1,3,4-噁二唑键联二芳基乙烯化合物的合成及性质

Synthesis and Properties of Two Photochromic Diarylethenes Containing 1,3,4-Oxadiazoles

将1,3,4-噁二唑基团引入二芳基乙烯分子中,合成了2种新的二芳基乙烯类光致变色化合物1-氰基-2-(2H-5-苯基-1,3,4-噁二唑)-1,2-二(2,4,5-三甲基-3-噻吩)乙烯(3)和1,4-二{[1-氰基-2-(2H-5-苯基-1,3,4-噁二唑)-1,2-二(2,4,5-三甲基-3-噻吩)乙烯]-1,3,4-噁二唑}苯(4).通过IR,NMR,MS和元素分析对化合物进行了结构表征,并研究了其UV-Vis吸收、荧光发射、动力学特性和抗疲劳性质.实验结果表明,化合物3和4具有良好的光致变色性质,光致变色闭环反应为零级反应,开环反应为一级反应.

Two novel photochromic dithienylethenes compounds,（E）-3-（5-phenyl-1,3,4-oxadiazol-2-yl）-2,3-bis（2,4,5-trimethylthiophen-3-yl）acrylonitrile（3） and（Z）-3-[5-（4-{5-[（E）-2-cyano-1,2-bis（2,4,5-trimethylthiophen-3-yl）vinyl]-1,3,4-oxadiazol-2-yl}phenyl）-1,3,4-oxadiazol-2-yl]-2,3-bis（2,4,5-trimethylthiophen-3-yl）acrylonitrile（4） containing 1,3,4-oxadiazoles,were synthesized.Their structures were confirmed by IR,NMR,MS and elemental analysis.Moreover,their UV-Vis absorption properties,fluorescent properties,photochromic dynamics character and fatigue resistance were studied.The results indicated that they processed good photochromic behavior,and their cyclization and cycloreversion reactions were zeroth and first order reaction,respectively.