A pentanuclear oxovanadium(V) phosphate complex with phenanthroline
authors Mafra, L; Paz, FAA; Shi, FN; Fernandez, C; Trindade, T; Klinowski, J; Rocha, J
nationality International
journal INORGANIC CHEMISTRY COMMUNICATIONS
author keywords oxovanadium phosphate; organic-inorganic hybrid; hydrothermal synthesis; V-51; P-31; solid-state NMR; crystal structure
keywords COORDINATED ORGANONITROGEN LIGANDS; CAMBRIDGE STRUCTURAL DATABASE; HYDROTHERMAL SYNTHESIS; CRYSTAL-STRUCTURE; MAGNETIC-PROPERTIES; HYBRID MATERIALS; VANADIUM-OXIDE; PHEN; BOROPHOSPHATE; FRAGMENTS
abstract A novel crystalline organic-inorganic hybrid oxovanadium(V) phosphate complex, {[V2O4(Phen)(2)(PO4)](2)VO(OH)}(3/4) {[V2O4(Phen)(2)(HPO4)](2)}(1/4) center dot 4.5H(2)O (where Phen = 1,10-phenanthroline), was isolated using the hydrothermal synthetic approach, and characterised structurally using thermal (TG and DSC) and CHN elemental analysis, vibrational spectroscopy (IR and Raman), single crystal X-ray diffraction and solid-state NMR. The structure contains two similar binuclear dioxovanadium(V) moieties, with all V5+ centres in a highly distorted octahedral coordination geometry. These are further bridged via a fifth V5+ centre, in a highly distorted tetrahedral coordination geometry, leading to the formation of a pentanuclear moiety. Individual complexes close-pack in the solid-state via offset pi-pi (between neighbouring phenanthroline residues) and hydrogen bonding interactions (with the water molecules of crystallisation). V-51 and P-31 solid-state NMR proved unequivocally the presence of these two coordination environments for the V5+ centres. (c) 2005 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 1387-7003
year published 2006
volume 9
issue 1
beginning page 34
ending page 38
digital object identifier (doi) 10.1016/j.inoche.2005.09.036
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000234520800010
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