily-operations.The thesis discussed the factors of Gombger-Bachmann reaction andoptimized the reaction conditions.In addition, discussed the effect on theyield of Ullmann reaction,such as the reaction reagent,temperature,reaction time.