Europium incorporated in silica matrix obtained by sol-gel: luminescent materials

AUTOR(ES)

Nassar, Eduardo José, Ciuffi, Katia Jorge, Ribeiro, Sidney José Lima, Messaddeq, Younes

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2003-12

RESUMO

In this work we report some aspects of the chemistry involved in the preparation of modified silicon oxide by the sol-gel process. Europium III compounds were used as luminescent probe. An organic-inorganic hybrid was obtained by hydrolysis of tetraethylorthosilicate (TEOS) and 3-aminopropyltriethoxysilane (APTS). The Eu III compounds were added in different ways. In the first, silica was prepared in the presence of Eu III, and in the second, Eu III was added on the silica surface. These materials were studied by luminescence, infrared spectroscopy and termogravimetric analysis. The results obtained for the hybrid material show different behavior for Eu III emission, which could be excited by the antenna effect and the influence of the surrounding in the luminescence quenching. The thermogravimetric data present different mass loss in samples to range temperature 50 - 150 °C. Thermogravimetric and infrared spectra showed that inorganic polymers incorporated the organic part.

Documentos Relacionados

• Europium incorporated into titanium oxide by the sol-gel method
• Synthesis of Titania-Silica Materials by Sol-Gel
• Incorporation of europium III complex into nanoparticles and films obtained by the Sol-Gel methodology
• Luminescent hybrid porphyrinosilica obtained by sol gel chemistry
• Phosphoric acid adsorbed on silica-ceria matrix obtained by sol-gel method: studies of local structure, texture and acid property