Long-lived MLCT excited states-Ru-II complexes with a helical bis-phen ligand. (Articolo in rivista)

Type
Label
  • Long-lived MLCT excited states-Ru-II complexes with a helical bis-phen ligand. (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Goze, C.; Chambron, J. C.; Heitz, V.; Pomeranc, D.; Salom-Roig, X. J.; Sauvage, J. P.; Morales, A. F.; Barigelletti, F. (2003)
    Long-lived MLCT excited states-Ru-II complexes with a helical bis-phen ligand.
    in European journal of inorganic chemistry (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Goze, C.; Chambron, J. C.; Heitz, V.; Pomeranc, D.; Salom-Roig, X. J.; Sauvage, J. P.; Morales, A. F.; Barigelletti, F. (literal)
Pagina inizio
  • 3752 (literal)
Pagina fine
  • 3758 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • In this paper are analyzed reasons for the outstanding luminescence properties of a photoactive unit, a candidate for inclusion within a rotaxane or a pseudorotaxane assembly (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ISOF-CNR, Italy and University of Strasbourg, France (literal)
Titolo
  • Long-lived MLCT excited states-Ru-II complexes with a helical bis-phen ligand. (literal)
Abstract
  • The synthesis of a new Ru-II complex [Ru(L-1)(4,7-dpphen)](2+), bearing a tetradentate bis-1,10-phenanthroline ligand L-1, is described. X-ray crystal structure analysis shows that the tetradentate ligand L, coils around the metal and occupies both axial and two of the equatorial positions of the complex. H-1 NMR studies clearly indicate that the complex has C-2 symmetry in solution. The room temperature luminescence properties of [Ru(L-1)(4,7-dpphen)](2+) have been studied, as have those of the related complex [Ru(L,)(4,4'-dmbp)](2+). For both complexes, the luminescence quantum yields and lifetimes are three to ten times higher than those of [Ru(bpy)(3)](2+). These unusual results are explained by the geometrical constraints imposed by the tetradentate ligands L-1 and L-2 in their respective complexes, resulting in an effective decoupling between the (MLCT)-M-3 and (MC)-M-3 excited states. (literal)
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