A Dy complex composed of two Dy triangular units, [Dy(μ-OH)(CO)(bsc)(MeOH)(HO)](Cl)·(HO)·(MeOH) (1), was isolated and found to exhibit slow relaxation of the magnetisation under zero applied dc field, resulting in a high energetic barrier to relaxation.

Using the Schiff-base ligand 1,5-bis(2-hydroxy-3-methoxybenzylidene)carbonohydrazide (H2hmc), dinuclear and nonanuclear compounds, [Dy2(Hhmc)2(NO3)4]·THF·MeCN (1) and [Dy9(μ3-O)4(μ-OH)6(hmc)4(NO3)4(DMF)4](OH)·H2O·THF·DMF (2) are generated through the addition of different bases, respectively. Single-crystal X-ray diffraction analysis revealed a unique Dy9 core structure of complex 2, and the magnetic properties of both compounds are fully studied.

Two new hexadecanuclear lanthanide complexes employing the 1,5-bis(salicylidene)carbohydrazide (Hbsc) ligand are reported herein. These polynuclear aggregates crystallize in the R3[combining macron] space group, which is unprecedented in a family of lanthanide complexes with such high nuclearity. Magnetic susceptibility measurements reveal weak intramolecular interactions between the magnetic centres, and in the case of compound 2 (Dy), single-molecule magnet properties are observed.