A Low‐Symmetry Dysprosium Metallocene Single‐Molecule Magnet with a High Anisotropy Barrier
2016; Wiley; Volume: 55; Issue: 37 Linguagem: Inglês
10.1002/anie.201604346
ISSN1521-3773
AutoresThomas Pugh, Nicholas F. Chilton, Richard A. Layfield,
Tópico(s)Porphyrin and Phthalocyanine Chemistry
ResumoAbstract The single‐molecule magnet (SMM) properties of the isocarbonyl‐ligated dysprosium metallocene [Cp* 2 Dy{μ‐(OC) 2 FeCp}] 2 ( 1 Dy ), which contains a rhombus‐shaped Dy 2 Fe 2 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 1 Dy 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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