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Issue 72, 2015
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Pyridine-2,6-dicarboxylic acid for the sensitization of europium(iii) luminescence with very long lifetimes

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Abstract

Convenient and mild syntheses of two europium(III) complexes, Na[Eu(dipic)2·3H2O]·4H2O (dipic = dipicolinate anions) and Na[Eu(dipic)2·phen]·H2O (phen = 1,10-phenanthroline), were reported. These two europium(III) complexes were confirmed by 1H NMR, FT-IR, UV-Vis spectroscopy, and elemental and lifetime analysis. Interestingly, the lifetimes were 2.31 ms and 2.38 ms for Na[Eu(dipic)2·3H2O]·4H2O in the solid state and in ethanol solution, respectively, though high-frequency vibrations were present in the first coordination sphere. Furthermore, the lifetime for Na[Eu(dipic)2·phen]·H2O in ethanol solution is 3.23 ms, which is the longest lifetime reported to date. The Na[Eu(dipic)2·phen]·H2O complexes exhibited a quantum yield of 36.1% in ethanol solution, which was longer than that of Na[Eu(dipic)2·3H2O]·4H2O. The value of the stimulated emission cross-section (σp) for Na[Eu(dipic)2·phen]·H2O in ethanol was very close to the values of the Nd-glass laser for practical use, which showed that it had potential application as a high-powered liquid laser medium.

Graphical abstract: Pyridine-2,6-dicarboxylic acid for the sensitization of europium(iii) luminescence with very long lifetimes

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Article information


Submitted
06 May 2015
Accepted
22 Jun 2015
First published
22 Jun 2015

RSC Adv., 2015,5, 58936-58942
Article type
Paper
Author version available

Pyridine-2,6-dicarboxylic acid for the sensitization of europium(III) luminescence with very long lifetimes

C. Tao, K. Du, Q. Yin, J. Zhu, H. Yan, F. Zhu and L. Zhang, RSC Adv., 2015, 5, 58936
DOI: 10.1039/C5RA08393A

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