Publicação: Synthesis and some properties of hybrid gels of titanium oxide containing europium (III)
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1999-05-01
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Elsevier B.V.
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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.
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Journal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 247, p. 120-123, 1999.
