A Family of CoIICoIII3 Single-IonMagnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrierby Remote Substituent and Counter Cation
A Family of CoIICoIII3 Single-IonMagnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrierby Remote Substituent and Counter Cation
复制标题
具有零场慢磁弛豫的 CoIICoIII3 单离子磁体家族：通过远程取代基和抗衡阳离子微调能垒
DOI：
10.1021/acs.inorgchem.5b00526
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发表时间：
2015
影响因子：
4.6
通讯作者：
Gao Song
中科院分区：
文献类型：
--
作者：
Zhu Yuan-Yuan;Zhang Yi-Quan;Yin Ting-Ting;Gao Chen;Wang Bing-Wu;Gao Song
研究了一类空气稳定的星型CoIICoIII3配合物的合成、结构和磁性.这些配合物只含有一个顺磁性Co（II）离子与appromateD3的协调环境中的中心和三个抗磁性Co（III）离子在外围。磁性研究表明，在没有外加直流场的情况下，它们的磁弛豫缓慢，这是单分子磁体（SMM）的特征行为，由中心具有近似D3对称性的单个Co（II）离子引起。最重要的是，它表明，各向异性能垒可以微调的配体和抗衡阳离子的外围取代基。从38 K到147 K，各向异性能垒显著增加.
The synthesis, structures, and magnetic properties of a family of air-stable star-shaped CoIICoIII3complexes were investigated. These complexes contain only one paramagnetic Co(II) ion with the approximateD3coordination environment in the center and three diamagnetic Co(III) ions in the peripheral. Magnetic studies show their slow magnetic relaxation in the absence of an applied dc field, which is characteristic behavior of single-molecule magnets (SMMs), caused by the individual Co(II) ion with approximateD3symmetry in the center. Most importantly, it was demonstrated that the anisotropy energy barrier can be finely tuned by the periphery substituent of the ligand and the countercation. The anisotropy energy barrier can be increased significantly from 38 K to 147 K.