Fenilsilicato dopado com Eu III obtido pelo método sol-gel

Química Nova

Eduardo J. Nassar¹  Lilian R. Ávila¹  Paula F. S. Pereira¹  Evelisy C. O. Nassor¹  Alexandre Cestari¹  Katia J. Ciuffi¹  Paulo Sergio Calefi¹ 

[1] ,Universidade de FrancaFranca SP ,Brasil

关键词: europium III;    sol-gel;    thermal analysis;   

DOI  :  10.1590/S0100-40422007000700013

来源: SciELO

【 摘 要 】

In this work, we report the synthesis and the photoluminescence features of a Eu(III)-doped modified silica matrix obtained by the sol-gel method. The matrix was prepared by reaction between tetraethylorthosilicate and phenyltriethoxysilane alkoxide. The hydrolysis occurred using basic catalysis. The solids were treated at 100, 200 and 300 ºC during 4 h and the structure was determined by thermogravimetric analysis (TG/DTG), nuclear magnetic resonance (NMR 29Si and 13C), infrared spectroscopy (IR) and photoluminescence (PL). The PL spectra display the Eu(III) lines characteristic of the ion, 5D0 -> 7F J (J=0, 1, 2, 3, 4), the blue emission as ascribed in the silica matrix. The NMR and TG showed the stability of hybrid silica.

【 授权许可】

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