Chen Di-Ming, Ma Xiao-Zhou, Zhang Xue-Jing, Xu Na, Cheng Peng
Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, People's Republic of China.
Inorg Chem. 2015 Mar 16;54(6):2976-82. doi: 10.1021/acs.inorgchem.5b00074. Epub 2015 Mar 2.
Two 2D layered coordination networks with formulas of {Co(TPA)Cl2.5}n (1) and {Co(TPA)(μ2-OH)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)42(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.
通过溶剂热法合成并全面表征了两种二维层状配位网络，化学式分别为{Co(TPA)Cl₂.₅}ₙ (1) 和{Co(TPA)(μ₂-OH)₂}ₙ (2)（HTPA = 4-(1,2,4-三唑-4-基)苯乙酸）。观察到了有趣的一维Co(2+)-Cl或Co(2+)-μ₂-OH链状结构。通过仔细调整反应条件，得到了一种新的三维金属有机框架（MOF），化学式为{Co₇(TPA)₆(μ₃-OH)₄(μ₂-OH)₂(H₂O)₄₂(DMF)₃(H₂O)₃}ₙ (3)。MOF 3由Co₇簇和完全去质子化的TPA配体构建而成，呈现立方pcu拓扑结构。详细研究了影响这三种基于TPA的配合物结构及其磁性能的因素。基于七核Co(II)簇的MOF 3在低温下表现出有趣的磁化动力学。
