A new 3D hybrid architecture containing Keggin-type tungstosilicate and Cu4(EGTA)2 metallamacrocyclic cation

A new three-dimensional (3D) hybrid compound [Cu4(EGTA)2(H2O)4Cu2(H2O)8][SiW12O40]·14H2O (1), [EGTA = ethyleneglycol-bis-(2-aminoethylether)-tetra acetic acid], was conventionally synthesized and characterized by elemental analysis, IR, TG, and single crystal X-ray diffraction. In 1, the square inorganic layers formed by the coordination of tungstosilicate anions to copper ions are supported by Cu4(EGTA)2 metallamacrocyclic cations, giving a unique 3D framework with α-Po topology. Additionally, luminescent and magnetic properties of 1 are investigated in the solid state.