A new compound based on polyoxoniobates and three types of copper complexes

Abstract

A new compound based on bi-capped Keggin polyoxoniobates and copper coordination complexes, with formula [Cu(en)2][Cu(en)2(H2O)2][Cu(en)2(H2O)]2[H4SiNb12V2O42]·7H2O (1) (en=ethylenediamine), was obtained under hydrothermal condition and characterized by single crystal X-ray diffraction, infrared spectrum (IR), powder X-ray diffraction (PXRD), Ultraviolet–visible spectroscopy (UV–vis) and electron spin resonance (ESR) analysis. Compound 1 has three different types of copper complexes in it. A [Cu(en)2]2+ and two [Cu(en)2(H2O)]2+ fragments were supported by the polyoxoniobate to form a novel polyoxoniobate tri-supported coordination complex.