Synthesis, structure and magnetic properties of a series of dinuclear heteroleptic Zn/Ln Schiff base complexes: effect of lanthanide ions on the slow relaxation of magnetization.

We report an investigation on the synthesis, structure and magnetic properties of a series of heteroleptic Zn/Ln complexes of the general formula [ZnLClLn(o-van)(HO)(NO)]·HO (HL = N,N'-bis(3-methoxysalicylidene)-1,2-diaminoethane; o-van = o-vanillinate; Ln = Tb (1), Dy (2), Er (3)). All the compounds exhibit a slow relaxation of their magnetization and the dysprosium analogue shows one of the highest anisotropic barriers for ZnDy complexes.

A luminescent Schiff-base heterotrinuclear ZnDy single-molecule magnet with an axial crystal field.

We report here the synthesis and investigation into the magnetic properties of a luminescent trinuclear ZnDy Schiff-base complex that exhibits a zero-field single-molecule magnet behaviour. Magneto-structural correlation confirms that the axial crystal-field is generated by the phenoxide moieties while the characteristic Dy-based luminescence is observed.