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

Benson, Oguarabau; da Silva, Ivan; Argent, Stephen P.; Cabot, Rafel; Savage, Mathew; Godfrey, Harry G.W.; Yan, Yong; Parker, Stewart F.; Manuel, Pascal; Lennox, Matthew J.; Mitra, Tamoghna; Easun, Timothy L.; Lewis, William; Blake, Alexander J.; Besley, Elena; Yang, Sihai; Schröder, Martin

Abstract

An amide-functionalized metal organic framework (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 an acylamide pyrimidyl isophthalate MOF without open metal sites and, thus, provides a unique platform to study guest binding, 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 unambiguously by inelastic neutron spectroscopy. This suggests that introduction of functional groups solely may not necessarily 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., Yan, Y., Parker, S. F., Manuel, P., Lennox, M. J., Mitra, T., Easun, T. L., Lewis, W., Blake, A. J., Besley, E., Yang, S., & 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: Other
• Online Publication Date: Nov 1, 2016
• Publication Date: Nov 16, 2016
• Deposit Date: Dec 24, 2023
• Publicly Available Date: Jan 5, 2024
• Journal: Journal of the American Chemical Society
• Print ISSN: 0002-7863
• 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/27600518
• Publisher URL: https://pubs.acs.org/doi/10.1021/jacs.6b08059