Thiophene Based Europium b-Diketonate Complexes: Effect of the Ligand Structure on the Emission Quantum Yield (Articolo in rivista)

Type
Label
  • Thiophene Based Europium b-Diketonate Complexes: Effect of the Ligand Structure on the Emission Quantum Yield (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Porzio W., Giovanella U., Vignali F., Pasini M., Destri S., Di Pietro S., Di Bari L., Mineo P. (2011)
    Thiophene Based Europium b-Diketonate Complexes: Effect of the Ligand Structure on the Emission Quantum Yield
    in Inorganic chemistry communications
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Porzio W., Giovanella U., Vignali F., Pasini M., Destri S., Di Pietro S., Di Bari L., Mineo P. (literal)
Pagina inizio
  • 5417 (literal)
Pagina fine
  • 5429 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 50 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Freund C., Porzio W., Giovanella U., Vignali F., Pasini M., Destri S.- Ismac-CNR Milano, Di Pietro S., Di Bari L. Università Pisa, Mineo P. Università di Catania (literal)
Titolo
  • Thiophene Based Europium b-Diketonate Complexes: Effect of the Ligand Structure on the Emission Quantum Yield (literal)
Abstract
  • The synthesis and the molecular and photophysical characterization, together with solid state and solution structure analysis, of a series of europium complexes based on ²-diketonate ligands are reported. The Eu(III) complex emission, specifically its photoluminescence quantum yield (PL-QY), can be tuned by changing ligands which finely modifies the environment of the metal ion. Steady-state and time-resolved emission spectroscopy and overall PLQY measurements are reported and related to geometrical features observed in crystal structures of some selected compounds. Moreover, paramagnetic NMR, based on the analogous complexes with other lanthanides, are use to demonstrate that there is a significant structural reorganization upon dissolution, which justifies the observed differences in the emission properties between solid and solution states. The energy of the triplet levels of the ligands and the occurrence of nonradiative deactivation processes clearly account for the luminescence efficiencies of the complexes in the series (literal)
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