论文部分内容阅读
以1,3-二(二苯膦基)丙烷二氯化镍(Ⅱ)作催化剂[Ni(dpp)Cl2],通过2,5-二溴噻吩格式试剂与4,4′-二碘偶氮苯共聚得到了一种新型共轭聚合物.采用红外光谱、核磁共振氢谱对聚合物的结构进行表征并通过紫外-可见吸收光谱、荧光光谱、X-射线衍射、热失重分析(TGA)、差热分析(DTA)等测试手段对聚合物的性能进行了详细的研究.紫外可见光谱分析结果表明,聚合物在384 nm处显示了偶氮苯发色团的特征吸收峰,相对于单体红移34 nm.在聚合物的氯仿溶液中观察到酸致变色现象,即分别加入CF3COOH和CH3SO3H后,溶液颜色由黄色分别变成墨绿色和紫色,而加入三乙胺溶液后溶液恢复到初始颜色.在25℃下测得的特性粘数为0.53 dL/g.热失重分析结果显示,该聚合物具有较好的热稳定性.
Using bis (dibenzophosphino) propane nickel (II) as catalyst [Ni (dpp) Cl2] and 2,5-dibromothiophene standard reagent with 4,4’-diiodoazo Benzene was used to synthesize a new conjugated polymer.The structure of the polymer was characterized by FTIR and 1H NMR and the structure of the polymer was characterized by UV-Vis, fluorescence spectroscopy, X-ray diffraction, TG (thermal gravimetric analysis) Differential thermal analysis (DTA), etc. The UV-vis spectrum of the polymer shows that the characteristic absorption peak of azobenzene chromophore is at 384 nm, Red shift 34 nm. Acidic discoloration was observed in the polymer chloroform solution, ie the color of the solution changed from yellow to dark green and purple respectively after addition of CF3COOH and CH3SO3H, respectively, whereas the addition of triethylamine solution restored the initial color Color The intrinsic viscosity measured at 25 ° C was 0.53 dL / g, and the thermogravimetric analysis showed that the polymer had good thermal stability.