【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、
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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。
4- (2-Methylene-1,3,3-trimethylindolin-2’-yl) -6,8-bis Bromo-1,3 ’, 3’-trimethyl-spiro [3,4-dihydro-2H-1-benzopyran-2,2’-indoline] Resonance hydrogen spectrum and melting point confirm its chemical structure. The absorption and photoluminescence spectra of the target compounds were studied by UV-Vis and fluorescence spectroscopy, and the photochromic properties of the target compounds were explored. The results show that the compound has one more indole unit than the corresponding monosubstituted spiropyran and the melting point increased by 50 ℃. The UV-visible absorption spectrum of the compound has the maximum absorption wavelength at 555 nm and the fluorescence spectrum at 433 nm Fluorescence can be observed.
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