Six-Coordinate Ln(III) Complexes with Various Coordination Geometries Showing Distinct Magnetic Properties
Six-Coordinate Ln(III) Complexes with Various Coordination Geometries Showing Distinct Magnetic Properties
复制标题
具有不同配位几何形状的六配位 Ln(III) 配合物表现出独特的磁性
DOI：
10.3390/inorganics6010016
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发表时间：
2018-03-01
期刊：
影响因子：
2.9
通讯作者：
Tang, Jinkui
中科院分区：
文献类型：
--
作者：
Guo, Mei;Tang, Jinkui
三种结构式为[Ln(L-1)(3)]的稀土配合物的合成、结构表征和磁性能（Ln = Dy (1Dy); Er (1Er)）；报告了[Dy(L-2)(2)](2Dy)。配合物 1Dy 和 1Er 与金属离子具有扭曲的三棱柱配位几何结构，但由于 Dy-III（扁形）和 Er-III（长形）离子的电子密度形状不同而表现出不同的磁性。复合1Dy在零直流(dc)场下表现出明显的SMM行为，有效能垒为31.4 K，而复合1Er仅在400 Oe外场下具有SMM行为，有效能垒为23.96 K。形成鲜明对比的是，具有八面体几何形状的复合2Dy仅表现出交流(ac)磁化率信号的频率依赖性，在零直流场下没有X''峰。
The syntheses, structural characterization, and magnetic properties of three lanthanide complexes with formulas [Ln(L-1)(3)] (Ln = Dy (1Dy); Er (1Er)); and [Dy(L-2)(2)] (2Dy) were reported. Complexes 1Dy and 1Er are isostructural with the metal ion in distorted trigonal-prismatic coordination geometry, but exhibit distinct magnetic properties due to the different shapes of electron density for Dy-III (oblate) and Er-III (prolate) ions. Complex 1Dy shows obvious SMM behavior under a zero direct current (dc) field with an effective energy barrier of 31.4 K, while complex 1Er only features SMM behavior under a 400 Oe external field with an effective energy barrier of 23.96 K. In stark contrast, complex 2Dy with the octahedral geometry only exhibits the frequency dependence of alternating current (ac) susceptibility signals without X '' peaks under a zero dc field.