Fenilsilicato dopado com Eu III obtido pelo método sol-gel

AUTOR(ES)

Nassar, Eduardo J., Ávila, Lilian R., Pereira, Paula F. S., Nassor, Evelisy C. O., Cestari, Alexandre, Ciuffi, Katia J., Calefi, Paulo Sergio

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2007

RESUMO

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.

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