Magnetic and HFEPR Studies of Exchange Coupling in a Series of μ-Cl Dicobalt Complexes.
Magnetic and HFEPR Studies of Exchange Coupling in a Series of μ-Cl Dicobalt Complexes.
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DOI：
10.1021/acs.inorgchem.6b02368
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发表时间：
2017-02
影响因子：
4.6
通讯作者：
Jia-jia Liu;Shangda Jiang;P. Neugebauer;J. van Slageren;Yanhua Lan;W. Wernsdorfer;Bingwu Wang;
中科院分区：
文献类型：
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作者：
Jia-jia Liu;Shangda Jiang;P. Neugebauer;J. van Slageren;Yanhua Lan;W. Wernsdorfer;Bingwu Wang;
我们报告了三个双核钴（II）配合物，[Co（L）Cl 2]2（L = bpy，mbpy，和dmpbt），这是完全由氯离子桥接。高场电子顺磁共振和磁测量被用来研究分子内的磁性Co-Co相互作用。基于多自旋模型的模拟结果表明，复合物是弱铁磁耦合和各向同性交换耦合常数略有不同的三个复合物。此外，零场分裂和磁耦合的竞争效应的温度依赖的磁化率进行了分析。
We report three dinuclear cobalt(II) complexes, [Co(L)Cl2]2 (L = bpy, mbpy, and dmpbt), that are bridged solely by chloride ions. High-field electron paramagnetic resonance and magnetometric measurements were applied to investigate the magnetic intramolecular Co-Co interactions. Simulation results based on the multispin model reveal that the complexes are weakly ferromagnetically coupled and that the isotropic exchange coupling constants differ slightly for the three complexes. Moreover, the competing effects of zero-field splitting and magnetic coupling on the temperature-dependent magnetic susceptibility were analyzed.