Planar {Ni₆} Cluster-Containing Polyoxometalate-based Inorganic–Organic Hybrid Compound and Its Extended Structure

Two {Ni6} cluster-containing inorganic–organic hybrid compounds have been successfully synthesized in the presence of organic amine under hydrothermal conditions, and they were characterized by powder and single-crystal X-ray diffraction, elemental analysis, thermogravimetric analysis, and IR spectroscopy. Structural analysis indicates that [Ni0.5(H2O)3]­[{Ni6(μ3-OH)3­en­(H2O)10}­(H2P2W15O56)]·10H2O (1, en = ethylenediamine) is a triangular inorganic {Ni6} cluster substituted polyoxotungstate with only one en to stabilize the {Ni6} cluster. However, [Ni­(dap)2]­{[Ni1.5(dap)1.5­(H2O)3]­[Ni6(μ3-OH)3­(dap)2(en)­(H2O) ​{O2C­(CH2)2CO2}0.5­(CH3COO)­(P2W15O56)]}·​15H2O (2, dap = 1,2-diaminopropane) is a three-dimensional inorganic–organic hybrid compound linked by succinic acid. The magnetic properties of both compounds were studied. In addition, the adsorption properties of compound 2 have also been investigated.本研究在有机胺存在的水热条件下，成功合成了两例含{Ni6}团簇的无机-有机杂化化合物，并通过粉末X射线衍射、单晶X射线衍射、元素分析、热重分析及红外光谱对其进行了表征。结构分析表明，化合物1：[Ni₀.₅(H₂O)₃]·[{Ni₆(μ₃-OH)₃·en·(H₂O)₁₀}(H₂P₂W₁₅O₅₆)]·10H₂O（en = 乙二胺（ethylenediamine）），是一例仅通过一个乙二胺配体稳定{Ni6}团簇的三角形{Ni6}团簇取代型多钨酸盐。而化合物2：[Ni(dap)₂]·{[Ni₁.₅(dap)₁.₅(H₂O)₃][Ni₆(μ₃-OH)₃·(dap)₂(en)·(H₂O)·{O₂C(CH₂)₂CO₂}₀.₅(CH₃COO)(P₂W₁₅O₅₆)]}·15H₂O（dap = 1,2-丙二胺（1,2-diaminopropane）），则是一例由丁二酸桥连的三维无机-有机杂化化合物。本研究对两种化合物的磁学性能进行了研究；此外，还对化合物2的吸附性能展开了探究。