【摘要】 利用过量Fischer碱与3,5-二溴水杨醛反应合成了4-(2-亚甲基-1,3,3-三甲基吲哚啉-2′-基)-6,8-二溴-1,3′,3′-三甲基-螺[3,4-二氢-2H-1-苯并吡喃-2,2′-吲哚啉],经元素分析、红外光谱、核磁共振氢谱和熔点确认了其化学结构。利用紫外-可见光谱和荧光光谱对目标化合物的吸收光谱和光致发光光谱进行了研究,探索了目标产物的光致变色性能。结果表明,该化合物较相应单缩合螺吡喃多了1个吲哚单元且熔点提高了50℃,其紫外-可见吸收光谱中开环体在555nm处有最大吸收波长,荧光光谱中在433nm处可观察到荧光。更多还原

【Abstract】 A compound of 4-(2-Methylene-1,3,3-trimethylindoline-2′-yl)-6,8-dibromo-1′,3′,3′trimethylspiro[3,4-dihydro-2H-1-benzopyran-2,2′-indoline] obtained from reaction of excess Fischer base with 3,5-dibromosalicylaldehyde.The structure of the compound was characterized by 1H-NMR,IR,elemental analysis and melting point.By means of UV-Vis and fluorescence spectrometers,the absorption and emission spectra of the title compound were studied and its photochromic properties were researched.The results showed that the title compound more than the corresponding spiropyran one indoline ring system and had a melting point of 50℃ improved.It’s general significant shifts in the λmax=555nm of the absorption spectra of the open form and emission fluorescene properties were observed at 433nm.更多还原