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Pore shape modification of a microporous metal–organic framework using high pressure: accessing a new phase with oversized guest molecules

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Scott C. McKellar, Jorge Sotelo, Alex Greenaway, John P. S. Mowat, Odin Kvam, Carole A. Morrison, Paul A. Wright, Stephen A. Moggach

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Abstract

Pressures up to 0.8 GPa have been used to squeeze a range of sterically "oversized" C5-C8 alkane guest molecules into the cavities of a small-pore Sc-based metal?organic framework. Guest inclusion causes a pronounced reorientation of the aromatic rings of one-third of the terephthalate linkers, which act as "torsion springs", resulting in a fully reversible change in the local pore structure. The study demonstrates how pressure-induced guest uptake can be used to investigate framework flexibility relevant to "breathing" behavior and to understand the uptake of guest molecules in MOFs relevant to hydrocarbon separation.
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Original languageEnglish
Pages (from-to)466-473
Number of pages8
JournalChemistry of Materials
Volume28
Issue number2
DOIs
StatePublished - 26 Jan 2016

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