A new planar hexanuclear dysprosium cluster exhibiting slow magnetic relaxation features

Reaction of the Schiff base ligand H${}_2$L and dysprosium acetate result in a new planar Dy${}_6$ cluster [Dy${}_6$(μ${}_3$‐OH)L${}_6$(Ac)${}_6$]·MeOH (1) [H${}_2$L = N'‐(2‐hydroxybenzylidene)‐2‐(hydroxyimino)propanohydrazide, HAc = acetic acid], which was successfully structurally and magnetically characterized. Single‐crystal X‐ray diffraction analysis revealed that 1 contained a hexanuclear dysprosium cluster [Dy${}_6$], which is composed of four Dy${}_3$ triangular units. Magnetic measurements suggest that 1 displays single‐molecule magnet (SMM) behavior which is enhanced by applying a 4000 Oe direct‐current field. The effective anisotropic barrier U${}_{eff}$/k${}_B$ = 14.9 K and the pre‐exponential factor τ${}_0$ = 1.31 × 10${}^{-6}$ s are also obtained. This work may provide more insights for the design and investigation of lanthanide‐based SMMs. (© 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)