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Researchers discovered how some molecular crystals can bend and expand without breaking. Inside the crystals, neighboring molecules act like interconnected “scissors” that open and close in a coordinated way to absorb strain. Crystals with a balanced range of this motion showed large elastic bending and light-driven deformation, while structures already near fully open or closed states were more brittle.

https://onlinelibrary.wiley.com/doi/10.1002/anie.2931090
Wiley Online Library Mechanically Coupled Supramolecular Scissors Govern Photomechanical and Elastic Responses in Molecular Crystals Mechanically coupled supramolecular scissoring links crystal packing geometry to macroscopic mechanical response. Within a homologous crystal series, the initial scissor state governs the balance bet...
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