9,9-二(丙酸十二氟庚酯)芴共聚物的合成及性能  

Synthesis and characterization of(9,9-bis(dodecafluoroheptylpropanoate)-2,7-fluorene)-co-2,7-(9,9-dioctylfluorene) copolymers

作　　者：贾正 吴迪 李坚 任强 汪称意 JIA Zheng;WU Di;LI Jian;REN Qiang;WANG Chen-yi(Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China)

机构地区：[1]江苏省环境友好高分子材料重点实验室常州大学材料科学与工程学院

出　　处：《高校化学工程学报》2019年第5期1213-1222,共10页Journal of Chemical Engineering of Chinese Universities

摘　　要：通过迈克尔加成反应合成单体2,7-二溴-9,9-二(丙酸十二氟庚酯)芴(FDFHP),采用Suzuki偶合反应制备不同FDFHP结构单元含量的含氟聚芴(PF8FDFHP)。通过红外光谱、核磁共振氢谱等方法对其结构和性能进行研究。结果表明:含氟侧链的引入能有效提高聚芴的疏水性,对聚合物的HOMO、LUMO能级没有太大的影响,但使得聚芴在440nm处的荧光发射峰逐渐消失,在500~600nm出现一个新的荧光发射峰。分析认为这是由于含氟侧链的引入使得聚芴的侧链产生结晶,主链之间堆砌更加致密而产生激基缔合物所致。通过不同浓度含氟聚芴溶液的荧光光谱与聚芴的DSC测试对此作了进一步分析。2,7-dibromo-9,9-bis(dodecafluoroheptylpropanoate)fluorene(FDFHP) was synthesized by Michael addition reaction, and fluorine-containing polyfluorenes(PF8 FDFHP) with different contents of FDFHP structural units were synthesized through Suzuki Coupling. The structure and properties of the polymers were characterized by FTIR and 1 H-NMR, et al. The results show that the hydrophobicity of the copolymers increases but HOMO and LUMO energy levels are not affected by introducing fluorine-containing side chains. The fluorescent emission peak at 440 nm disappeared, and a new fluorescent emission peak at 500~600 nm appeared after the introduction of the fluorine-containing side chain. This new emission peak was caused by the formation of excimers due to denser packing between the backbones of polyfluorene, which was induced by the introduction of the fluorine-containing side chain and the crystallization of the side chain. This phenomenon was further investigated by fluorescence spectra of different concentrations of PF8 FDFHP in THF and also DSC analysis.

关 键 词：含氟聚芴 Suzuki偶合反应 荧光光谱 疏水性聚芴 激基缔合物 

分 类 号：O631.3[理学—高分子化学]