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Dalton Transactions

The international journal for inorganic, organometallic and bioinorganic chemistry



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Dalton Trans., 2009, 3403 - 3412, DOI: 10.1039/b822235e

Attempting to understand (and control) the relationship between structure and magnetism in an extended family of Mn6 single-molecule magnets

Ross Inglis, Leigh F. Jones, Constantinos J. Milios, Saiti Datta, Anna Collins, Simon Parsons, Wolfgang Wernsdorfer, Stephen Hill, Spyros P. Perlepes, Stergios Piligkos and Euan K. Brechin

The synthesis and characterisation of a large family of hexametallic [MnIII6] Single-Molecule Magnets of general formula [MnIII6O2(R-sao)6(X)2(sol)4–6] (where R = H, Me, Et; X = -O2CR (R = H, Me, Ph etc) or Hal-; sol = EtOH, MeOH and/or H2O) are presented. We show how deliberate structural distortions of the [Mn3O] trinuclear moieties within the [Mn6] complexes are used to tune their magnetic properties. These findings highlight a qualitative magneto-structural correlation whereby the type (anti- or ferromagnetic) of each Mn2 pairwise magnetic exchange is dominated by the magnitude of each individual Mn-N-O-Mn torsion angle. The observation of magneto-structural correlations on such large polymetallic complexes is rare and represents one of the largest studies of this kind.

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