A Low-Symmetry Dysprosium Metallocene Single-Molecule Magnet with a High Anisotropy Barrier
Dr. Thomas Pugh
School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL U.K.
Search for more papers by this authorDr. Nicholas F. Chilton
School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL U.K.
Search for more papers by this authorCorresponding Author
Prof. Dr. Richard A. Layfield
School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL U.K.
Search for more papers by this authorDr. Thomas Pugh
School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL U.K.
Search for more papers by this authorDr. Nicholas F. Chilton
School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL U.K.
Search for more papers by this authorCorresponding Author
Prof. Dr. Richard A. Layfield
School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL U.K.
Search for more papers by this authorAbstract
The single-molecule magnet (SMM) properties of the isocarbonyl-ligated dysprosium metallocene [Cp*2Dy{μ-(OC)2FeCp}]2 (1Dy), which contains a rhombus-shaped Dy2Fe2 core, are described. Combining a strong axial [Cp*]− ligand field with a weak equatorial field consisting of the isocarbonyl ligands leads to an anisotropy barrier of 662 cm−1 in zero applied field. The dominant thermal relaxation pathways in 1Dy involves at least the fourth-excited Kramers doublet, thus demonstrating that prominent SMM behavior can be observed for dysprosium in low-symmetry environments.
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