Hydrothermal synthesis and crystal structure of a layered vanadium phosphate with a directly coordinated organonitrogen ligand: [V4O7(HPO4)2(2,2′-bipy)2]

A layered vanadium phosphate [V4O7(HPO4)2(2,2′-bipy)2] was synthesized and characterized (elemental analysis, IR and thermal analysis) by the hydrothermal reaction of NaVO3·2H2O, ZnO, H3PO4, 2,2′-bipy and water. The compound [V4O7(HPO4)2(2,2′-bipy)2] exhibits a unique 4,6,8-net structure with organonitrogen donors of 2,2′-bipy ligands coordinated directly to the vanadium phosphate framework.