Lanthanide hexafluoroacetylacetonates vs. nitrates for the controlled loading of luminescent polynuclear single-stranded oligomers - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemical Science Année : 2013

Lanthanide hexafluoroacetylacetonates vs. nitrates for the controlled loading of luminescent polynuclear single-stranded oligomers

A. Zaim
  • Fonction : Auteur
N.D Favera
  • Fonction : Auteur
L. Guenee
  • Fonction : Auteur
H. Nozary
  • Fonction : Auteur
T.N.Y. Hoang
  • Fonction : Auteur
S.V. Eliseeva
S. Petoud
C. Piguet
  • Fonction : Auteur

Résumé

This work demonstrates how minor structural and electronic changes between Ln(NO3)3 and Ln(hfac)3 lanthanide carriers (Ln = trivalent lanthanide, hfac = hexafluoroacetylacetonate) lead to opposite thermodynamic protocols for the metal loading of luminescent polynuclear single-stranded oligomers. Whereas metal clustering is relevant for Ln(hfac)3, the successive fixation of Ln(NO3)3 provides stable microspecies with an alternated occupancy of the binding sites. Partial anion dissociation and anion/ligand bi-exchange processes occur in polar aprotic solvents, which contribute to delay the unambiguous choice of a well-behaved neutral lanthanide carrier for the selective complexation of different trivalent lanthanides along a single ligand strand. Clues for further improvement along this stepwise strategy are discussed.
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Dates et versions

hal-00817505 , version 1 (24-04-2013)

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Citer

A. Zaim, N.D Favera, L. Guenee, H. Nozary, T.N.Y. Hoang, et al.. Lanthanide hexafluoroacetylacetonates vs. nitrates for the controlled loading of luminescent polynuclear single-stranded oligomers. Chemical Science, 2013, 4 (3), pp.1125-1136. ⟨10.1039/C2SC21982D⟩. ⟨hal-00817505⟩
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