Unravelling Exceptional Acetylene and Carbon Dioxide Adsorption within a Tetra-amide Functionalized Metal-Organic Framework

Florian Moreau, Ivan Da Silva, Nada H. Al Smail, Mathew Savage, Harry Godfrey, Stewart F. Parker, Pascal Manuel, Sihai Yang, Martin Schroder

    Research output: Contribution to journalArticlepeer-review

    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.
    Original languageEnglish
    Article number14085
    JournalNature Communications
    Early online date8 Feb 2017
    DOIs
    Publication statusPublished - 2017

    Keywords

    • metal-organic framework, amide, acetylene, carbon dioxide, neutron powder diffraction, inelastic neutron scattering

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