含嘧啶与芴结构单元共聚物的合成及性能  

Synthesis and Properties of Pyrimidine and Fluorene Containing π-Conjugated Copolymer

作　　者：赛亚尔·斯迪克 希尔艾力·买买提依明[1] 司马义·努尔拉[1] 肖开提·阿布力孜[1] 

机构地区：[1]新疆大学化学化工学院,石油天然气教育部重点实验室,乌鲁木齐830046

出　　处：《功能高分子学报》2014年第2期207-212,共6页Journal of Functional Polymers

基　　金：国家自然科学基金(21164012;51363020)

摘　　要：通过Suzuki偶联反应将2,7-双(4,4,5,5-四甲基-1,3,2-二氧杂硼烷-2-基)-9,9-二辛基芴与2-氨基-4,6-二碘嘧啶共聚,得到了一种新型共聚物聚(2-胺基嘧啶-9,9-二辛基芴)。采用红外光谱、核磁共振氢谱、紫外-可见吸收光谱、荧光光谱、循环伏安、热重分析等测试方法对共聚物进行了性能分析。结果表明:该共聚物有一定的热稳定性,在氯仿溶液中的激发峰位于390 nm,462nm和496 nm处出现了2个发射峰并在最大吸收波长下发射黄绿色荧光。共聚物的氯仿溶液存在酸致变色现象,加入CF_3COOH后,共聚物在390 nm处的吸收峰强度不断降低,并且在433 nm左右出现了一个新的吸收峰,溶液由淡黄色转变为绿色,UV-Vis吸收峰发生红移。A new type π-conjugated copolymer（4-methyl-6-（7-methyl-9,9-dioctyl-9H-fluoren-2-yl） pyri-midin-2-amine ）was prepared between 2,2′-（9,9-dioctyl-9H-fluorene-2,7-diyl） bis （4,4,5,5-tetramethyl-1,3,2-dioxaborolane） and 2-amino-4,6-diiodopyrimidine by Suzuki polycondensation . The structure of the copolymer was characterized by FT-IR, 1H-NMR, UV-Vis spectroscopy, fluorescence spectroscopy, cyclic voltammetry and thermal analysis. Results showed that the derived copolymer exhibited good thermal stability. The copolymer with UV-Vis absorption peak at 390 nm, and PL emission peak at 462 nm and 496 nm, emitted yello green light at the wavelength of the absorption maxima. The copolymer displayed acidichromic properties when protonated with CF3COOH acid in chloroform solutions and the red-shifted peaks were observed from 390 nm to 433 nm. The color of the chloroform CF3COOH solution changed from pale yellow to green.

关 键 词：SUZUKI偶联反应 共聚物 酸致变色 

分 类 号：O63[理学—高分子化学]