A new (8,3)-connected anionic 3-D open-framework based on paradodecatungstate and CuII linkers

The hydrothermal reaction of [H2W12O42]10− precursors and CuCl2 in a CH3COOK/CH3COOH solution (pH 3.5) led to the isolation of a new compound, KNa3[Cu(H2O)2{Cu(H2O)3}2(H2W12O42)] · 16H2O (1). Compound 1 possesses a new anionic three-dimensional (3-D) open-framework based on the [H2W12O42]10− building blocks and CuII linkers. This anionic 3-D framework represents the first example of a (8,3)-connected structural topology in POM-based solid materials. The magnetic behavior of 1 exhibits weak antiferromagnetic interaction.