Low dimensional and frustrated antiferromagnetic interactions in transition metal chloride complexes with simple amine ligands

Low dimensional and frustrated antiferromagnetic interactions in transition metal chloride complexes with simple amine ligands
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过渡金属氯化物与简单胺配体配合物中的低维和受阻反铁磁相互作用

DOI:
10.1039/c8ce01901k
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发表时间:
2019
期刊:
影响因子:
3.1
通讯作者:
Chalmers J
Chalmers J
中科院分区:
化学3区
文献类型:
--
作者:
Chalmers J

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本文报道了五个新的锰、钴和铜的氯和简单胺配合物的合成、晶体结构和磁性。四个肼络合物是离散的性质,而O-甲基羟胺相含有由氯配体桥接的共享边链。这些材料的磁性的研究表明,这些材料中的两个,Co(NH3 NH 2)2(H2O)2Cl 4和Cu(NH 2 OCH 3)2Cl 2,表现出有趣的反铁磁性质所产生的低维结构。Co(NH_3NH_2)_2(H_2O)_2Cl_4表现出明显的二维磁阻挫效应,而Cu(NH_2OCH_3)_2Cl_2的磁阻挫系数则符合一维链模型.还讨论了在这些材料中观察到的磁耦合强度与其可能的交换途径之间的关系。
This study reports the facile synthesis, crystal structures and magnetic properties of five new Mn, Co and Cu complexes with chloride and simple amine ligands. The four hydrazinium complexes are discrete in nature while the O-methylhydroxylamine phase contains edge-sharing chains bridged by chloride ligands. Investigation of the magnetic properties of these materials reveals that two of these materials, Co(NH3NH2)2(H2O)2Cl4 and Cu(NH2OCH3)2Cl2, exhibit interesting antiferromagnetic properties arising from their low dimensional structures. Co(NH3NH2)2(H2O)2Cl4 appears to exhibit significant 2D magnetic frustration while the magnetic susceptibilities of Cu(NH2OCH3)2Cl2 are well fitted by a one-dimensional chain model. The relationships between the strength of the magnetic coupling observed in these materials and their likely exchange pathways are also discussed.
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