Syntheses, structures and magnetic properties of two coordination polymers based on 2,2-biphenyldicarboxylate ligand
Qingfen Zhang , Zhongyuan Zhou , Xuan Wang , Jing Lu
Chemical Research in Chinese Universities ›› 2016, Vol. 32 ›› Issue (2) : 165 -171.
Syntheses, structures and magnetic properties of two coordination polymers based on 2,2-biphenyldicarboxylate ligand
Two coordination polymers {[Co3L3(Me2NH)2]·(Me2NH)} n(1) and [CuL(bpy)] n(2)(L=2,2′-biphenyl dicarboxylate ion, bpy=4,4′-bipyridine) were obtained and characterized. Compound 1 was synthesised via solvothermal method, with the L ligands adopting syn-syn-μ 2-η 1:η 1- and μ 2-η 2-coordination modes and Co(II) centers being linked to form a 1D coordination chain with trinuclear Co3 cluster as sub-units. Compound 2 was synthesized at room temperature, with the L ligand chelating the Cu(II) centers to form a 1D chain, which was further linked by the auxiliary 4,4′-bpy ligand to form a 3D coordination network. The results of variable temperature susceptibility studies reveal that there were ferromagnetic and antiferromagnetic interactions between the paramagnetic metal centers in compounds 1 and 2, respectively.
Coordination polymer / Crystal structure / Magnetic property
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