Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 2, Issue 16, Pages 2033-2037Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz2008769
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Funding
- Blaise Pascal International Chair award
- ARO [W911NF-09-1-0242]
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We present a multiscale physical mechanism and a stochastic model of breathing transitions, which represent adsorption-induced structural transformations between large-pore and narrow-pore conformations in bistable metal-organic frameworks, such as MIL-53. We show that due to interplay between host framework elasticity and guest molecule adsorption, these transformations on the level of the crystal occur via layer-by-layer shear. We construct a simple Hamiltonian that describes the physics of host-host and host-guest interactions and show that a respective Monte Carlo simulation model qualitatively reproduces the experimentally observed features of breathing transitions.
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