Oclusão de pares iônicos em espaços interlamelares como ferramenta para formação de híbridos luminescentes baseados em V IND. 2 O IND. 5 e MoO IND. 3 / Interlayer occlusion of ion pairs as tool for the production of V2O5 and MoO3-based luminescent materials

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

24/02/2010

RESUMO

In the first part of this work, novel hybrid materials were developed by insertion of poly(diallymethylammonium chloride) PDDA and poly(allylamine hydrochloride) PAH polyelectrolytes into V2O5 and MoO3 interlayer spaces using hydrothermal treatment. A systematic study of the synthesis of hybrids materials by direct in situ reaction of PDDA and PAH polycations with V2O5 and MoO3 powders showed that the interlayer space of V2O5 and MoO3 expands significantly upon intercalation using PDDA and PAH polyelectrolytes. Reduction of V to V and Mo to Mo intercalation of the polyelectrolytes as charge balancing entities possible and, consequently, the generation of anionic exchange sites in theses oxides layers. The hybrid materials produced, [PDDACl]0.24[PDDA]0.29V2O5 and [PAHCl]0.28[PAH]0.47V2O5 exhibited approximately 45.0 % and 38.0 % of chloride ions still available for anionic exchange, respectively. The hybrids [PDDACl]0.26[PDDA]0.24MoO3 and [PAHCl]0.18[PAH]0.38MoO3 presented approximately 52,9 % and 32,0 % of chloride ions anionic exchange, respectively. In the second part of this study, these materials were used to encapsulate the cyanine anionic dye. The presence of the dye was evidenced by significant fluorescence, with emission band centered at 605-620 nm regions.

ASSUNTO(S)

Óxidos metálicos intercalação troca iônica luminescência metal oxides intercalation ion exchange luminescence

ACESSO AO ARTIGO

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