One-dimensional salen-type heterospin trimetallic (3d-4f-3d ') chain-like coordination polymers: Syntheses, crystal structures and magnetic properties

Three one-dimensional (1D) heterospin trimetallic chain-like polymers [{LCu(H2O)}Ln(MeOH)(H2O)(2){(mu-CN)(2)Fe(CN)(4)}]center dot 2H(2)O (1, Ln = La; 2, Ln = Nd; 3, Ln = Gd) were prepared by substitution of the nitrato ligands in [LCuLn] complexes with [Fe(CN)(6)](3-) ions (H2L = N,N'-bis(3-methoxysalicylidene)propane-1,2-diamine). Single-crystal X-ray diffraction analysis revealed that the methyl on the salen-type ligand impeded the connection between cyanide groups and Cu(II) ions efficiently. Consequently, three novel one-dimensional (ID) trimetallic chain-like polymers were obtained with the linker [Fe(CN)(6)](3-) ions interacting only with the lanthanide ions. The magnetic investigation for 3 indicated a ferrimagnetic chain may form. (C) 2009 Elsevier B.V, All rights reserved.