文献类型：期刊文献

英文题名：Shape Dependence of Photoresponsive Molecular Crystals Composed of Naphthyl Acrylic Acid Stimulated by Solid-State [2+2] Photocycloaddition

作者：Li, Tian-Yuan;Du, Yu-Ze;Xu, Tian-Yi;Zhang, Tian-Le;Tong, Fei[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn, Joint Int Res Lab Precis Chem & Mol Engn,Feringa N, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：14

期号：6

外文期刊名：CRYSTALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001254664500001)】；

基金：This research was funded by the National Natural Science Foundation of China (NSFC) (grant no. 22105071 and 22375063), the Science and Technology Commission of Shanghai Municipality (grant no. 22ZR1417100 and 23JC1401700), and the Fundamental Research Funds for theCentral Universities.

语种：英文

外文关键词：fluorescence; crystal growth; crystal engineering; photochemistry; [2+2] cycloaddition

摘要：Photomechanical molecular crystals, actuated by solid-state photochemical reactions, manifest a spectrum of mechanical motions upon light exposure, underscoring their prospective integration into the next generation of intelligent materials and devices. Utilizing the solid-state photodimerization of naphthyl acrylic acid as a paradigm, this study delved into the interplay between crystal morphology and reaction dynamics on the photomechanical responses of molecular crystals. Distinct crystal forms-bulk, microrods, and microplates-were cultivated through tailored crystallization conditions. While bulk crystals of naphthyl acrylic acid (NA) underwent shattering and splintering upon UV light exposure, the microplate counterparts displayed unique cracking patterns with fissures yet retained their overall structural integrity. In contrast, NA microrods underwent pronounced bending under identical irradiation conditions. These phenomena are attributed to the efficient lattice reconfiguration stemming from the [2 + 2] cycloaddition photochemical reaction within the crystals. An intermediate fluorescence enhancement was observed across all crystal types upon light exposure. Collectively, our results underscore the pivotal role of crystal shape in dictating photomechanical behavior, thereby heralding novel strategies for developing advanced photomechanical materials.