Syntheses, structures, and magnetic properties of a series of Mn-containing coordination polymers based on 5-nitro-1,2,3-benzenetricarboxylic acid and different N-donor ligands

Abstract

Three new 5-nitro-1,2,3-benzenetricarboxylic acid based complexes, [Mn7(nbta)4(Hnbta)(2,2′-bipy)4(H2O)8]·2H2O (1), [MnII3MnIII(nbta)3(bimb)1.5·H2O]·2H2O (2), [Mn3(nbta)2(bix)1.5(μ2-H2O)·(H2O)6]·2H2O (3) (H3nbta = 5-nitro-1,2,3-benzenetricarboxylic acid, 2,2′-bipy = 2,2′-bipyridine, bimb = 1,1′-(1,4-butanediyl)bis(imidazole), bix = 1,4-bis(imidazol-1-ylmethyl)benzene), were hydrothermally synthesized. Complex 1 exhibits a 3D framework constructed from Mn4 cores, displaying the α-Po net with 41263 topology. Complexes 2 and 3 present a 2D network with multinuclear clusters as the linking nodes. All the complexes were suitably characterized by elemental analysis, FTIR spectra, thermogravimetric analysis and X-ray diffraction techniques. Moreover, direct current magnetic susceptibility measurements were carried out to study their magnetic properties.