Jump to main content
Jump to site search


NiII–LnIII complexes with o-vanillin as the main ligand: syntheses, structures, magnetic and magnetocaloric properties

Author affiliations

Abstract

ortho-Vanillin in the presence of nickel and lanthanide ions yields three types of heteronuclear NiII–GdIII complexes, ranging from dinuclear to tetranuclear defect dicubane complexes, as demonstrated by their structural determinations. These complexes are dependent on the solvents used during the reaction processes and on the retained lanthanide ions, as characterized by an increase in their Lewis acid character on moving from lighter to heavier lanthanide ions. Intramolecular ferromagnetic NiII–GdIII interactions are present in the heterodinuclear NiII–GdIII entities, whereas ferromagnetic NiII–NiII and NiII–GdIII interactions dominate above 2 K in the tetranuclear NiII2–GdIII2 compounds, devoid of any GdIII–GdIII interaction. The effect of a magnetic field on the magnetic entropy and adiabatic temperature changes is maximum near the liquid-helium boiling temperature, mainly determined by the relative weakness of the magnetic interactions.

Graphical abstract: NiII–LnIII complexes with o-vanillin as the main ligand: syntheses, structures, magnetic and magnetocaloric properties

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Nov 2017, accepted on 11 Dec 2017 and first published on 11 Dec 2017


Article type: Paper
DOI: 10.1039/C7DT04293K
Citation: Dalton Trans., 2018, Advance Article
  •   Request permissions

    NiII–LnIII complexes with o-vanillin as the main ligand: syntheses, structures, magnetic and magnetocaloric properties

    J. Costes, F. Dahan, L. Vendier, S. Shova, G. Lorusso and M. Evangelisti, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C7DT04293K

Search articles by author

Spotlight

Advertisements