A new series of lanthanoid containing Keggin-type germanotungstates with acetate chelators: [{Ln(CH3COO)GeW11O39(H2O)}2] {Ln=Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb} |
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Authors: | Firasat Hussain Stefan Sandriesser Greta R. Patzke |
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Affiliation: | a Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland b Institute of Inorganic Chemistry, RWTH Aachen University, D-52074 Aachen, Germany |
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Abstract: | A series of head-on complexes of lanthanoid containing germanotungstates was isolated from a one pot reaction in an acetate buffer at pH 4.5. This convenient approach brought forward the [{Ln(CH3COO)GeW11O39(H2O)}2]12− (Ln=EuIII, GdIII, TbIII, DyIII, HoIII, ErIII, TmIII, and YbIII) family with acetate chelators in the rarely observed μ2: η2-η1 mode. All compounds were structurally characterized using various solid state analytics, such as single crystal X-ray diffraction, FT-IR spectroscopy, and thermogravimetric analysis. The isostructural polyanions crystallize in the monoclinic system (S.G. P21/c). Temperature-dependent magnetic susceptibility measurements were performed on the GdIII-complex which exhibits near perfect Curie-type behavior. |
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Keywords: | Polyoxotungstates Germanium Gadolinium Magnetism Lanthanoids |
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