Polar Ferromagnetic Metal by Intercalation of Metal–Amine Complexes
Polar Ferromagnetic Metal by Intercalation of Metal–Amine Complexes
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DOI：
10.1021/acs.chemmater.1c00540
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发表时间：
2021-07
影响因子：
8.6
通讯作者：
Huafei Zheng;B. Wilfong;D. Hickox-Young;J. Rondinelli;P. Zavalij;E. Rodriguez
中科院分区：
文献类型：
--
作者：
Huafei Zheng;B. Wilfong;D. Hickox-Young;J. Rondinelli;P. Zavalij;E. Rodriguez
金属-胺络合物Co（en）3（其中en =乙二胺）插入硫化钴（CoS）层之间以形成极性铁磁金属。用X射线单晶衍射方法测定了Pca_（21）族杂化化合物[Co（en）_3]（CoS）_（12）·en的晶体结构，晶胞参数a = 14.778（3）B= 11.066（3），c = 20.095（5）. [Co（en）3]2+配合物在CoS层之间有序排列，打破了它们固有的四重对称性。此外，手性Co（en）3与层的末端硫键形成氢键并破坏反转对称性，从而诱导极性状态。氨基的最短氢键为H···S = 2.41（1）π。标题化合物在1.8 ~ 300 K范围内表现出金属电阻率，在43 K处出现反常现象.通过磁化强度测量，发现Co（en）3在43 K以下呈现自发铁磁有序.第一性原理计算再现的铁磁结构，并说明之间的解耦的导电电子和反转提升失真。我们的工作表明，由功能性2D主体的插层化学产生的混合材料提供了一种统一禁忌性质的途径。
The metal–amine complex Co(en)3, where en = ethylenediamine, intercalates between layers of cobalt sulfide (CoS) to form a polar, ferromagnetic metal. We solve the structure of the hybrid compound [Co(en)3](CoS)12·en in the polar groupPca21with lattice parametersa= 14.778(3) Å,b= 11.066(3) Å, andc= 20.095(5) Å using single-crystal X-ray diffraction. The [Co(en)3]2+complexes order between CoS layers and break their inherent fourfold symmetry. Moreover, the chiral Co(en)3complexes hydrogen bond to the terminal sulfides of the layers and break inversion symmetry, thereby inducing a polar state. The shortest hydrogen bond of the amino group is H···S = 2.41(1) Å. From 1.8 to 300 K, the title compound displays metallic electrical resistivity and an anomaly at 43 K. Through magnetization measurements, we find that Co(en)3exhibits spontaneous ferromagnetic order below 43 K. First-principles calculations reproduce the ferromagnetic structure and illustrate decoupling between the conducting electrons and the inversion-lifting distortion. Our work shows that hybrid materials created from intercalation chemistry of functional 2D hosts provides a pathway for uniting contraindicated properties.