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Abstract
The results of studies related to synthesis and spectroscopic properties of polyoxometalates (POM) and their europium(III) and neodymium(III) complexes (Ln/POM) are presented. A series of lanthanide(III) sandwiched Ln(POM) 2, Ln 2POM or encapsulated within the cavity of the POM complexes, synthesized for these studies, were verified based on the results of thermogravimetric analysis and infrared spectroscopy. Absorption of Nd(III) and luminescence (excitation and emission) spectra of Eu(III) as well as results of Eu(III) ion lifetime measurements were used for characterization of the complexes. The Eu(III) luminescence lifetimes, measured both for solid and aqueous solutions, indicate that the sandwiched complexes Eu(POM) 2 have no water of hydration, whereas the complexes Eu 2POM have four or six water molecules, and europium-encrypted derivatives three or four H 2Os in the Eu(III) inner coordination sphere.
Published Version
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