Supramolecular Co(II)-[2 x 2] grids: metamagnetic behavior in a single molecule.
Fiche publication
Date publication
août 2006
Auteurs
Membres identifiés du Cancéropôle Est :
Pr LEHN Jean-Marie
Tous les auteurs :
Waldmann O, Ruben M, Ziener U, Muller P, Lehn JM
Lien Pubmed
Résumé
The magnetic anisotropy of the supramolecular [2 x 2] grid [Co(II)4L4]8+, with a bis(bipyridyl)-pyrimidine-based ligand L, was investigated by single-crystal magnetization measurements at low temperatures. The magnetization curves exhibit metamagnetic-like behavior and are explained by the weak-exchange limit of a minimal spin Hamiltonian including Heisenberg exchange, easy-axis ligand fields, and the Zeeman term. It is also shown that the magnetic coupling strength can be varied by the substituent R1 in the two-position on the central pyrimidine group of the ligand L.
Référence
Inorg Chem. 2006 Aug 7;45(16):6535-40.