Volume 54, Issue 45 pp. 13332-13336
Communication

Locating Gases in Porous Materials: Cryogenic Loading of Fuel-Related Gases Into a Sc-based Metal–Organic Framework under Extreme Pressures

Jorge Sotelo

Jorge Sotelo

EaStChem School of Chemistry and Centre for Science at Extreme Conditions, University of Edinburgh, David Brewster road, Joseph Black Building, Edinburgh EH9 3FJ (UK)

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Dr. Christopher H. Woodall

Dr. Christopher H. Woodall

School of Engineering and Centre for Science at Extreme Conditions, University of Edinburgh, Peter Gurthrie Tait Road, Erskine Williamson Building, Edinburgh EH9 3FD (UK)

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Dr. Dave R. Allan

Dr. Dave R. Allan

Diamond Light Source, Harwell Campus, Didcot, OX11 ODE (UK)

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Eugene Gregoryanz

Eugene Gregoryanz

School of Physics and Centre for Science at Extreme Conditions, University of Edinburgh, Peter Gurthrie Tait Road, Erskine Williamson Building, Edinburgh EH9 3FD (UK)

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Dr. Ross T. Howie

Dr. Ross T. Howie

School of Physics and Centre for Science at Extreme Conditions, University of Edinburgh, Peter Gurthrie Tait Road, Erskine Williamson Building, Edinburgh EH9 3FD (UK)

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Konstantin V. Kamenev

Konstantin V. Kamenev

School of Engineering and Centre for Science at Extreme Conditions, University of Edinburgh, Peter Gurthrie Tait Road, Erskine Williamson Building, Edinburgh EH9 3FD (UK)

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Dr. Michael R. Probert

Dr. Michael R. Probert

School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU (UK)

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Prof. Paul A. Wright

Prof. Paul A. Wright

EaStCHEM School of Chemistry, Purdie Building, University of St. Andrews, St. Andrews KY16 9ST (UK)

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Dr. Stephen A. Moggach

Corresponding Author

Dr. Stephen A. Moggach

EaStChem School of Chemistry and Centre for Science at Extreme Conditions, University of Edinburgh, David Brewster road, Joseph Black Building, Edinburgh EH9 3FJ (UK)

EaStChem School of Chemistry and Centre for Science at Extreme Conditions, University of Edinburgh, David Brewster road, Joseph Black Building, Edinburgh EH9 3FJ (UK)Search for more papers by this author
First published: 11 September 2015
Citations: 25

Graphical Abstract

The maximum gas uptake of porous MOFs was explored by using gases as pressure-transmitting media in high-pressure single-crystal diffraction experiments. A study with supercritical CH4 at 3–25 kbar demonstrates that two high-pressure phase transitions are induced as the filled MOF adapts to reduce the volume of the system.

Abstract

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 2 kbar 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 3–25 kbar 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.

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