Synthesis And Characteristics Of Pyrene-Briged Ladderlike Polyphenylsiloxane

Current, great interest has been focused on organic electroluminesce-nt materials. Pyrene is an important blue light-emitting material, which has a high fluorescence quantum efficiency. However, pyrene derivatives of small molecules as organic electroluminescent materials have poor solubility, short light-emitting lifetime and difficult to make film. Pyrene derivative as a functional unit was built as a new organic electroluminescent material in this project to solve the defficults.1. Firstly, three kinds of small molecule pyrene derivatives were synthesized:Their chemical structures were characterized by 1H-NMR and FT-IR; The thermodynamic and fluorescence properties were detected by DSC, PL, UV-Vis methods. 2. Diaminopyrene bridged ladderlike Polyphenylsiloxane (Ph-LP) was synthesized suceessfully by means of "Supramolecular architecture-directed-stepwise coupling polymerization". The monomer unit self-assembled into ladder superstructure (Ph-LS) by concerted interaction of hydrogen bonding and aromaticπ-πstacking. The monitoring datas of 29Si-NMR, XRD, FT-IR show that the polymer has a certain regularity; The datas of DSC, PL show that the polymer has good thermal stability and fluorescence.The synthetic method of hydrogen bonds self-assembly with pyrene derivatives as the ladder supporting paves a new way for synthesis of organic electroluminescent materials.