Syntheses, structures and properties of three neutral bisupporting heteropolyoxometalates

Autor:	Fan-Xia Meng, Yu Sun, Ya-Guang Chen, Dong-Mei Shi, Hong-Bo Liu
Rok vydání:	2008
Předmět:	Chemistry Inorganic chemistry Crystal structure Crystallography symbols.namesake Octahedron Transition metal Polyoxometalate Materials Chemistry symbols Antiferromagnetism Hydrothermal synthesis Molecule Physical and Theoretical Chemistry van der Waals force
Zdroj:	Journal of Coordination Chemistry. 61:3102-3109
ISSN:	1029-0389 0095-8972
DOI:	10.1080/00958970802001780
Popis:	Three neutral polyoxometalates [PVW11O40{M(phen)2H2O}2] · 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.
Databáze:	OpenAIRE
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