含偶氮苯基元对称双噁二唑衍生物的合成及其发光性能

合成了含偶氮苯基元的对称双噁二唑衍生物Fn，利用IR、1H NMR方法确认了其分子结构，用荧光光谱研究了偶氮苯基元对噁二唑衍生物光致发光特性的影响。 F3、F6、F10的发射峰皆为双峰，分别位于348、356 nm和345、357 nm及345、357 nm，属于噁二唑基团的特征发射峰。 偶氮苯基元的引入，对噁二唑衍生物Fn在溶液中的最大发射峰位影响较小，对发光强度影响较大，其发光强度大大降低。 这主要是由于在光激发过程中偶氮苯基团与噁二唑基团间发生了分子内电子能量转移。

Synthesis and Photoluminescence of the Derivatives of Symmetrical Bi-oxadiazoles Containing Azobenzene

A series of derivatives of symmetrircal bi-oxadiazoles containing azobenzene was synthesized. Their molecular structures were determined by IR and 1H NMR spectroscopies. The effect of azobenzene on the photoluminescence of oxadiazole derivatives was carefully studied by fluorescence spectra. The emission peaks of F3, F6 and F10 are bimodal, at 348, 356 nm and 345, 357 nm and 345, 357 nm, respectively, attributed to the oxadiazole groups of bi-oxadiazoles. The introduction of azobenzene has less impact on the emission maximum peak of oxadiazole derivatives Fn in solution, but the luminous intensity of oxadiazole derivatives Fn decreases. This is mainly because of the intramolecular electronic energy transfer between the azobenzene groups and the oxadiazole groups in the process of photoexcitation.