论文部分内容阅读
合成了一种新型单体2-N,N-二甲氨基-4,6-二氯嘧啶(ADNP)。以二氯-1,3-双(二苯基磷)丙烷基镍(Ⅱ)作催化剂,通过2,5-二溴噻吩格氏试剂与该单体共聚得到了一种新型共轭聚合物,聚[(2-N,N-二甲胺基嘧啶-4,6-二)-2,5-噻吩](PThPm)。采用FT-IR、1H-NMR等测试手段对新型单体与共聚物的结构进行了表征,并用UV-Vis、荧光光谱、X射线衍射、循环伏安、热重分析(TGA)等测试方法对单体和共聚物进行了性能分析。结果表明:共聚物在420nm处出现UV-Vis吸收峰,在528nm处出现荧光发射峰;共聚物的DMF溶液存在酸致变色现象,加入CF3COOH和CH3SO3H后,溶液由淡绿黄色转变为淡红色,UV-Vis吸收峰发生红移;PThPm共聚物有一定的结晶性和热稳定性;在-1.8~+1.8V之间出现电致变色现象,电极周围的溶液颜色从深蓝色变成深红色。
A novel monomeric 2-N, N-dimethylamino-4,6-dichloropyrimidine (ADNP) was synthesized. A novel conjugated polymer was obtained by copolymerization of 2,5-dibromothiophene Grignard reagent with dichloro-1,3-bis (diphenylphosphino) propane nickel (Ⅱ) as catalyst. Poly [(2-N, N-dimethylaminopyrimidin-4,6-bis) -2,5-thiophene] (PThPm). The structures of the novel monomers and copolymers were characterized by means of FT-IR and 1H-NMR. The structures of the copolymers were characterized by UV-Vis, fluorescence spectroscopy, X-ray diffraction, cyclic voltammetry and thermogravimetric analysis (TGA) Monomers and copolymers were subjected to performance analysis. The results showed that the UV-Vis absorption peak appeared at 420 nm and the fluorescence emission peak appeared at 528 nm. The copolymer solution showed acid-induced discoloration. After addition of CF3COOH and CH3SO3H, the solution changed from pale green to yellow, UV-Vis absorption peaks redshifted; PThPm copolymer has a certain degree of crystallinity and thermal stability; electrochromism occurs between -1.8 ~ + 1.8V, the color of the solution around the electrode changes from dark blue to dark red.