Self-assembly and characterization of homo- and heterodinuclear complexes of zinc(II) and lanthanide(III) ions with a tridentate Schiff-base ligand.
Fiche publication
Date publication
janvier 2006
Auteurs
Membres identifiés du Cancéropôle Est :
Pr LEHN Jean-Marie
Tous les auteurs :
Patroniak V, Stefankiewicz AR, Lehn JM, Kubicki M, Hoffmann M
Lien Pubmed
Résumé
Tridentate Schiff-base ligand HL (L = C12H9N2O) reacts with lanthanide(iii) nitrates to give complexes of formulae [M2L3(NO3)(3)], where M = y(3+) (1), La3+ (2), Nd3+ (3), Sm3+ (4), Eu3+ (5), Gd3+ (6), Tb3+ (7), Dy3+ (8), Ho3+ (9), Lu3+ (10), and [(MML3)-L-1(NO3)x], where M = Eu3+, and M-1 = Dy3+ (11), Zn2+ (12); x = 3 for 11 and 2 for 12. The structures of the complexes have been assigned on the basis of the spectroscopic data (solution analysis) and microanalyses. In the case of complexes 3, 5, 8 and 12 the structures have been confirmed by X-ray crystallography. The structural analysis of the dinuclear complexes showed the presence of two metal atoms [M(1) and M(2)] and three ligands, L. Each lanthanide atom is coordinated to by 9 donor atoms with typical Ln-N and Ln-O distances. Zinc(II) is coordinated to by two oxygen atoms and four nitrogen atoms from two ligands. The metal ions are bridged by the phenoxo oxygen atoms of the ligands. We have obtained a heterodinuclear complex by a rapid one-step reaction. Quantum mechanical calculations indicated that the formation of heterodinuclear complex 12 is slightly favored energetically over the homodinuclear complex 5. (c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006).
Référence
Eur J Inorg Chem. 2006 Jan 9;1:144-9.