Photoinduced Bending and Curling Motions in Molecular Microcrystals of Naphthyl Meldrum’s Acid Derivative Based on E-to-Z Photoisomerization  

作　　者：ZHANG Xiaowen XU Tianyi ZHANG Chenchen TONG Fei 

机构地区：[1]Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai,200237,P.R.China

出　　处：《Chemical Research in Chinese Universities》2024年第5期907-913,共7页高等学校化学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22105071,22375063);the Project of the Science and Technology Commission of Shanghai Municipality,China(Nos.22ZR1417100,23JC1401700);the Fundamental Research Funds for the Central Universities,China(No.B16017).

摘　　要：Dynamic photoresponsive molecular crystals are promising candidates for making intelligent devices and materials in the future.Here,we synthesized a new photoactive molecule(E)-2,2-dimethyl-5-[3-(naphthalen-1-yl)allylide]-1,3-dioxane-4,6-dione[(E)-DNADD]that undergoes an E-to-Z photoisomerization in both liquid solution and solids when exposed to visible light(405 nm).Compared to the bulk crystals,the photoresponsive behavior in microcrystals was profoundly improved.Highly crystalline(E)-DNADD microplate crystals exhibit robust motions,including bending,curling,and coiling under light irradiation.The photoproduct conversion of the photochemical reaction in the microplate is no more than 20%,while the large bending curvature of the coiled illuminated samples was estimated at approximately 150–300 mm−1,comparable to some photoactive nanowires.Our results indicate that shrinking crystal dimensions can boost the photoresponses in molecular crystals and provide a facile strategy for developing dynamic molecular crystals at the microscopic scale.

关 键 词：Photochemistry Molecular crystal E-to-Z photoisomerization Photoinduced motion 

分 类 号：O62[理学—有机化学]