Two novel oxovanadium-organophosphonate hybrids with a 3D supramolecular structure: synthesis, crystal structures, surface photovoltage and luminescent properties

Two novel organic-inorganic hybrid materials of oxovanadium-organophosphonate with a 3D supramolecular structure, [{M(1,10-phen)}(VO)(OH)(hedp)]center dot H2O (M = Cu (1), Zn (2); hedpH(4) = 1-h ydroxyethylidenediphosphonate, 1,10-phen = 1,10-phenanthroline), have been synthesized under hydrothermal conditions. Compounds 1 and 2 are isomorphous and adopt a three-dimensional supramolecular network structure. The interconnection of {(VO4)(OH)}, {MN2O3} and {CPO3} polyhedra leads to a 2D layer through corner-sharing, and such layers are further assembled into a 3D supramolecular structure by pi-pi stacking interactions. Surface photovoltage and luminescent properties of the two compounds have also been studied.