A new organic-inorganic hybrid tetrameric polyoxometalate assembled by monovacant Dawson [α2-P2W17O61]10 − and trivalent cerium cations

•New organic-inorganic hybrid tetrameric polyoxometalate•Four lacunary Dawson-type [α2-P2W17O61]10 − joined together by eight cerium cations•Eight isonicotinic acids as the organic pendants coordinating to cerium cations

A novel octa-nuclear cerium(III)-containing organic-inorganic hybrid polyoxometalate [N(CH3)4]8H16[{Ce(η1-C6H5NO2)2(H2O)6[Ce(H2O)3(α2-P2W17O61)]}{Ce(η2-C6H5NO2)2(H2O)5[Ce(H2O)(α2-P2W17O61)]}]2·90H2O (C6H5NO2 = isonicotinic acid) (1) was obtained, which had been hydrothermally synthesized and characterized by IR spectrum, thermogravimetric analysis (TGA), and X-ray single-crystal diffraction. Structural analysis indicated at 1 is composed of four lacunary Dawson-type units [α2-P2W17O61]10 − joined together by eight cerium cations forming an uncommon zigzag tetrameric structure with eight isonicotinic acids as the organic pendants coordinating to the cerium cations. Magnetic property studies indicate that obvious antiferromagnetic interactions exist in eight Ce3 + cations.

Graphical abstractA novel octa-nuclear cerium(III)-containing organic-inorganic hybrid tetrameric polyoxometalate based on monovacant Dawson-type units [α2-P2W17O61]10 − with eight isonicotinic acids as pendants has been synthesized and characterized.Figure optionsDownload full-size imageDownload as PowerPoint slide