Amides Do Not Always Work: Observation of Guest Binding in an Amide-Functionalized Porous Metal–Organic Framework

Abstract

An amide-functionalised metal organic frame-work (MOF) material, MFM-136, shows a high CO2 uptake of 12.6 mmol g-1 at 20 bar and 298 K. MFM-136 is the first example of acylamide pyrimidyl isophthalate MOF without open metal sites, and thus provides a unique platform to study guest bind-ing, particularly the role of free amides. Neutron diffraction reveals that, surprisingly, there is no direct binding between the adsorbed CO2/CH4 molecules and the pendant amide group in the pore. This observation has been confirmed un-ambiguously by inelastic neutron spectroscopy. This suggests that introduction of functional groups solely may not neces-sarily induce specific guest-host binding in porous materials, but it is a combination of pore size, geometry, and functional group that leads to enhanced gas adsorption properties.

Citation

Benson, O., da Silva, I., Argent, S. P., Cabot, R., Savage, M., Godfrey, H. G., …Schröder, M. (2016). Amides Do Not Always Work: Observation of Guest Binding in an Amide-Functionalized Porous Metal–Organic Framework. Journal of the American Chemical Society, 138(45), 14828-14831. https://doi.org/10.1021/jacs.6b08059

• Journal Article Type: Article
• Acceptance Date: Aug 3, 2016
• Online Publication Date: Sep 26, 2016
• Publication Date: Nov 16, 2016
• Deposit Date: Nov 25, 2016
• Publicly Available Date: Nov 25, 2016
• Journal: Journal of the American Chemical Society
• Print ISSN: 0002-7863
• Electronic ISSN: 1520-5126
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 138
• Issue: 45
• Pages: 14828-14831
• DOI: https://doi.org/10.1021/jacs.6b08059
• Public URL: https://nottingham-repository.worktribe.com/output/828190
• Publisher URL: http://pubs.acs.org/doi/abs/10.1021/jacs.6b08059