A new blue fluorescent aromatic diamine, 2-(4,4′-diamino-4″-triphenylamine)-5-(4-dimethylaminophenyl)-1,3,4-oxadiazole, is synthesized in several steps. Based on this diamine four fluorescent imide-type polymers, a polyimide and three poly(amide-imide)s, are prepared by solution polycondensation reactions. The structures of the monomers and polymers are characterized by FTIR and NMR spectroscopy. The polymers show good solubility in organic solvents, and have high thermal stability, the decomposition temperature being above 380 °C, as is determined by TGA measurements. The thermal degradation mechanism of a polymer in an inert atmosphere is investigated by using the coupled TG/MS/FTIR technique. The optical properties are determined by UV-vis and fluorescence spectroscopy. The polymers exhibit strong absorption bands in the range of 357–373 nm, and blue fluorescence in solution within the range of 423–469 nm with low to moderate quantum fluorescence yields from 0.11 to 1.30% and Stokes shifts values of around 77 nm. The protonation is found to affect the spectral properties of the polymers.

新的蓝色荧光芳族二胺2-（4,4'-二氨基-4''-三苯胺）-5-（4-二甲基氨基苯基）-1,3,4-恶二唑被合成。基于该二胺，通过溶液缩聚反应制备四种荧光酰亚胺型聚合物，聚酰亚胺和三种聚（酰胺-酰亚胺）。单体和聚合物的结构通过FTIR和NMR光谱表征。所述聚合物在有机溶剂中显示出良好的溶解性，并且具有高的热稳定性，如通过TGA测量所确定的，其分解温度高于380℃。通过使用耦合的TG / MS / FTIR技术研究了聚合物在惰性气氛中的热降解机理。光学性质通过紫外可见和荧光光谱法测定。聚合物在357–373 nm范围内显示出很强的吸收带，溶液中的蓝色荧光在423–469 nm范围内，低至中等的量子荧光产率在0.11至1.30％之间，斯托克斯位移值在77 nm左右。发现质子化影响聚合物的光谱性质。