[Cr(III)8M(II)6](12+) Coordination Cubes (M(II)=Cu, Co)

Sergio Sanz; Helen M O'Connor; Eufemio Moreno Pineda; Kasper S Pedersen; Gary S Nichol; Ole Mønsted; Høgni Weihe; Stergios Piligkos; Eric J L McInnes; Paul J Lusby; Euan K Brechin

doi:10.1002/anie.201501041

[Cr(III)8M(II)6](12+) Coordination Cubes (M(II)=Cu, Co)

Angew Chem Int Ed Engl. 2015 Jun 1;54(23):6761-4. doi: 10.1002/anie.201501041. Epub 2015 Apr 17.

Authors

Affiliations

¹ EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ (UK).
² School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL (UK).
³ Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen (Denmark).
⁴ Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen (Denmark). piligkos@kiku.dk.
⁵ School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL (UK). eric.mcinnes@manchester.ac.uk.
⁶ EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ (UK). Paul.Lusby@ed.ac.uk.
⁷ EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ (UK). E.Brechin@ed.ac.uk.

Abstract

[Cr(III)8M(II)6](12+) (M(II) =Cu, Co) coordination cubes were constructed from a simple [Cr(III) L3 ] metalloligand and a "naked" M(II) salt. The flexibility in the design proffers the potential to tune the physical properties, as all the constituent parts of the cage can be changed without structural alteration. Computational techniques (known in theoretical nuclear physics as statistical spectroscopy) in tandem with EPR spectroscopy are used to interpret the magnetic behavior.

Keywords: EPR spectroscopy; heterometallic cages; magnetometry; molecular magnetism; transition metals.