Solvothermal syntheses, structures, and magnetic properties of three cobalt coordination polymers constructed from naphthalene-1,4-dicarboxylic acid and bis(imidazole) linkers

摘要: Abstract Three new Co(II) coordination polymers with formulas of {[Co2(L1)(1,4-NDC)2]·3H2O}n (1), [Co3(L2)2(HCOO)2(1,4-NDC)2]n (2) and [Co2(L2)(μ3-OH)(1,4-NDC)1.5]n (3) (1,4-H2NDC = Naphthalene-1,4-dicarboxylic acid, L1 = di(1H-imidazol-1-yl)methane, L2 = 1,4-di(1H-imidazol-1-yl)benzene) were solvothermal synthesized from 1,4-H2NDC the aid three different length-controllable auxiliary ligands fully characterized. Their structures are determined by single-crystal X-ray diffraction, IR spectra, elemental analysis, powder diffraction thermogravimetric analysis. Complexes 1 3 display 3D framework structures, corresponding to a 6-connected (412·63) net, 8-connected (424·5·63) respectively. However, it is noteworthy that complex displays 2-fold interpenetrating structure, possesses self-interpenetrating structure. Complex 2 2D 4-connected undulating plane net Moreover, magnetic studies indicate antiferromagnetic interactions between ions in four complexes.