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Carbon Dioxide Fixation and Sulfate Sequestration by a Supramolecular Trigonal Bipyramid

DOI: 10.1002/anie.201504856 DOI Help

Authors: Colm Browne (University of Cambridge) , William Ramsay (University of Cambridge) , Tanya Ronson (University of Cambridge) , John Medley-hallam (University of Cambridge) , Jonathan R. Nitschke (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Angewandte Chemie International Edition , VOL 54 , PAGES 11122 - 11127

State: Published (Approved)
Published: September 2015

Abstract: The subcomponent self-assembly of a bent dialdehyde ligand and different cationic and anionic templates led to the formation of two new metallosupramolecular architectures: a Fe(II) 4 L6 molecular rectangle was isolated following reaction of the ligand with iron(II) tetrafluoroborate, and a M5 L6 trigonal bipyramidal structure was constructed from either zinc(II) tetrafluoroborate or cadmium(II) trifluoromethanesulfonate. The spatially constrained arrangement of the three equatorial metal ions in the M5 L6 structures was found to induce small-molecule transformations. Atmospheric carbon dioxide was fixed as carbonate and bound to the equatorial metal centers in both the Zn5 L6 and Cd5 L6 assemblies, and sulfur dioxide was hydrated and bound as the sulfite dianion in the Zn5 L6 structure. Subsequent in situ oxidation of the sulfite dianion resulted in a sulfate dianion bound within the supramolecular pocket.

Journal Keywords: carbon dioxide fixation; host–guest systems; small-molecule transformations; supramolecular chemistry; template synthesis

Subject Areas: Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction

Added On: 14/03/2016 13:22

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