Trigonal (-3) symmetry octahedral lanthanide(III) complexes of zwitterionic tripodal ligands: luminescence and magnetism - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Supramolecular Chemistry Année : 2016

Trigonal (-3) symmetry octahedral lanthanide(III) complexes of zwitterionic tripodal ligands: luminescence and magnetism

Résumé

Sandwich coordination complexes, [LnIII(H3L)2]X3∙solvents, of Tb(III), Eu(III), Dy(III), Ho(III) and Er(III) were prepared with two new zwitterionic ester-substituted tripodal amine ligands, tris((2-hydroxy-5-n-butyl benzoate)aminoethyl)-amine (H3L1) and tris((2-hydroxy-5-methyl benzoate)aminoethyl)-amine (H3L2). These ligands were synthesised by condensation of the appropriately substituted salicylaldehyde with tris(2-aminoethyl)amine (tren) followed by in situ reduction of the tris-imine to tris-amine. Subsequent 2:1 reaction with lanthanide(III) ions yields [LnIII(H3L)2]X3∙solvents (L = L1, L2; X = Cl−, NO3−; solvents = MeOH or H2O). All complexes were characterised by microanalysis, infrared spectroscopy, high resolution mass spectrometry and solid-state photoluminescence measurements. The crystal structures of [TbIII(H3L1)2]Cl3·6MeOH, [Dy(H3L1)2]Cl3·6MeOH, [EuIII(H3L1)2]Cl3·6MeOH and [TbIII(H3L1)2](NO3)3 reveal high-crystallographic −3 symmetry at the O6-coordinated octahedral lanthanide(III) ions and that the tripodal ligands are bound in zwitterionic form: the protons from the phenolic oxygens have migrated to the amino nitrogens....
Fichier non déposé

Dates et versions

hal-01348908 , version 1 (26-07-2016)

Identifiants

Citer

Daron E. Janzen, Michael Juchum, Shaun R. Presow, Tanya K. Ronson, Wolfgang Mohr, et al.. Trigonal (-3) symmetry octahedral lanthanide(III) complexes of zwitterionic tripodal ligands: luminescence and magnetism. Supramolecular Chemistry, 2016, 28 (1-2), pp. 125-140. ⟨10.1080/10610278.2015.1102264⟩. ⟨hal-01348908⟩

Collections

CNRS INC-CNRS
121 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More