title: Magnetic properties of two 2D complexes based on 1D chain containing [Fe(bpy)(CN)4]- unit.
abstract: Two heterobimetallic 2-dimensional layer complexes, {[Fe(bpy)(CN)(4)](2)M(4,4'-bipyridine)}·4H(2)O [bpy = 2,2'-bipyridine, M = Mn (1), Cu (2)] have been prepared by diffusion and their structures determined by single crystal X-ray diffraction. 1 and 2 are isomorphous, made of neutral bimetallic [Fe(bpy)(CN)(4)](2)M(4,4'-bipyridine)] layers and uncoordinated water molecules located between the layers. Interestingly, complex 2 shows the compression of the Jahn-Teller distortion around the copper(II) ion. Magnetic investigation shows antiferromagnetic coupling between the manganese(II) and iron(III) ions mediated by bridging CN(-) in 1, while ferromagnetic coupling between the copper(II) and iron(III) ions is seen in 2. Both complexes 1 and 2 reveal a metamagnetic-like behaviour with different critical fields (H(c), at 1.8 K): 2.0 kOe (1) and 3.2 kOe (2). The weak interchain antiferromagnetic interaction can be illustrated by the spin-polarization mechanism.
authors.affiliation: State Key Lab of Coordination Chemistry and School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road 22, Nanjing 210093, P. R. China.
authors.forename: Xiao-Jiao
authors.initials: XJ
authors.lastname: Song
authors.forename: Mohd
authors.initials: M
authors.lastname: Muddassir
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen
authors.forename: Hui-Sheng
authors.initials: HS
authors.lastname: Wang
authors.forename: You
authors.initials: Y
authors.lastname: Song
authors.forename: Xiao-Zeng
authors.initials: XZ
authors.lastname: You