Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5404316 | Journal of Luminescence | 2006 | 8 Pages |
Abstract
A new monomer, TBBA-APMES, has been synthesized by grafting 3-aminopropyl-methyl-diethoxylsiliane (APMES) to 4-tert-butylbenzoic acid (TBBA) and characterized by H NMR, C NMR and Fourier transform infrared (FT-IR). The monomer acts as a functional ligand for Tb and La ion and as a sol-gel precursor. Luminescent hybrid materials consisting of terbium-lanthanum complex covalently bonded to a silica-based network have been obtained in situ via a sol-gel approach. Through the co-hydrolysis and polycondensation, Tb3+ and La3+ can be introduced in the same molecular hybrids through the chemical Si-O network and fluorescent enhancement is observed. The luminescent behavior has been studied with the different ratios of Tb3+-La3+, suggesting that the luminescence intensities of hybrids can be enhanced obviously by the existence of La3+. The enhanced fluorescence effect may be due to the strengthening of intramolecular energy transfer efficiency by La3+.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Li-Min Zhao, Bing Yan,