Hydrothermal synthesis of two Anderson POM-supported transition metal organic–inorganic compounds

Two isostructural compounds based on Anderson polyoxoanions, [Cu(phen)]2[CrMo6H5O24] (1) and [Cu(phen)]2[AlMo6H5O24] (2) (phen = 1,10-phenaanthroline), have been hydrothermally synthesized and characterized by IR, XPS, EPR spectra, TG analyses, magnetic susceptibility, and single-crystal X-ray diffraction. Compounds crystallize in the monoclinic space group P2(1)/n with a = 5.66710(10) Å, b = 21.3723(5) Å, c = 14.7092(3) Å, β = 98.10(10)°, V = 1763.79(6) Å3, R1 = 0.0240, Z = 2 and GOF = 1.140 for 1, and in the monoclinic space group P2(1)/n with a = 5.6641(3) Å, b = 21.3346(13) Å, c = 14.6909(9) Å, β = 97.9120(10)°, V = 1758.37(18) Å3, R1 = 0.0529, Z = 2 and GOF = 0.0994 for 2. Single crystal X-ray diffraction reveals that the compounds 1 and 2 are both built up of Anderson polyoxoanions and copper–phen complexes. The structural feature of 1 and 2 is that the Anderson polyoxoanions act as multidentate ligands linking copper–phen complex to form 1D chains. Compounds 1 and 2 not only represent new Anderson-type POM-supported transition metal organic–inorganic hybrid compounds with extend structure, but also verify the feasibility of constructing these compounds through hydrothermal methods.