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 GW, Yang, Yong, Parker, Stewart F, Manuel, Pascal, Lennox, Matthew J
et al (show 7 more authors) (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). pp. 14828-14831.

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Abstract

An amide-functionalized metal organic framework (MOF) material, MFM-136, shows a high CO<sub>2</sub> uptake of 12.6 mmol g<sup>-1</sup> 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 CO<sub>2</sub>/CH<sub>4</sub> 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.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 02 Oct 2018 13:40
Last Modified: 19 Jan 2023 01:15
DOI: 10.1021/jacs.6b08059
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3026957