Abstract.
A new Schiff base ligand, 3-tryptimino-1-phenyl-butan-1-one (TPB), was synthesized. The fluorescence intensity of its terbium(III) complex was greatly enhanced by addition of 1,10-phenanthroline to an acetonitrile solution. Spectrofluorimetric determination of trace amounts of Tb3+ was performed based on this effect. The excitation and emission wavelengths are 293 and 546 nm, respectively. Under optimal conditions, the fluorescence intensities varied linearly with the concentration of Tb3+ in the range of 2.0 × 10−6 to 7.0 × 10−6 M with a detection limit of 2.4 × 10−9 M. Interference by some rare earth ions is described. This method was applied to the determination of trace amounts of terbium(III) in a high purity Y2O3 matrix. The mechanism of fluorescence enhancement was also studied.
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Dang, F., Liu, W. Enhanced fluorescence of 3-tryptimino-1-phenyl-butan-1-one–Tb with 1,10-phenanthroline ternary system, and its analytical application. Microchim Acta 158, 111–116 (2007). https://doi.org/10.1007/s00604-006-0684-9
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DOI: https://doi.org/10.1007/s00604-006-0684-9