Synthesis And Characterization Of Oxadiazole-Bridged Ladderlike Polyphenylsiloxane

Some 1,3,4-oxadiazole derivatives which containing active groups were designed and synthesized, then the novel oxadiazole-bridged ladderlike polyphenylsiloxane was synthesized by the super-molecular chemistry-controlled stepwise coupling polycondensation (SCP) method. This material has the both advantages of 1,3,4-oxadiazole monomer and ladder polymers, which will become a new type of composite electroluminescent material.The main research results are the following:1.For the purpose of synthesis of oxadiazole-bridged ladderlike polyphenylsiloxane, The monomer 1,4-Bis[(4-allyloxyphenyl)-1,3,4-oxadiazolyl]phenylene (M1) has been prepared in this paper. The best synthesis method was established via comparison of different reaction conditions, and then the structure and photoluminescence spectrum of Ml was characterized.2. Another monomer 2,5-bis-(4-aminophenyl)-1,3,4-oxadiazole (M2) has been prepared in this paper. The best synthesis method was established via comparison of synthetic route and reducing agent. The structure and photoluminescence spectrum of M2 was characterized.3.2,5-bis-(4-aminophenyl)-1,3,4-oxadiazole-bridged ladderlike polyphenylsiloxane (OXD-Ph-OLPS) has been prepared via SCP, The structure of OXD-Ph-OLPS was characterized by XRD, FI-IR,29Si-NMR, VPO and PL. The data show that the polymer has well-defined ladderlike structure and good blue fluorescence.