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 [Ni_0.5(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]­{[Ni_1.5(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.