Lanthanopolyoxotungstoborates: Synthesis, characterization, and layer-by-layer assembly of europium photoluminescent nanostructured films

resumo

New lanthanopolyoxotungstoborates, K6-xHx[Ln(BW11O39)(H2O)(3)](.)nH(2)O, Ln(III) = Sm, Eu, Tb, Er, were prepared and characterized by spectroscopic methods (Fourier transform infrared, Fourier transform-Raman, B-11 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(diallyclimethylammonium chloride). The photoluminescence behavior of these final nanostructures was investigated and compared with that of the starting Eu(Ill) polyoxometalate used as the building unit.

palavras-chave

LANGMUIR-BLODGETT-FILMS; SOLID-STATE; RARE-EARTH; POLY(ALLYLAMINE HYDROCHLORIDE); MULTILAYER FILMS; POLYOXOMETALATE; LUMINESCENCE; ELECTROCHEMISTRY; NANOPARTICLES; SURFACES

categoria

Chemistry; Science & Technology - Other Topics; Materials Science; Physics

autores

Sousa, FL; Ferreira, ACAS; Ferreira, RAS; Cavaleiro, AMV; Carlos, LD; Nogueira, HIS; Rocha, J; Trindade, T

nossos autores

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