title: Switching Kr/Xe selectivity with temperature in a metal-organic framework.
abstract: Krypton (Kr) and xenon (Xe) adsorption on two partially fluorinated metal-organic frameworks (FMOFCu and FMOFZn) with different cavity size and topologies are reported. FMOFCu shows an inversion in sorption selectivity toward Kr at temperatures below 0 °C while FMOFZn does not. The 1D microtubes packed along the (101) direction connected through small bottleneck windows in FMOFCu appear to be the reason for this peculiar behavior. The FMOFCu shows an estimated Kr/Xe selectivity of 36 at 0.1 bar and 203 K.
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States.
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Fernandez
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.forename: Praveen K
authors.initials: PK
authors.lastname: Thallapally
authors.forename: Denis M
authors.initials: DM
authors.lastname: Strachan
mesh_terms: D007726:Krypton / Q000737:chemistry*; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry*; D013696:Temperature; D014978:Xenon / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D014978:Xenon; D007726:Krypton