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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.

SUBMITTER: Hasell T

PROVIDER: S-EPMC5101576 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature

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Porous Organic Cages for Sulfur Hexafluoride Separation.

Hasell Tom T Miklitz Marcin M Stephenson Andrew A Little Marc A MA Chong Samantha Y SY Clowes Rob R Chen Linjiang L Holden Daniel D Tribello Gareth A GA Jelfs Kim E KE Cooper Andrew I AI

Journal of the American Chemical Society 20160127 5

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 elu ...[more]

PMID: 26757885

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