1D- and 2D-architectures viaself-assembly of the novel sandwich-type polyoxometalate [Zn2Sb2(B-α-ZnW9O34)2]14−

Abstract

Two novel 1D and 2D polyoxometalate (POM) frameworks based on the new [Zn₂Sb₂(B-α-ZnW₉O₃₄)₂]¹⁴⁻ building block were selectively obtained from one-pot transformations of the trilacunary Keggin-type [B-α-SbW₉O₃₃]⁹⁻ precursor via Sb/Zn exchange, followed by self-assembly of the sandwich-type polyanions. The compounds were characterized in detail with a wide range of analytical methods, including single crystal and powder X-ray diffraction, thermogravimetric analysis and various spectroscopic techniques, and their photoluminescence properties were investigated at room temperature. Electrochemical behavior of the 1D and 2D {Zn₂Sb₂}-based POMs was characterized by means of cyclic voltammetry (CV) in sodium acetate buffer solution. Both compounds are effective catalysts for the oxidation of cyclohexanol with hydrogen peroxide.