Preparation and luminescence properties of silica material containing Eu(TTA)3(H2O)2
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2010
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ENCONTRO DA SBPMAT - SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, 9.
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Resumo
Rare earth ions are generally used as fluorescent probes for analytical application because of
their distinguished luminescence characteristics such as narrow spectral width, long luminescence
lifetime and large Stokes shift [1]. The luminescent functionalized silica materials have been
widely used for bioanalytical assays. These particles are typically generated by incorporating
complex into the silica matrix, and the incorporation of Eu3+
-complexes into silica particles
combines optical characteristics of Eu3+
-complexes and properties of inorganic oxides. In this
work, we prepared silica particles containing [Eu(TTA)3
(H2O)2
] complex (TTA = 2-
thenoyltrifluoroacetone) by modified Stöber method [2]. Determination of amino groups in the
material was performed using a method involving ninhydrin. The difference in morphology
between Eu3+
-complex and luminescent silica material can be attributed to the network of silica
on the material surface (Figure 1). Emission spectrum of the luminescent silica particle showed
an enlargement of the bands when compared to the complex emission spectrum. No differences in
line position were observed. The emission spectra show characteristic 5D07
FJ
(J =0–4)
transitions of Eu3+
, with the hypersensitive 5D07
F2
transition as the most prominent one.
Como referenciar
LOURENCO, A.V.S.; KODAIRA, C.A.; FELINTO, M.C.F.C.; BRITO, H.F. Preparation and luminescence properties of silica material containing Eu(TTA)3(H2O)2. In: ENCONTRO DA SBPMAT - SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, 9., 24-28 de outubro, 2010, Ouro Preto, MG. Resumos... Disponível em: http://repositorio.ipen.br/handle/123456789/21227. Acesso em: 30 Dec 2025.
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