Controlling Gas Selectivity in Molecular Porous Liquids by Tuning the Cage Window Size

Benjamin D Egleston; Konstantin V Luzyanin; Michael C Brand; Rob Clowes; Michael E Briggs; Rebecca L Greenaway; Andrew I Cooper

doi:10.1002/anie.201914037

Controlling Gas Selectivity in Molecular Porous Liquids by Tuning the Cage Window Size

Angew Chem Int Ed Engl. 2020 May 4;59(19):7362-7366. doi: 10.1002/anie.201914037. Epub 2020 Mar 12.

Authors

Benjamin D Egleston¹, Konstantin V Luzyanin², Michael C Brand¹, Rob Clowes¹, Michael E Briggs¹, Rebecca L Greenaway², Andrew I Cooper¹

Affiliations

¹ Department of Chemistry and Materials Innovation Factory, University of Liverpool, Oxford Street, Liverpool, L7 3NY, UK.
² Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.

PMID: 31999036
DOI: 10.1002/anie.201914037

Abstract

Control of pore window size is the standard approach for tuning gas selectivity in porous solids. Here, we present the first example where this is translated into a molecular porous liquid formed from organic cage molecules. Reduction of the cage window size by chemical synthesis switches the selectivity from Xe-selective to CH₄ -selective, which is understood using ¹²⁹ Xe, ¹ H, and pulsed-field gradient NMR spectroscopy.

Keywords: NMR; adsorption selectivity; host-guest system; porous liquids; porous organic cages.

Abstract

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