A novel organic–inorganic hybrid based on a dinuclear copper (II)–oxalate complex, a α-metatungstate cluster [H2W12O40]6− with catalytic activity in H2O2 decomposition

A novel organic–inorganic hybrid compound H 2 [Cu 2 (bpy) 2 (H 2 O) 2 (μ-ox)] 2 [H 2 W 12 O 40 ]·9H 2 O ( 1 ) (2,2 ′ -bipyrine and ox = oxalate) has been successfully synthesized under open-air mild reaction condition and characterized by elemental analysis, IR spectrum, thermal stability analysis, single-crystal X-ray diffraction and magnetic susceptibility measurement. The main structural feature of compound 1 is the presence of α-metatungstate cluster [H 2 W 12 O 40 ] 6− as inorganic building blocks, on which the bridged-oxalate dinuclear copper metalorganic units are supported. Magnetic susceptibility studies reveal that the compound 1 shows paramagnetic property with a magnetic moment about the Cu 2+ ion, indicating antiferromagnetic coupling between the neighboring Cu 2+ ions in the structure. The compound 1 also displays a good catalytic activity with the conversion 42.4% for H 2 O 2 decomposition.