Lanthanopolyoxotungstoborates: synthesis, characterization, and layer-by-layer assembly of europium photoluminescent nanostructured films |
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Authors: | Sousa Filipa L Ferreira Anabela C Ferreira Rute Sá A Cavaleiro Ana M Carlos Luís D Nogueira Helena I Rocha João Trindade Tito |
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Affiliation: | Department of Chemistry, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal. |
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Abstract: | New lanthanopolyoxotungstoborates, K6-xHxLn(BW11O39)(H2O)3].nH2O, Ln(III) = Sm, Eu, Tb, Er, were prepared and characterized by spectroscopic methods (Fourier transform infrared, Fourier transform-Raman, 11B solid-state nuclear magnetic resonance, and photoluminescence) and elemental analysis. A layer-by-layer assembly method was employed to fabricate multilayered films containing the europium heteropolyanion and the polyelectrolytes poly(sodium 4-styrenesulfonate) and poly(diallydimethylammonium chloride). The photoluminescence behavior of these final nanostructures was investigated and compared with that of the starting Eu(III) polyoxometalate used as the building unit. |
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