Abstract
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.
基金项目
National Natural Science Foundation of China(22105071)
National Natural Science Foundation of China(22375063)
Project of the Science and Technology Commission of Shanghai Municipality,China(22ZR1417100)
Project of the Science and Technology Commission of Shanghai Municipality,China(23JC1401700)
Fundamental Research Funds for the Central Universities,China(B16017)
NETL
NSTL
万方数据