NDLI: Intramolecular Energy Transfer and Co-luminescence Effect in Rare Earth Ions (La, Y, Gd and Tb) Doped with Eu$^{3+}$ β-diketone Complexes

Content Provider	Springer Nature Link
Author	Li, Ying Zhao, Yongliang
Copyright Year	2009
Abstract	In this paper, Eu$^{3+}$ β-diketone Complexes with the two ligands 1-(2-naphthoyl)-3, 3, 3-trifluoroacetonate (TFNB) and 2’2-bipyridine (bpy) have been synthesized. Furthermore, we reported a systematical study of the co-fluorescence effect of Eu(TFNB)$_{3}$bpy doped with inert rare earth ions (La$^{3+}$, Gd$^{3+}$ and Y$^{3+}$) and luminescence ion Tb$^{3+}$. The co-luminescence effect can be found by studying the luminescence spectra of the doped complexes, which means that the existence of the other rare earth ions (La$^{3+}$, Y$^{3+}$, Gd$^{3+}$ and Tb$^{3+}$) can enhance the luminescence intensity of the central Eu$^{3+}$, which may be due to the intramolecular energy transfer between rare earth ions and Eu$^{3+}$. The efficient intramolecular energy transfer in all the complexes mainly occurs between the ligand TFNB and the central Eu$^{3+}$. Full characterization and detail studies of luminescence properties of all these synthesized materials were investigated in relation to co-fluorescence effect between the central Eu$^{3+}$ and other inert ions. Further investigation into the luminescence properties of all the complexes show that the characteristic luminescence of the corresponding Eu$^{3+}$ through the intramolecular energy transfers from the ligand to the central Eu$^{3+}$. Meantime, the differences in luminescence intensity of the $^{5}$D$_{0}$→$^{7}$F$_{2}$ transition, in the $^{5}$D$_{0}$ lifetimes and in the $^{5}$D$_{0}$ luminescence quantum efficiency among all the synthesized materials confirm that the doped complex Eu$_{0.5}$Tb$_{0.5}$(TFNB)$_{3}$bpy exhibits higher $^{5}$D$_{0}$ luminescence quantum efficiency and longer lifetime than the pure Eu(TFNB)$_{3}$bpy complex and other materials.
Starting Page	641
Ending Page	647
Page Count	7
File Format	PDF
ISSN	10530509
Journal	Journal of Fluorescence
Volume Number	19
Issue Number	4
e-ISSN	15734994
Language	English
Publisher	Springer US
Publisher Date	2009-01-14
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rare earth Co-fluorescence β-diketone complexes Analytical Chemistry Biochemistry Biotechnology Biophysics/Biomedical Physics Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Sociology and Political Science Spectroscopy Law Biochemistry Clinical Biochemistry Clinical Psychology

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