title: Porous Organic Cages for Sulfur Hexafluoride Separation.
abstract: A series of porous organic cages is examined for the selective adsorption of sulfur hexafluoride (SF6) over nitrogen. Despite lacking any metal sites, a porous cage, CC3, shows the highest SF6/N2 selectivity reported for any material at ambient temperature and pressure, which translates to real separations in a gas breakthrough column. The SF6 uptake of these materials is considerably higher than would be expected from the static pore structures. The location of SF6 within these materials is elucidated by X-ray crystallography, and it is shown that cooperative diffusion and structural rearrangements in these molecular crystals can rationalize their superior SF6/N2 selectivity.
authors.affiliation: Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
authors.forename: Tom
authors.initials: T
authors.lastname: Hasell
authors.affiliation: Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, United Kingdom.
authors.forename: Marcin
authors.initials: M
authors.lastname: Miklitz
authors.affiliation: Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
authors.forename: Andrew
authors.initials: A
authors.lastname: Stephenson
authors.affiliation: Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
authors.forename: Marc A
authors.initials: MA
authors.lastname: Little
authors.affiliation: Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
authors.forename: Samantha Y
authors.initials: SY
authors.lastname: Chong
authors.affiliation: Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
authors.forename: Rob
authors.initials: R
authors.lastname: Clowes
authors.affiliation: Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
authors.forename: Linjiang
authors.initials: L
authors.lastname: Chen
authors.affiliation: Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
authors.forename: Daniel
authors.initials: D
authors.lastname: Holden
authors.affiliation: Atomistic Simulation Centre, Department of Physics and Astronomy, Queen's University Belfast , University Road, Belfast BT7 1NN, United Kingdom.
authors.forename: Gareth A
authors.initials: GA
authors.lastname: Tribello
authors.affiliation: Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, United Kingdom.
authors.forename: Kim E
authors.initials: KE
authors.lastname: Jelfs
authors.affiliation: Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
authors.forename: Andrew I
authors.initials: AI
authors.lastname: Cooper