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以硫代二甘酸和取代苯甲腈为原料,经酯化、环化、酸化等反应合成了2,5-双[3-苯基-1,2,4-噁二唑-5-基]-3,4-二丁氧基噻吩衍生物,通过1HNMR、FTIR和元素分析进行了结构表征,并考察了该系列化合物的紫外-可见吸收光谱、荧光发射光谱及电化学性质。该系列化合物紫外吸收出现在240～250nm和320～350nm两个波段;荧光发射峰位于395～401.5nm,且随苯环上取代基供电子性的增强而规律性红移;循环伏安测定结果表明,该系列化合物中ⅧA、ⅧB、ⅧC和ⅧF具有高于常用电子传输材料2-(4-联苯基)-5-对叔丁基苯基-1,3,4-噁二唑(PBD)的电子亲和势,因而该类化合物的研究,对设计小分子类电致发光材料有重要意义。
Using thioglycolic acid and substituted benzonitrile as raw materials, 2,5-bis [3-phenyl-1,2,4-oxadiazol-5-yl] -3,4-dibutoxythiophene derivatives were synthesized and characterized by 1HNMR, FTIR and elemental analysis. The UV-Vis absorption spectra, fluorescence emission spectra and electrochemical properties of the compounds were also investigated. The UV absorption of these compounds appeared in two wavelength bands of 240 ~ 250nm and 320 ~ 350nm. Fluorescence emission peak was located at 395 ~ 401.5nm and redshifted regularly with the enhancement of electron donors on the benzene ring. The results of cyclic voltammetry The results show that the series of compounds VIIIA, VIIIB, VIIIC and VIIIF have higher than the commonly used electron transport material 2- (4-biphenylyl) -5-tert-butylphenyl-1,3,4-oxadiazole (PBD ) Of the electronic affinities, so the study of these compounds, the design of small molecular electroluminescent materials of great significance.