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Journal of Fluorescence

, Volume 23, Issue 5, pp 939–946 | Cite as

Synthesis and Photoluminescent Properties of Lanthanides Acetoacetanilide Complexes

  • E. R. Souza
  • C. H. F. Zulato
  • I. O. Mazali
  • F. A. Sigoli
ORIGINAL PAPER

Abstract

This work reports on the photoluminescent properties of three new lanthanide complexes with acetoacetanilide (aaa), a β-diketonate ligand. The complexes have the general molecular formulae [RE(aaa)3(H2O)], they are soluble in organic solvents such as ethanol and chloroform and insoluble in water. The energy of the triplet state was determined at about 4,700 cm−1 higher than the 5D4 emitting level of the Tb(III) ion, leading to an absolute quantum yield of 22 % for the [Tb(aaa)3(H2O)] complex. The photoluminescent properties were studied and the luminescence parameters of the [Eu(aaa)3(H2O)] complex were experimentally determined. The photostabilities of the complexes under continuous UV irradiation were measured and the data indicate low stability of the [Tb(aaa)3(H2O)] complex when the system is excited at the band attributed to energy transfer from the ligand to terbium(III) ion. However, its photostability is significantly improved under inert atmosphere.

Keywords

Luminescence Beta-diketone complexes Terbium(III) Europium(III) 

Notes

Acknowledgments

ERS is indebted to CAPES for a PhD fellowship. IOM and FAS are indebted to CNPq and FAPESP for financial support. The authors would like to thank Prof. C. H. Collins (IQ-UNICAMP, Campinas, Brazil) for English revision and the Multiuser Laboratory of Advanced Optical Spectroscopy (LMEOA/IQ-UNICAMP/FAPESP 2009/54066-7). This work is a contribution of the National Institute of Science and Technology in Complex Functional Materials (CNPq-MCT/Fapesp).

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • E. R. Souza
    • 1
  • C. H. F. Zulato
    • 1
  • I. O. Mazali
    • 1
  • F. A. Sigoli
    • 1
  1. 1.Laboratory of Functional Materials - Institute of ChemistryUniversity of Campinas - UnicampCampinasBrazil

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