Hydrothermal synthesis, crystal structure and properties of inorganic-organic hybrid materials based on diphosphopentamolybdate

Abstract

The compound of diphosphopentamolybdate {[Cu(en)(Hen)]₂[P₂Mo₅O₂₃]}·3H₂O [en=ethylenediamine] had been obtained from the hydrothermal method and characterized by single crystal X-ray diffraction, elemental analysis, FT-IR, and thermogravimetric analysis. The structure consist of [P₂Mo₅O₂₃]⁶⁻ clusters anions, complex [Cu(en)(Hen)]³⁺ cations and crystallization water molecules, which are held together to a two-dimensional framework. The most interesting feature of the compound is that two nitrogen atoms are both coordinated with Cu(II) in one ethylenediamine molecule, for the other ethylenediamine molecule, only one nitrogen atom is towards Cu(II) and the other nitrogen atom is protonated and formed Hen⁺.

Keywords

polyoxometalate / hydrothermal synthesis / crystal structure / coordination groups

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