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Development of a new ternary photoluminescence enhancement system of Eu–N-(2-hydroxy-1-naphthaldehyde)-1,8-diaminonaphthalene–1,10-phenanthroline for trace determination of Eu3+

Authors
Journal
Journal of Luminescence
0022-2313
Publisher
Elsevier
Volume
143
Identifiers
DOI: 10.1016/j.jlumin.2013.04.026
Keywords
  • Photoluminescence
  • 1
  • 10-Phenanthroline
  • Schiff Base
  • Rare Earths
  • Determine

Abstract

Abstract A new Schiff base ligand N-(2-hydroxy-1-naphthaldehyde)-1,8-diaminonaphthalene (NHND) was synthesized and characterized, and a new ternary photoluminescence enhancement system Eu–NHND–1,10-phenanthroline in acetonitrile was successfully developed to determine trace amounts of Eu3+. The excitation and emission wavelengths were 274 and 617nm, respectively. Under optimal conditions, the photoluminescence intensities of the system showed a linear response toward Eu3+ in the range of 7.0×10−8 to 3.2×10−6M with a detection limit of 7.5×10−9M. The interferences of other trivalent lanthanides and some common ions were described. The system was applied to determine the trace amounts of Eu3+ in a high purity Gd2O3 matrix and in a synthetic rare earth oxide mixture, and satisfactory results proved applicability of the system. Mechanism of energy transfer and photoluminescence enhancement was also studied.

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