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Herein, an elastic crystal of a barbiturate derivative was found to be an excellent candidate, demonstrating plastic bending behavior under natural sunlight irradiation. <jats:sup>1<\/jats:sup>H NMR and high\u2010resolution mass spectrum data of microcrystals before and after light irradiation demonstrated that light\u2010induced [2+2] cycloaddition was the driving force for the photomechanical effects. Interestingly, the crystals retained elastic bending even after light irradiation. This is the first report of flexible crystals that can be driven by natural sunlight and that have both photomechanical properties and elasticity. Furthermore, regulation of the passive light output direction of the crystals and transport of objects by applying mechanical forces and light was demonstrated.<\/jats:p>","DOI":"10.1002\/anie.202311348","type":"journal-article","created":{"date-parts":[[2023,10,13]],"date-time":"2023-10-13T03:15:23Z","timestamp":1697166923000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":49,"title":["Mechanical Effects of Elastic Crystals Driven by Natural Sunlight and Force"],"prefix":"10.1002","volume":"62","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7062-6493","authenticated-orcid":false,"given":"Jiang","family":"Peng","sequence":"first","affiliation":[{"name":"Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education &amp; School of Chemistry and Materials Science of Shanxi Normal University  030032 Taiyuan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chuchu","family":"Han","sequence":"additional","affiliation":[{"name":"Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education &amp; 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