含噻吩环1,2,4-噁二唑类衍生物的合成及光电性能

The Synthesis,Optical and Electrochemical Properties of 1,2,4-Oxadiazole Derivatives Carrying a Thiophene Unit

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。

2, 5-Bis [3-phenyl-1, 2, 4-oxadiazol-5-yl]-3, 4-dibutoxythiophene derivatives were synthesized, and their structures were confirmed by ^1HNMR, FFIR and elementary analysis. Their UV - Vis absorption, photoluminescence and electrochemical behavior were studied. UV - Vis absorption peaks are located at 240 - 250 nm and 320-350 nm, PL emission peaks are located between 395-401.5 nm, and the red shift reflects the effects of electron-donor character of 1,2,4-oxadiazole derivatives. Cyclic vohammetry measurements indicate that these compounds （ⅧA, ⅧB,ⅧC,ⅧF） have high electron affinity as compared to 2-（ 4-biphenyl）-5-（p-tert-butylphenyl）-1,3,4-oxadiazole （PBD）. Studies of synthesis and optical and electrochemieal properties of this series of compounds are important to molecule designs of electroluminescence materials used for electron transfer.