Synthesis and characterization of novel polyoxometalates with an inverted-Keggin structure as a new class of building unit

• Novel polyoxometalates were prepared using a few types of organophosphates.
• X-ray analysis indicates an inverted-Keggin structure for novel polyoxometalates.
• They would be able to connect with other organic groups to form large molecules.
• They were also characterized with UV–vis, IR and Raman spectroscopy.

Novel polyoxometalates with an inverted-Keggin structure were prepared and isolated as the tetra-alkylammonium salts from an aqueous organic solution. They were characterized using elemental analysis, X-ray analysis, UV–vis, IR and Raman spectroscopy. This study demonstrates that these novel polyoxometalates with an inverted-Keggin structure could be used as a new building block material because they have both a carboxy group and an alkene part, which could react with other organic substrates.

Novel polyoxometalates with inverted-Keggin structure were synthesized using a few types of organophosphates.Figure optionsDownload as PowerPoint slide