Construction of copper(II)-dysprosium(III)-iron(III) trinuclear cluster based on Schiff base ligand: Synthesis, structure and magnetism

Three new complexes of [CuL(H2O)](3) (1), [{Cu2L(H2O)(3)}{CuL}(2)](ClO4)(2)center dot H2O (2) and {CuDyL}{Fe(CN)(6)}center dot CH3CN center dot 10H(2)O (3) (L = N, N'-ethylenebis(3-methoxy salicylideneiminato) dianion) based on Schiff base ligand was synthesized using self-assembly method, and characterized both structurally and magnetically. The asymmetric unit of complex 1 is composed of three mononuclear Cu(II) species. When complex 1 reacts to Cu(ClO4)(2)center dot 6H(2)O, complex 2 is formed. Different from 1, complex 2 contains the co-existed mono- and dinuclear Cu(II) units. Interestingly, when the Dy (III) ion and hexacyanometallate are introduced into the system, the trinuclear 3d-3d'-4f complex of 3 is formed. Magnetic studies reveal the ferromagnetic nature of complex 1 but antiferromagnetic nature of 2. For 3, the magnetic behavior is affected by both the magnetic coupling and the single ion anisotropy of Dy-III ion. (C) 2015 Elsevier B.V. All rights reserved.