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A Low‐Symmetry Dysprosium Metallocene Single‐Molecule Magnet with a High Anisotropy Barrier
Author(s) -
Pugh Thomas,
Chilton Nicholas F.,
Layfield Richard A.
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201604346
Subject(s) - dysprosium , anisotropy , single molecule magnet , metallocene , magnet , relaxation (psychology) , crystallography , chemistry , molecule , lanthanide , ligand field theory , excited state , symmetry (geometry) , materials science , atomic physics , magnetic field , inorganic chemistry , polymerization , physics , geometry , magnetization , optics , ion , social psychology , psychology , mathematics , organic chemistry , quantum mechanics , polymer
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.