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Reversible Dynamic Structural Transformation between 3D and 1D Cd–Co Heterometallic MOFs Showing Switchable Spin-Canted Antiferromagnetism
Crystal Growth & Design ( IF 3.8 ) Pub Date : 2020-01-16 , DOI: 10.1021/acs.cgd.9b01427
Zhong-Yi Li 1 , Xiao-Juan Li 1 , Xuan Gao 1 , Fu-Li Zhang 1 , Chi Zhang 1 , Bin Zhai 1
Affiliation  

Two Cd-Co heterometallic frameworks based on the ligand methylenesuccinate acid (H2MSA), three-dimensional (3D) [CdCo6(MSA)63-OH)2(H2O)2]·H2O (1) and one-dimensional (1D) [CdCo(MSA)2(H2O)5]·3H2O (2), were synthesized at 120 °C and room temperature, respectively. Complex 1 has a 3D structure composed of an octahedral [CdO6] node and a 2D [Co6] layer unit featuring a coedge hexagonal metal skeleton, and 2 displays a 1D chain structure with Cd2+ and Co2+ ions bridged by the MSA2– ligands. The 3D and 1D structures could transform into each other reversibly in the mother solution by controlling the temperature at room temperature and 120 °C, respectively. This phenomenon was analyzed in detail and could be well explained dynamically. Magnetic studies suggest the reversible transformation between 1 and 2 is along with switchable “on–off” spin-canted antiferromagnetism.

中文翻译:

显示可切换自旋倾斜反铁磁性的3D和1D Cd-Co异质金属MOF之间可逆的动态结构转换

基于所述配体methylenesuccinate酸(H二异金属CDCO框架2 MSA),三维(3D)[CDCO 6(MSA)6(μ 3 -OH)2(H 2 O)2 ]·H 2 O(1)和一维(1D)[CdCo(MSA)2(H 2 O)5 ]·3H 2 O(2)分别在120°C和室温下合成。复合体1具有3D结构,该结构由八面体[CdO 6 ]节点和2D [Co 6]层单元具有共边六边形金属骨架,并且2显示一维链结构,其中Cd 2+和Co 2+离子通过MSA 2-配体桥接。通过分别控制室温和120°C的温度,3D和1D结构可以在母液中可逆地相互转化。对这种现象进行了详细分析,可以很好地动态解释。磁性研究表明,在12之间可逆转换以及可切换的“开-关”自旋倾斜反铁磁性。
更新日期:2020-01-16
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