溴代吲哚啉螺苯并吡喃的合成及光致变色性质

Synthesis and photochromic properties of bromo substituent indolinobenzospiropyran compounds

合成了6,8-二溴-1′,3′,3′-三甲基螺([2H]苯并吡喃-2,2′-吲哚啉),用核磁共振氢谱、红外光谱、元素分析和熔点进行表征,并用X射线衍射仪进行物相分析。该化合物在丙酮中经365nm的紫外光照射,分子由闭环变成开环结构,颜色由无色变成蓝色,再用红外光照射或置于暗处,颜色变回到无色,表明目标化合物具有良好的光致变色性能。

A compound of 6,8-dibromo- 1＇, 3＇, 3＇-trimethyl-spiro [- 2 H-l-benzopyran-2,2＇-ind-oline] was designed and synthesized. The structure of the compound was characterized by ^1H-NMR, IR, elemental analysis,melting point and solid-phase analysis by X-ray power diffraetion. The color of the compound in acetone solution changed from colorle-ss to blue after irradiated by 365nm UV,and returned to colorless when the irradiation was stopped or in dark. This phenomenon occurrence is beeause the reversibility of the transformation between the colorless spiro forms and the colored merocyanines. The results indicated that the synthesized compound had a better photochromic property.