5 years ago

Binding CO2 by a Cr8 Metallacrown

Binding CO2 by a Cr8 Metallacrown
Harry G. W. Godfrey, Martyn S. Brown, Lee Brammer, Daniel Florin Sava, Mathew Savage, Sihai Yang, Martin P. Attfield, Grigore A. Timco, Flor Siperstein, Richard E. P. Winpenny, Martin Schröder, Joseph J. W. McDouall, Iñigo J. Vitórica-Yrezábal, Florian Moreau
The {Cr8} metallacrown [CrF(O2CtBu)2]8, containing a F-lined internal cavity, shows high selectivity for CO2 over N2. DFT calculations and absorption studies support the multiple binding of F-groups to the C-center of CO2 (C⋅⋅⋅F 3.190(9)–3.389(9) Å), as confirmed by single-crystal X-ray diffraction. Green metallacrown for green applications: A Cr8 ring is shown to bind CO2 strongly and selectively through C⋅⋅⋅F interactions. Cr green, F yellow, O red, C gray.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201701726

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