Fenilsilicato dopado com Eu III obtido pelo método sol-gel Phenylsilicate doped with Eu III obtained by sol-gel methodology

• Main Authors: Eduardo J. Nassar, Lilian R. Ávila, Paula F. S. Pereira, Evelisy C. O. Nassor, Alexandre Cestari, Katia J. Ciuffi, Paulo Sergio Calefi
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2007-01-01
• Series: Química Nova
• Subjects: europium III; sol-gel; thermal analysis
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000700013

<abstract language="eng">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.