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An alternative approach to loading metal organic frameworks with gas molecules at high (kbar) pressures is reported. The technique, which uses liquefied gases as pressure transmitting media within a diamond anvil cell along with a single-crystal of a porous metal-organic framework, is demonstrated to have considerable advantages over other gas-loading methods when investigating host-guest interactions. Specifically, loading the metal-organic framework Sc2BDC3 with liquefied CO2 at 2kbar reveals the presence of three adsorption sites, one previously unreported, and resolves previous inconsistencies between structural data and adsorption isotherms. A further study with supercritical CH4 at 3-25kbar demonstrates hyperfilling of the Sc2BDC3 and two high-pressure displacive and reversible phase transitions are induced as the filled MOF adapts to reduce the volume of the system.
Author(s): Sotelo J, Woodall CH, Allan DR, Gregoryanz E, Howie RT, Kamenev KV, Probert MR, Wright PA, Moggach SA
Publication type: Article
Publication status: Published
Journal: Angewandte Chemie International Edition
Year: 2015
Volume: 54
Issue: 45
Pages: 13332-13336
Print publication date: 02/11/2015
Online publication date: 11/09/2015
Acceptance date: 01/01/1900
ISSN (print): 1433-7851
ISSN (electronic): 1521-3773
Publisher: Wiley-Blackwell Publishing Ltd.
URL: http://dx.doi.org/10.1002/anie.201506250
DOI: 10.1002/anie.201506250
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