Synthesis, structure and magnetic property of the first 2-D organic–inorganic hybrid sandwich-type polyoxotungstate containing O-donor organic ligands

An unprecedented 2-D organic–inorganic hybrid sandwich-type polyoxotungstate containing O-donor organic ligands [DMAH]4{[Mn(DMF)4]2[Mn4(DMF)2(α-B-HPW9O34)2]} (1) (DMA = dimethylamine, DMF = N,N-dimethylformamide) has been solvothermally synthesized and characterized by IR, UV spectra and X-ray single-crystal diffraction. The 2-D organic–inorganic hybrid network of 1 is built by tetra-MnII substituted sandwich-type polyoxotungstates [Mn4(DMF)2(α-B-HPW9O34)2]8− and [Mn(DMF)4]2+ cation bridges, which displays the common 2-D (4,4) topological net. It should be noted that the major difference between [Mn4(DMF)2(α-B-HPW9O34)2]8− in 1 and the reported [Mn4(H2O)2(α-B-PW9O34)2]10− is that two DMF ligands substitute two H2O ligands on the Mn4O16 unit located in the sandwich belt. Magnetic susceptibility measurement indicates the occurrence of antiferromagnetic coupling interaction within MnII ions.

An unprecedented 2-D organic–inorganic hybrid sandwich-type polyoxotungstate containing O-donor organic ligands [DMAH]4{[Mn(DMF)4]2[Mn4(DMF)2(α-B-HPW9O34)2]} (1) has been solvothermally synthesized and characterized by elemental analysis, IR, UV spectra and X-ray single-crystal diffraction.Figure optionsDownload as PowerPoint slide