| Atom transfer radical polymerization (ATRP) is the most attractive and dynamic branch of living radical polymerization. ATRP has been frequently applied to synthesize various functional polymers with specific structures and special properties. In the present thesis, ATRP was employed as a fundamental methodology for the preparation of end-group functionalized and side-chain functionalized light-emitting polymers. Chelate chromophores and low molecular weight organic chromophores were introduced into polymer system, which integrated the photophysical merits of chelates or organic chromophores into polymer and simultaneously solved the small chromophores' problem of stability and solubility. The obtained polymers could be easily processed into stable and uniform thin films by spin-coating. The easy film forming of these polymers is practically useful for the prospective application in light emitting devices.1. In this paper, a functional initiator, 5-chloromethyl-8-hydroxyquinoline was chosen to initiate the ATRP of styrene. The obtained polystyrene contained 8-hydroxyquinoline as the end group and possessed controllable molecular weight and narrow molecular weight distribution. The obtained polymers were used as macroligand to participate in the coordination reaction with Zn~2+. The obtained polymeric complexes contained unsaturated complexof 8-hydroxyquinoline and Zn~2+ as the end group. Zn content in the polymeric complexes was determined by ICP. Introduction of Zn~2+ onto polymer's terminal greatly enhanced the fluorescent emission intensity of the polymers.2. Microwave irradiation was employed to accelerate the reaction between Zn~2+ and polymer's terminal 8-hydroxyquinoline. The coordination reaction was greatly enhanced by the assistance of microwave irradiation. In a very short time, a high yield of polymeric complexes could be obtained. Zn content in polymeric complexes prepared by assistance of microwave irradiation for even 6 minutes was higher than that preparedby conventional heating for 5 hours.3. The unsaturated complexes of Zn2+ and 8-hydroxyquinoline end group of polystyrene were modified by second organic ligands, 2-aminobenzoic acid, 1,10-phenthranoline and 8-hydroxyquinoline to prepared Zn(II) based mixed polymeric complexes. The mixed polymeric complexes of Zn(II) exhibited favorable fluorescent properties. The luminescent properties of mixed could be tuned by using different second ligands. Introduction of Zn(II) based mixed complexes to polymer system through coordination bond effectively ameliorated the photophysical stability of the chelate chromophores. The mixed complexes in polymer system possessed longer exciton life time than that of corresponding low molecular weight complex. The macroligands herein conferred the mixed polymeric complexes favorable solubility and ease of film forming. The mixed polymeric complexes could be easily processed into thin films and the thin films also exerted favorable fluorescent properties.4. Cmplexes of Eu3+ and Sm3+ with p-diketone, EuCl(TTA)2 ? 2H2O , SmCl(TTA)2 ?2H2O,EuCl(DBM)2 <2H2O#I Sm(DBM)2 <2H2O, were synthesized. These complexes were bonded to polymeric ligands through the coordination reaction between trivalent rare earth and the terminal 8-hydroxyquinoline. Polymers containing Eu(III) or Sm(HI) complexes as end group was strongly emissive and the intensive specific emission bands respectively ascribed to Eu3+ or Sm3+ could be observed in the fluorescent emission spectra. Due to the protection of macroligands to chromophores, the polymeric rare earth complexes were strongly emissive, although the concentrations of chromophores were very low. The application of macroligands also led to favorable solubility and easy film forming of polymeric complexes. The films of polymeric Eu(III) and Sm(III) both possessed satisfactory luminescent properties. Polymeric complexes of Eu(III) and Sm(III) both possessed specific emission bands in red light zone as well as emission bands of polystyrene in light zone, which coincided with absorbance spectra of chlorophyll. So the mixed polymeric complexes of Sm(IH) and Eu(III) could be used as light conversion agent to convert part of the UV light in sunlight to red and blule light, meeting the need of photosynthesis process.5. The coordination reactions of Eu(III) and Sm(HI) with polystyrene's terminal 8-hydroxyquinoline unit were also accelerated by assistance of microwave irradiation. If the reaction was conducted under microwave irradiation only for 5 minutes, the obtained polymeric complexes could possessed intense specific emission bands of Eu3+or Sm3+. While it must take 3 hours or more to get the same emission intensity for polymeric complexes if the reactions were conducted by conventional heating.6. In this paper five styrenic monomers, 4-vinylstilbene (VS), 4'-N,N-dimethylamino-4-vinylstilbene (DMAVS), 4'-N,N-diethylamino -4-vinylstilbene (DEAVS), 4-(2-naphthyl)vinylstyrene (NVS) and 4-(2-anthryl)vinylstyrene (AVS) were synthesized through heterogeneous Wittig reaction between triphenyl-4-vinylbenzylphosphium chloride and five different aromatic aldehyde. The wittig reaction were catalyzed by phase transfer catalyst and conducted in biphase system. The five monomers all possessed favorable fluorescent properties. Substitution of electron donating group onto VS and the extension of conjugation length both led to red shift of emission bands, enhancement of emission intensities and fluorescent quantum yield.7. The five monomers containing conjugate chromophores as pendant side chain all could be polymerized through ATRP. The obtained homopolymers all possessed controllable molecular weight and narrow molecular weight distribution.8. The homopolymers of VS, DMAVS, DEAVS, NVS and AVS all exhibited favorable fluorescent properties. Five homopolymers all could be dissolved in common solvent and could be easily processed into thin film by spin coating. The films of the five homopolymers also exerted strong luminescent properties.
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