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}期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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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}

Authors:	Firasat Hussain Stefan Sandriesser Greta R Patzke

Institution:	^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

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=Eu^III, Gd^III, Tb^III, Dy^III, Ho^III, Er^III, Tm^III, and Yb^III) 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 Gd^III-complex which exhibits near perfect Curie-type behavior.

Keywords:	Polyoxotungstates Germanium Gadolinium Magnetism Lanthanoids
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