Two-dimensional layer polyoxometalate-based inorganic metal–organic hybrid supramolecular networks woven by Cu ··· O_polyoxoanion short contact weak interactions

Abstract

Two polyoxometalate-based inorganic metal-organic hybrid supramolecular complexes [Cu(2,2′-bpy)₂]₂[V^IV ₂Mo^V ₅Mo^VI ₇O₃₈(PO₄)] (1) (2,2′-bpy = 2,2′-bipyridine) and [Cu(2,2′-bpy)₂]₂[Mo^VMo^VI ₁₁O₃₆(PO₄)] · 3H₂O (2), have been hydrothermally prepared and structurally characterized by single-crystal X-ray diffraction. Both complexes are constructed from polyoxoanions (the bivanadyl capped α-Keggin polymolybdate anion [V^IV ₂Mo^V ₅Mo^VI ₇O₃₈(PO₄)]⁴⁻ for 1 and the reduced 12-molybdophosphate anion [Mo^VMo^VI ₁₁O₃₆(PO₄)]⁴⁻ for 2) and copper(II) complex cations [Cu(2,2′-bpy)₂]²⁺, forming two-dimensional (2D) layer network structures, in which the polyoxoanion and the complex fragment cation connect with each other through Cu ··· O_polyoxoanion short contact weak interactions, which mediate ferromagnetic interaction.

Keywords:

• Polyoxometalate
• Hybrid material
• Crystal structure
• Weak interaction
• Copper(II) complex
• Magnetic property

Acknowledgements

This work was supported by National Natural Science Foundation of China (Nos. 20201012, 20473096, 90101025), the Major State Basic Research Development Program of P.R. China (2001CB610507) and Chinese Academy of Sciences.