Synthesis and some properties of hybrid gels of titanium oxide containing europium (III)
Nenhuma Miniatura disponível
Data
1999-05-01
Autores
Calefi, Paulo S.
Nassar, Eduardo J. [UNESP]
Neri, Cl áudio R.
Serra, Osvaldo A.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
In this work, we report the synthesis and properties of TiO2 and of an organic-inorganic hybrid of TiO2 where the inorganic network was obtained by hydrolysis (sol-gel process) of the titanium tetraisopropoxide precursor. Both materials were prepared and dried in air. The organic oligomer was synthesized by esterification between ethylene glycol and dipicolinic acid, using Eu3+ as probe. These materials were studied by luminescence and infrared spectroscopies, thermogravimetric analysis and X-ray diffraction. The results obtained for the hybrid material show the formation of two crystalline polymers. Eu3+ has been used as structural probe due to its photophysical properties and also as emission center for luminescent materials and the luminescence data indicate that Eu3+ occupies one kind of site that is isolated from water molecules and OH groups. (C) 1999 Elsevier B.V. B.V. All rights reserved.
Descrição
Palavras-chave
Como citar
Journal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 247, p. 120-123, 1999.