Phenylsilicate doped with EuIII obtained by sol-gel methodology

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 degrees C during 4 It and the structure was determined by thermogravimetric analysis (TG/DTG), nuclear magnetic resonance (NMR Si-29 and C-13), infrared spectroscopy (IR) and photoluminescence (PL). The PL spectra display the Eu(III) lines characteristic of the ion, D-5(0) -> F-7(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.