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Journal of Coordination Chemistry
Year: 2008  |  Volume: 61  |  Issue: 19  |  Page No.: 3102 - 3109

Syntheses, structures and properties of three neutral bisupporting heteropolyoxometalates

Hong-Bo Liu, Yu Sun, Ya-Guang Chen, Fan-Xia Meng and Dong-Mei Shi    

Abstract: Three neutral polyoxometalates [PVW11O40lcubM(phen)2H2Orcub2] · 3H2O (phen = 1,10’-phenanthroline, M=Co 1, Zn 2, Ni 3) are composed of water and the neutral Keggin-type polyoxometallate covalently linking a pair of transition metal complex fragments on opposite sides. The transition metal lies in the center of a distorted octahedron. Multi hydrogen-bonding interactions between coordinated waters of neutral polyoxometalate molecules and terminal oxygen atoms of Keggin units and between bridging oxygens of Keggin units and lattice water create a two dimensional layer and between the layers there exist van der Waals forces. The framework of the neutral molecule begins to decompose at ca 500°C. Compound 1 exhibits a weak antiferromagnetic interaction in the 2-300 K range.

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