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BIBTEX RIS

Preparação e caracterização óptica de filmes de poli(estireno sulfonados) dopados com neodímio

2005; Brazilian Chemical Society; Volume: 28; Issue: 6 Linguagem: Inglês

10.1590/s0100-40422005000600006

ISSN

1678-7064

Autores

Fernando H. Cristovan, Sebastião P. Eiras, Welington O. Cruz, Alexandre Marletta, Débora Terezia Balogh, Édson Laureto, José Leandro da Silva Duarte, Ivan Frederico Lupiano Dias,

Tópico(s)

Silicone and Siloxane Chemistry

Resumo

OF POLY(STYRENE SULPHONATE) FILMS DOPED WITH NEODYMIUM.In this work we describe the processing of poly(styrene sulphonate) films (PSS) doped with neodymium (Nd).Optical density measurements in the UV-Vis-NIR region show the typical bands observed for neodymium chloride (NdCl 3 ) in solution.In the case of films, the intensity ratio between the peaks at 800 nm ( 4 I 9/2 → 4 F 5/2 + 2 H 7/2 ) and 580 nm ( 4 I 9/2 → 4 G 5/2 + 2 G 7/2 ) is equal to 0.83.Infrared spectra present an enhancement in the absorption region of aromatic rings.Site selective luminescence spectroscopy shows that the incorporation of Nd introduces a hipsochromic shift and a line shape definition in UV luminescence compared to PSS film, decreasing the interaction between aromatic groups.In addition, the film exhibits an intense radiative transition at 1061 nm ( 4 F 3/2 → 4 I 11/2 ), comparable to the one present in crystalline materials doped with Nd.

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