Croconato-containing M(III) (M = Ga, Er) complexes as potential building blocks for mono/multifunctional molecular materials - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Inorganica Chimica Acta Année : 2011

Croconato-containing M(III) (M = Ga, Er) complexes as potential building blocks for mono/multifunctional molecular materials

Flavia Artizzu
  • Fonction : Auteur
Paola Deplano
  • Fonction : Auteur
Luca Pilia
  • Fonction : Auteur
Angela Serpe
  • Fonction : Auteur
Luciano Marchio
  • Fonction : Auteur
Kevin Bernot
Maria-Laura Mercuri
  • Fonction : Auteur

Résumé

The one-pot synthesis and structural characterization of two new complexes of the croconato ligand (C5O5)2 with the Ga(III) and Er(III) metal ions are reported. The mononuclear tris-chelated (n-Bu4N)3[- Ga(C5O5)3], 1, which exhibits an octahedral geometry, is present as D and K enantiomers in equal amounts; the K2[Er(C5O5)(l-SO4)(OH2)4]2 complex, 2, shows dinuclear erbium moieties with bridging sulfate anions and interposed K(I) cations with a capped trigonal prismatic coordination geometry. 2 shows paramagnetic behavior in the 2-300 K range typical of two isolated Er(III) ions. Vibrational (FTIR and FT-Raman) and electronic spectroscopies have shown to be a reliable diagnostic tool in distinguishing different molecular arrangements of the croconato ligand in different complexes. The analogies of the gallium complex with the corresponding [M(C2O4)3]3 tris-chelated complexes which have been used as chiral building blocks of molecular conductors are pointed out.

Dates et versions

hal-00588863 , version 1 (26-04-2011)

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Citer

Flavia Artizzu, Paola Deplano, Luca Pilia, Angela Serpe, Luciano Marchio, et al.. Croconato-containing M(III) (M = Ga, Er) complexes as potential building blocks for mono/multifunctional molecular materials. Inorganica Chimica Acta, 2011, 370, pp.471-481. ⟨10.1016/j.ica.2011.02.023⟩. ⟨hal-00588863⟩
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