A new series of lanthanoid containing Keggin-type germanotungstates with acetate chelators: [{l_brace}Ln(CH{sub 3}COO)GeW{sub 11}O{sub 39}(H{sub 2}O){r_brace}{sub 2}]{sup 12-} {l_brace}Ln=Eu{sup III}, Gd{sup III}, Tb{sup III}, Dy{sup III}, Ho{sup III}, Er{sup III}, Tm{sup III}, and Yb{sup III{r_brace}}

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.11.005· OSTI ID:21494188

Hussain, Firasat; Sandriesser, Stefan ^[1]; Speldrich, Manfred ^[2]

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1. Institute of Inorganic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich (Switzerland)
2. Institute of Inorganic Chemistry, RWTH Aachen University, D-52074 Aachen (Germany)

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 [{l_brace}Ln(CH{sub 3}COO)GeW{sub 11}O{sub 39}(H{sub 2}O){r_brace}{sub 2}]{sup 12-} (Ln=Eu{sup III}, Gd{sup III}, Tb{sup III}, Dy{sup III}, Ho{sup III}, Er{sup III}, Tm{sup III}, and Yb{sup III}) family with acetate chelators in the rarely observed {mu}{sub 2}: {eta}{sup 2}-{eta}{sup 1} 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. P2{sub 1}/c). Temperature-dependent magnetic susceptibility measurements were performed on the Gd{sup III}-complex which exhibits near perfect Curie-type behavior. -- Graphical abstract: A new series of acetate-chelated lanthanoid containing germanotungstates [{l_brace}Ln(CH{sub 3}COO)GeW{sub 11}O{sub 39}(H{sub 2}O){r_brace}{sub 2}]{sup 12-} (Ln=Eu to Yb) is available from a convenient one-pot reaction. The influence of the lanthanide contraction on the structural properties is discussed and the magnetic properties of the Gd-representative are investigated in detail. Display Omitted Research Highlights: {yields}Lanthanoid containing germanotungstates with acetate chelators in {mu}{sub 2} : {eta}{sup 2}-{eta}{sup 1} mode. {yields}Lanthanoid contraction in [{l_brace}Ln(CH{sub 3}COO)GeW{sub 11}O{sub 39}(H{sub 2}O){r_brace}{sub 2}]{sup 12-} (Ln=Eu{sup III}-Yb{sup III}). {yields}Facile one-pot synthesis of the lanthanoid containing germanotungstate series.

• OSTI ID: 21494188
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 1; Other Information: DOI: 10.1016/j.jssc.2010.11.005; PII: S0022-4596(10)00511-6; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACETATES
GERMANIUM COMPOUNDS
INFRARED SPECTRA
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MONOCLINIC LATTICES
MONOCRYSTALS
PH VALUE
RARE EARTH COMPLEXES
SYNTHESIS
TEMPERATURE DEPENDENCE
THERMAL GRAVIMETRIC ANALYSIS
TUNGSTATES
WATER
X-RAY DIFFRACTION
CARBOXYLIC ACID SALTS
CHEMICAL ANALYSIS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
GRAVIMETRIC ANALYSIS
HYDROGEN COMPOUNDS
MAGNETIC PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
REFRACTORY METAL COMPOUNDS
SCATTERING
SPECTRA
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS