A new inorganic–organic hybrid polyoxometalate constructed by [PMo8V6O42] clusters and transition metal complexes

A new compound [Zn(phen)2]2[ ][Zn(phen)2(H2O)]2[ ]  · 7H2O (phen  = phenanthroline) has been synthesized under hydrothermal conditions and characterized by IR, TG analysis and single-crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic system, space group P21/C, a  = 21.609(4) A, b  = 16.537(3) A, c  = 21.279(4) A, α  = 90°, β  = 100.25(3)°, γ  = 90°, V  = 7483(3) A3, Z  = 2. The basic building unit in 1 is the [PMo8V6O42] cluster. The most remarkable structural feature of 1 is that there exist two distinct [PMo8V6O42] clusters. One is covalently linked by [Zn(phen)2] complexes to form a 2D covalent layer, the other supports two [Zn(phen)2(H2O)] complexes forming a discrete bisupporting structure. It is interesting that discrete bisupporting clusters locate in the space of two adjacent covalently layers to form a 3D supramolecular framework.