Spectroscopic study of the Eu(fod)3 complex adsorbed on a 3-trimethoxypropylthioethylamine modified silica surface

• Published in: Journal of the Serbian Chemical Society Vol. 69; no. 5; pp. 387 - 392
• Main Authors: GILBERTO F. DE SA, GILMARA G. PEDROSA, JUCIMAR M. DE SOUZA, MAGDAR. S. VIEIRA, SEVERINO ALVES JR, MONICA F. BELIAN, ROBSON F. DE FARIAS
• Format: Journal Article
• Language: English
• Published: Serbian Chemical Society 2004
• Subjects: europium(III) complex; hybrids; luminescence; sol-gel
• ISSN: 0352-5139
• DOI: 10.2298/JSC0405387d

By using 3-mercaptopropyltrimethoxysilane and ethylenediamine as precursors, the compound 3-trimethoxypropylhioethylamine was synthesized, and then used as a silylating agent to obrtain, through a sol-gel process, an organicmodification of a silica-gel sample. Asurface thus modified was used as a substrate for the adsorption of the luminescent Eu(fod)3·2H2O complex. Eu(fod)3·2H2O and the silicon hybrid were mixed in stoichiometric amounts to produce samples with 1 %, 5 % and 10 % (m/m) of adsorbed complex. The adsorbed complex was then studied from the spectroscopic point of view. The lifetimes measured for the emission process are 476, 542 and 566 ms for 1 %, 5 % and 10 % samples, respectively. Furthermore, comparison with experimental data for n-[3(trimethoxysilyl) propyl]-ethylenediamine modified silica gel surfaces emphasizes the prominenet role of the chemical composition of the silica modified surface on the spectroscopic properties of the adsorbed complex.