Artículos de revistas
Synthesis and some properties of hybrid gels of titanium oxide containing europium (III)
Fecha
1999-05-01Registro en:
Journal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 247, p. 120-123, 1999.
0022-3093
10.1016/S0022-3093(99)00045-9
WOS:000080506900022
Autor
Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.