Luminescence enhancement of the Tb(III) ion with the thenoyltrifluoroacetonate ligand acting as an efficient sensitizer

Ercules E. S. Teotonio, Francisco A. Silva, Dariston K. S. Pereira, Lidiaine M. Santo, Hermi F. Brito, Wagner M. Faustino, Maria Claudia F. C. Felinto, Regina Helena Santos, Rodolfo Moreno-Fuquen, Alan R. Kennedy, Denise Gilmore

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11 Citations (Scopus)

Abstract

The synthesis, structural investigation, and photophysical properties of the complex [Tb(TTA)(2)(NO3) (TPPO)(2)] are reported. Unlike the analog tris-diketonate complex [Tb(TTA)(3)(TPPO)(2)], the new complex presents abnormally high luminescence intensity centered on the terbium ion. Our results clearly suggest a higher energy transfer efficiency from the TEA antenna ligand to the Tb(III) ion in the bis-diketonate complex compared with that in the tris-diketonate complex. A mechanism involving the increasing of triplet state energy when one TTA ligand is replaced by the NO3- group in the first coordination sphere is suggested and experimentally investigated to explain the anomalous luminescence properties of the new complex [Tb(TTA)(2)(NO3)(TPPO)(2)].

Original languageEnglish
Pages (from-to)1391-1395
Number of pages5
JournalInorganic Chemistry Communications
Volume13
Issue number12
DOIs
Publication statusPublished - Dec 2010

Keywords

  • terbium
  • luminescence
  • thenoyltrifluoroacetonate
  • sensitizer
  • energy transfer
  • intramolecular energy-transfer
  • complexes
  • photoluminescent
  • excitation
  • spectra

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    Teotonio, E. E. S., Silva, F. A., Pereira, D. K. S., Santo, L. M., Brito, H. F., Faustino, W. M., ... Gilmore, D. (2010). Luminescence enhancement of the Tb(III) ion with the thenoyltrifluoroacetonate ligand acting as an efficient sensitizer. Inorganic Chemistry Communications, 13(12), 1391-1395. https://doi.org/10.1016/j.inoche.2010.07.043