Systematic Study of the Interaction Between VIV Centres and Lanthanide Ions MIII in Well Defined {VIV 2MIII}{AsIIIW9O33}2 Sandwich Type Clusters: Part 1

A new type of heteropolytungstate is reported that contains in a triangular arrangement one lanthanide f element and two d transition metals in form of heteroatoms. The first example in this series is the monoclinic Na3K5[((VO)2Dy(H2O)4K2(H2O)2Na(H2O)2)(α-B-AsW9O33)2] · 23H2O (1) which was prepared...

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Bibliographic Details
Published in:Journal of cluster science 2007-09, Vol.18 (3), p.711-719
Main Authors: Merca, Alice, Müller, Achim, van Slageren, Joris, Läge, Mechtild, Krebs, Bernt
Format: Article
Language:English
Subjects:
Acidification
Aqueous solutions
Crystals
Ligands
Magnetic properties
Single crystals
Structural analysis
Temperature
Transition metals
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Summary:A new type of heteropolytungstate is reported that contains in a triangular arrangement one lanthanide f element and two d transition metals in form of heteroatoms. The first example in this series is the monoclinic Na3K5[((VO)2Dy(H2O)4K2(H2O)2Na(H2O)2)(α-B-AsW9O33)2] · 23H2O (1) which was prepared from an acidified aqueous solution of Na2WO4 · 2H2O, As2O3 and VOSO4 · 5H2O to which Dy3+ ions were added. The single crystal X-ray structure analysis shows that the anion 1a consists of two [α-B-AsIIIW9O33]9− trilacunary Keggin type units linked by two VO2+, one Dy3+ as well as two K+ and one Na+ ion, resulting in a sandwich-type structure with idealized C2v symmetry. The complete magnetochemical analysis shows very interesting magnetic properties, which will be considered in the full series together with the properties of the homologous compounds in due course.
ISSN:1040-7278
1572-8862
DOI:10.1007/s10876-007-0144-7