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2005
Tungsten
I 5700
06- 025
Aqueous Speciation Studies of Europium(III) Phosphotungstate. — The aqueous
speciation of Eu3+ and the trivacant polyoxometalate (PW9O34 )9- is studied as a function
of pH, countercation, and stoichiometry. The four species observed in these speciation
studies are isolated, crystallized, and characterized by solution multinuclear NMR
spectroscopy and single crystal XRD. Compounds (III), (V), and (VII) crystallize in the
triclinic space group P1 with Z = 2 and (VIII) in P1 with Z = 1. The incorporation of
lanthanide ions into polyoxometalates may be a unique approach to generate new luminescent, magnetic, and catalytic functional materials. — (ZHANG, C.; HOWELL,
R. C.; SCOTLAND, K. B.; PEREZ, F. G.; TODARO, L.; FRANCESCONI*, L. C.;
Inorg. Chem. 43 (2004) 24, 7691-7701; Dep. Chem., Hunter Coll., City Univ. N. Y.,
New York, NY 10021, USA; Eng.) — Schramke
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