Crystals springing into action: metal-organic framework CUK-1 as a pressure-driven molecular spring

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Abstract

Mercury porosimetry andin situhigh pressure single crystal X-ray diffraction revealed the wine-rack CUK-1 MOF as a unique crystalline material capable of a fully reversible mechanical pressure-triggered structural contraction. The near-absence of hysteresis upon cycling exhibited by this robust MOF, akin to an ideal molecular spring, is associated with a constant work energy storage capacity of 40 J g−1. Molecular simulations were further deployed to uncover the free-energy landscape behind this unprecedented pressure-responsive phenomenon in the area of compliant hybrid porous materials. This discovery is of utmost importance from the perspective of instant energy storage and delivery.

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Iacomi, P., Lee, J. S., Vanduyfhuys, L., Cho, K. H., Fertey, P., Wieme, J., … Yot, P. G. (2021). Crystals springing into action: metal-organic framework CUK-1 as a pressure-driven molecular spring. Chemical Science, 12(15), 5682–5687. https://doi.org/10.1039/d1sc00205h

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