A Stable 3 d -4 f Heterometallic Cluster with Magneto-Optical Activity.

A stable 3 d -4 f heterometallic cluster, namely, {Dy 4 Ni 5 L 10 (NO 3 ) 4 (CO 3 ) 4 (CH 3 OH) 2 }·CH 3 CN (Dy 4 Ni 5 , HL = 8-hydroxyquinoline), has been solvothermally synthesized and structurally characterized. The compound exhibits an interesting structure in which a tetrahedron based on 4 f ions interpenetrates with a square pyramid based on 3 d ions. Besides, a unique intermolecular interaction was found in Dy 4 Ni 5 , giving rise to its high stability not only when it is in the solid state but also when it dissolves in organic solvents. In addition, the magnetic behavior of solid Dy 4 Ni 5 and the magneto-optical activity of the Dy 4 Ni 5 solution were also studied.