On Approaching the Limit of Molecular Magnetic Anisotropy: A Near‐Perfect Pentagonal Bipyramidal Dysprosium(III) Single‐Molecule Magnet

作者：You‐Song Ding, Nicholas F. Chilton, Richard E. P. Winpenny, Yan‐Zhen Zheng · 发表于：Angewandte Chemie International Edition · 年份：2016 · DOI：10.1002/anie.201609685 · 被引用次数：925 · 研究领域：Magnetism in coordination complexes、Lanthanide and Transition Metal Complexes、Advanced NMR Techniques and Applications

Abstract We report a monometallic dysprosium complex, [Dy(OtBu)2(py)5][BPh4] (5), that shows the largest effective energy barrier to magnetic relaxation of Ueff=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, TB , 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 [Tb2N2{N(SiMe3)2}4(THF)2].