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School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, P. R. China
; Fax: +86 225264294
State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
; Fax: +86 43185698041
J. Mater. Chem., 2010,20, 972-975
01 Sep 2009,
05 Nov 2009
First published online
10 Dec 2009
Herein we present a facile method to prepare a transparent and luminescent ionogel monolith by hydrolysis and condensation of the silylated bipyridine, which can sensitize the luminescence of europium(III) in the presence of a carboxyl-functionalized ionic liquid where Eu3+ ions are coordinated to the oxygen atoms of carboxylategroups from the ionic liquid. FT-IR, TG and photoluminescence spectroscopy were employed to characterize the obtained ionogel. The FT-IR spectrum shows that Eu3+ ions are coordinated to the ionic liquid via the oxygen atoms in the ionogel. Excitation and emission spectra verify that the energy transfer from the bipyridinegroups (covalently bound to silica) to Eu3+ ions occurs. The 5D0 quantum efficiency value and the number of water molecules coordinated to Eu 3+ ions in the ionogel have been estimated.
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Journal of Materials Chemistry
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