2-甲基-8-羟基喹啉-丙烯酸-镓(Ⅲ)与甲基丙烯酸甲酯共聚物的合成与表征

SYNTHESIS AND CHARACTERIZATION OF 2-METHYL-8-HYDROXYQUINOLINE GALLIUM ACRYLATE AND METHYL METHACRYLATE COPOLYMERS

制备了 2 甲基 8 羟基喹啉、丙烯酸与镓 (Ⅲ )的三元配合物 ,将此配合物与甲基丙烯酸甲酯共聚后得到含镓 (Ⅲ )的共聚物 ,这种共聚物易溶于氯仿、丙酮等普通低沸点溶剂 ,具有良好的成膜性能 .用红外光谱、元素分析、紫外光谱等方法对三元配合物和共聚物的组成进行了表征 .测试三元配合物和共聚物的荧光光谱 ,表明共聚物在 4 96nm处能发出较强的荧光 .DSC和TG分析表明 ,共聚物具有良好的耐热性和热稳定性 .

A new copolymer of 2-methyl-8-hydroxyquinoline gallium acrylate and methyl methacrylate was prepared. The composition and properties of the copolymers were characterized by FT-IR, UV-vis, DSC, TG and fluorescence spectroscopy. A strong, blue-green photoluminescence with maximum at 496 nm was observed for the copolymer/CHCl3, solution. Effects of monomer ratio and concentration on photoluminescence properties of the copolymer were investigated. The results showed that the maximum fluorescence intensity was attained when Ga(Mq)(2)A: MMA was 1 : 20. While the wavelength of maximum excitation was approximately 263 nm when the concentration of the copolymer was under 2 g/L, but the wavelength of maximum excitation moved to 365 nm after the concentration was above 4 g/L. The copolymer is soluble in chloroform, acetone and DMF at 25 degreesC, so it can be used to prepare electroluminescent device by spin-coat technology. DSC analysis showed that T-g of the copolymer was 35 K higher than that Of PMMA, and the results of TG indicated that the decomposition temperature of PMMA was 140 degreesC, but that of the copolymer exceeded 250 degreesC, so the copolymer exhibited better thermal stability than PMMA.