Hydrothermal Synthesis and Characterization of a New Strandberg-type Diphosphopentamolybdate (C6N3H18)2[P2Mo5O23] · 6H2O

An inorganic-organic hybrid material formulated as (C6N3H18)2[P2Mo5O23] · 6H2O, has been hydrothermally synthesized and characterized by single crystal X-ray diffraction technique, IR spectrum, thermogravimetric analysis and UV-visible spectroscopy. The structure consists of diphosphopentamolybdate Strandberg type polyoxoanions [P2Mo5O23]6–, protonated 1-(2-aminoethyl)piperazine cations and six crystallization water molecules. These anions are connected with the organic amine through hydrogen bonding interactions between the hydrogen atoms of the organic molecules and the oxygen atoms of the polyoxoanion and water molecules which generate a three-dimensional network.