An organic–inorganic hybrid Dy(III)-containing polyoxomolybdate based on functionalized diphosphonate ligands

A novel Dy(III)-based organodiphosphonate-functionalized polyoxomolybdate [NH2(CH3)2]3{[Dy(DMF)2(H2O)4]3[Dy(DMF)3{(Mo3O8)(O3PCOCH3PO3)}3]2}∙6DMF·2H2O (1) (DMF = N,N-Dimethylformamide) has been synthesized and characterized by elemental analysis, IR spectrum, thermogravimetric analysis (TG), UV spectroscopy, fluorescence spectroscopy and single-crystal powder X-ray diffraction (PXRD). Compound 1 is composed of two monocapped [Dy(DMF)3{(Mo3O8)(O3PCOCH3PO3)}3]6 − subunits and three [Dy(DMF)2(H2O)4]3 + coordination cations, which contain an internal capsule. The UV spectra indicate that compound 1 is stable in the pH range of 2.76–4.75.