Hasell Tom, Miklitz Marcin, Stephenson Andrew, Little Marc A, Chong Samantha Y, Clowes Rob, Chen Linjiang, Holden Daniel, Tribello Gareth A, Jelfs Kim E, Cooper Andrew I
Department of Chemistry and Centre for Materials Discovery, University of Liverpool , Crown St., Liverpool L69 7ZD, United Kingdom.
Department of Chemistry, Imperial College London , South Kensington, London SW7 2AZ, United Kingdom.
J Am Chem Soc. 2016 Feb 10;138(5):1653-9. doi: 10.1021/jacs.5b11797. Epub 2016 Jan 27.
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.
研究了一系列多孔有机笼对六氟化硫（SF6）相对于氮气的选择性吸附。尽管缺乏任何金属位点，但一种多孔笼CC3在室温和压力下表现出任何材料所报道的最高的SF6/N2选择性，这在气体突破柱中实现了实际分离。这些材料对SF6的吸收远高于静态孔结构所预期的。通过X射线晶体学阐明了SF6在这些材料中的位置，结果表明这些分子晶体中的协同扩散和结构重排可以解释它们优异的SF6/N2选择性。
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