Publication | Open Access
On Approaching the Limit of Molecular Magnetic Anisotropy: A Near‐Perfect Pentagonal Bipyramidal Dysprosium(III) Single‐Molecule Magnet
903
Citations
20
References
2016
Year
We report a monometallic dysprosium complex, [Dy(O<sup>t</sup> Bu)<sub>2</sub> (py)<sub>5</sub> ][BPh<sub>4</sub> ] (5), that shows the largest effective energy barrier to magnetic relaxation of U<sub>eff</sub> =1815(1) K. The massive magnetic anisotropy is due to bis-trans-disposed tert-butoxide ligands with weak equatorial pyridine donors, approaching proposed schemes for high-temperature single-molecule magnets (SMMs). The blocking temperature, T<sub>B</sub> , is 14 K, defined by zero-field-cooled magnetization experiments, and is the largest for any monometallic complex and equal with the current record for [Tb<sub>2</sub> N<sub>2</sub> {N(SiMe<sub>3</sub> )<sub>2</sub> }<sub>4</sub> (THF)<sub>2</sub> ].
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