Magnetic properties of two 2D complexes based on 1D chain containing [Fe(bpy)(CN)4]- unit

• Published in: Dalton transactions : an international journal of inorganic chemistry 2013-01, Vol.42 (4), p.1116-1121
• Main Authors: Song, Xiao-Jiao, Muddassir, Mohd, Chen, Ying, Wang, Hui-Sheng, Song, You, You, Xiao-Zeng
• Format: Article
• Language: English
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c2dt31757e

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.