Highly selective CO2vs. N2 adsorption in the cavity of a molecular coordination cage

Two M8L12 cubic coordination cages, as desolvated crystalline powders, preferentially adsorb CO2 over N2 with ideal selectivity CO2/N2 constants of 49 and 30 at 298 K. A binding site for CO2 is suggested by crystallographic location of CS2 within the cage cavity at an electropositive hydrogen-bond d...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2017, Vol.53 (31), p.4398-4401
Main Authors: Wright, James S, Metherell, Alexander J, Cullen, William M, Piper, Jerico R, Dawson, Robert, Ward, Michael D
Format: Article
Language:English
Subjects:
Binding sites
Cage
Carbon dioxide
Crystal structure
Holes
Hydrogen bonds
Porosity
Selectivity
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Summary:Two M8L12 cubic coordination cages, as desolvated crystalline powders, preferentially adsorb CO2 over N2 with ideal selectivity CO2/N2 constants of 49 and 30 at 298 K. A binding site for CO2 is suggested by crystallographic location of CS2 within the cage cavity at an electropositive hydrogen-bond donor site, potentially explaining the high CO2/N2 selectivity compared to other materials with this level of porosity.
ISSN:1359-7345
1364-548X
DOI:10.1039/c7cc01959a