Two novel photochromic dithienylethenes compounds, (E)-3-(5-phenyl-l ,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 j phenyl) -1,3,4-oxadiazol-2-yl ] -2,3 -bis (2,4,5 -trimeth-ylthiophen-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.%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-嗯二唑)-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.
展开▼
