Switching a 2D Co(II) layer to a 3D Co7-cluster-based metal-organic framework: syntheses, crystal structures, and magnetic properties.
Switching a 2D Co(II) layer to a 3D Co7-cluster-based metal-organic framework: syntheses, crystal structures, and magnetic properties.
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DOI：
10.1021/acs.inorgchem.5b00074
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发表时间：
2015-03
影响因子：
4.6
通讯作者：
Di-Ming Chen;Xiao‐zhou Ma;Xuejing Zhang;N. Xu;P. Cheng
中科院分区：
文献类型：
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作者：
Di-Ming Chen;Xiao‐zhou Ma;Xuejing Zhang;N. Xu;P. Cheng
采用溶剂热法合成了两个二维层状配位网络，分子式分别为{[Co（TPA）Cl]（H2O）2. 5}n（1）和{[Co（TPA）（μ2-OH）]（H2O）2}n（2）（HTPA = 4-（1，2，4-三唑-4-基）苯乙酸），并对其进行了表征.观察到有趣的一维Co（2+）-Cl或Co（2+）-μ2-OH链结构。通过调整反应条件，得到了一种新的三维金属有机骨架（MOF），分子式为{[Co 7（TPA）6（μ3-OH）4（μ2-OH）2（H2O）4]（TPA）2（DMF）3（H2O）3}n（3）。M0 F 3由Co 7簇和完全去质子化的TPA配体构建，其显示出立方PCU拓扑结构。详细研究了影响三种TPA基配合物结构的因素，以及它们的磁性。基于七核Co（II）团簇的MOF 3在低温下显示出有趣的磁化动力学。
Two 2D layered coordination networks with formulas of {[Co(TPA)Cl](H2O)2.5}n (1) and {[Co(TPA)(μ2-OH)](H2O)2}n (2) (HTPA = 4-(1,2,4-triazol-4-yl)phenylacetic acid) were solvothermally synthesized and fully characterized. Interesting 1D Co(2+)-Cl or Co(2+)-μ2-OH chain structures were observed. By carefully adjusting the reaction conditions, a new 3D metal-organic framework (MOF) with a formula of {[Co7(TPA)6(μ3-OH)4(μ2-OH)2(H2O)4](TPA)2(DMF)3(H2O)3}n (3) was obtained. MOF 3 is built from Co7 clusters and fully deprotonated TPA ligands, which display a cubic pcu topology. Factors that influence the structures of the three TPA-based complexes, as well as their magnetic properties, were investigated in detail. The heptanuclear-Co(II)-cluster-based MOF 3 shows interesting magnetization dynamics at low temperature.