| In the thesis, nine novel PPV derivates were designed, and seven PPVS were successfully synthesized through Gilch or Wittig reaction. The structure of resulting polymers were derminted by 1H-NMR and Elememt Analysis (EA). The photophysical and thermal properties were investigated. The main work is concentrated on the following aspects:1. The polymers (P1,P2) containing phenyl and thiophene in main chain were designed and synthesized via Wittig reaction. The ideal polymer has not been gotten, we just got some oligomers.2. A novel kind of hyper-branched copolymer, poly(1,2,4,5- tetravinylenephenylen-co-2-methoxy-5-(2'-ethylhexyloxy)-p-phenyelenevinylene) ( P3, P4, P5) were synthesized by the Gilch polymerization with different monomer ratio, and were characterized by 1HNMR and Elemental Analysis (EA). P3, P4, P5 showed excellent solubility, good film-formation ability, and high thermal stability. The UV-vis and PL of P3, P4, P5 were blue-shifted on comparison with those of MEH-PPV. The absorption maxima were blue-shifted with the increasing content of 1,3,4,5-substituted benzene rings.3. A novel kind of hyperbranched copolymer,poly(3,6-dinitro-1,2,4,5-tetratinylenephenylen-co-2-methoxy-5-(2-ethylhexyloxy)-p-phenyelenevinylene) P6, P7 and P8 was synthesized by the Gilch polymerization with different monomer ratio and were characterized with 1HNMR and Elemental Analysis (EA), UV-vis, and photoluminescence (PL) properties of P6, P7, P8 were investigated. The resulting polymers held good film-formation ability and high thermal stability.4. A novel kind of hyper-branched copolymer, poly(1,2,4,5-tetraphenylenevinylene-co-2-methoxy-5-(2'-ethylhexyloxy)-p-phenylveneinyle-co-2,3 -dinitro-p-phenyelenevinylene) (P9) was synthesized by the Gilch polymerization. and were characterized by 1HNMR and Elemental Analysis (EA), UV-vis, and photoluminescence (PL) properties of P9 was investigated. The polymer held good film-formation ability and high thermal stability. |
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