场诱导的第一个 Dy(iii)中心的 12-金属冠-4 双层中缓慢的磁弛豫。
Field-induced slow magnetic relaxation in the first Dy(iii)-centered 12-metallacrown-4 double-decker.
机构信息
Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany.
Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, D-22761 Hamburg, Germany.
出版信息
Dalton Trans. 2019 Nov 7;48(41):15381-15385. doi: 10.1039/c9dt02432h. Epub 2019 Jul 5.
The reaction of Dy(OCMe)·xHO and Ga(NO)·xHO led to the isolation of (BuN)[GaDy(OH)(shi)] (1). The compound possesses a unique chemical structure enclosing the central magnetic Dy ion between diamagnetic Ga-based metallacrown 12-MC-4 ligands. The double-decker complex exhibits field-induced single-molecule magnet (SMM) behaviour with an effective energy barrier (U) of 39 K (27.1 cm). Consistent with the observed slow relaxation of magnetization, theoretical calculations suggest a ground state mainly determined by |±11/2> in the easy axis direction.
Dy(OCMe)·xHO 和 Ga(NO)·xHO 的反应导致了(BuN)[GaDy(OH)(shi)]（1）的分离。该化合物具有独特的化学结构，将中心磁性 Dy 离子包裹在非磁性 Ga 基金属冠 12-MC-4 配体之间。该双层配合物表现出场诱导的单分子磁体（SMM）行为，有效能垒（U）为 39 K（27.1 cm）。与观察到的磁化缓慢弛豫一致，理论计算表明基态主要由易轴方向上的|±11/2>决定。
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