Synthesis of novel chalcone derivatives and their stabilization effect of spiropyran in PMMA films  

作　　者：Zheng Kai Si Qing Zhang Min Zhao Xue Yuan Yuan Zhu Liang Ming Qiao Rong Sheng Yan Gang Liu 

机构地区：[1]School of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China

出　　处：《Chinese Chemical Letters》2011年第9期1025-1028,共4页中国化学快报（英文版）

基　　金：the financial support from the National High Technology Research and Development Program of China(No.2005AA320030);SJTU-Aeronautics Industry Joint Program(No.0304)

摘　　要：Three novel bis-chalcone derivatives with different alkyldioxy spacers were synthesized and dispersed into polymethyl methacrylate （PMMA） chloroform solution with 6-nitro-1＇-ethyl-3＇,3＇-dimethylspiro-2H-1-benzopyran-2,U-indoline （ESP） to prepare photochromic PMMA films in a facile way. After irradiation with 365 nm UV light, the photocrosslinking reaction between chalcone units was proved to retard the decolorization of merocyanine form of the photochromic spiropyran effectively, as results of the steric hindrance produced by photocycloaddition of chalcone groups. It has been found that the bis-chalcone molecule with the shortest spacer has the most effective stabilizing effect on retardation of decoloration of spiropyran. reserved.Three novel bis-chalcone derivatives with different alkyldioxy spacers were synthesized and dispersed into polymethyl methacrylate （PMMA） chloroform solution with 6-nitro-1＇-ethyl-3＇,3＇-dimethylspiro-2H-1-benzopyran-2,U-indoline （ESP） to prepare photochromic PMMA films in a facile way. After irradiation with 365 nm UV light, the photocrosslinking reaction between chalcone units was proved to retard the decolorization of merocyanine form of the photochromic spiropyran effectively, as results of the steric hindrance produced by photocycloaddition of chalcone groups. It has been found that the bis-chalcone molecule with the shortest spacer has the most effective stabilizing effect on retardation of decoloration of spiropyran. reserved.

关 键 词：PHOTOCHROMISM CHALCONE SPIROPYRAN PHOTOCYCLOADDITION Slabilization effect 

分 类 号：O625.42[理学—有机化学] TN204[理学—化学]