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Unravelling exceptional acetylene and carbon dioxide adsorption within a tetra-amide functionalized metal-organic framework

Moreau, Florian, da Silva, Ivan, Al Smail, Nada H., Easun, Timothy L., Savage, Mathew, Godfrey, Harry G. W., Parker, Stewart F., Manuel, Pascal, Yang, Sihai and Schröder, Martin 2017. Unravelling exceptional acetylene and carbon dioxide adsorption within a tetra-amide functionalized metal-organic framework. Nature Communications 8 , 14085. 10.1038/ncomms14085

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Abstract

Understanding the mechanism of gas-sorbent interactions is of fundamental importance for the design of improved gas storage materials. Here we report the binding domains of carbon dioxide and acetylene in a tetra-amide functionalized metal-organic framework, MFM-188, at crystallographic resolution. Although exhibiting moderate porosity, desolvated MFM-188a exhibits exceptionally high carbon dioxide and acetylene adsorption uptakes with the latter (232 cm3 g−1 at 295 K and 1 bar) being the highest value observed for porous solids under these conditions to the best of our knowledge. Neutron diffraction and inelastic neutron scattering studies enable the direct observation of the role of amide groups in substrate binding, representing an example of probing gas-amide binding interactions by such experiments. This study reveals that the combination of polyamide groups, open metal sites, appropriate pore geometry and cooperative binding between guest molecules is responsible for the high uptakes of acetylene and carbon dioxide in MFM-188a.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: Nature Research
ISSN: 2041-1723
Funders: EPSRC and ERC
Date of First Compliant Deposit: 10 February 2017
Date of Acceptance: 28 November 2016
Last Modified: 10 Sep 2020 15:15
URI: http://orca.cf.ac.uk/id/eprint/98234

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