Syntheses, structures, and fluorescent and magnetic properties of four metal–organic coordination polymers constructed from dicarboxylate ligands

Abstract

Four new coordination polymers, namely [Cd(OBA)(H2O)3]n (1), [Zn2(OBA)2(PBHB)2]n (2), [Mn(OBA)(BBHB)2]n (3), and [Co(MIP)(BPP)]n (4) (H2OBA = 4-oxyacetate-benzoic acid, PBHB = 1,1′-(1,3-propanediyl)bis-1H-benzimidazole, BBHB = 1,1′-(1,4-butanediyl)bis-1H-benzimidazole, H2MIP = 5-methylisophthalic acid, and BPP = 1,3-bis(4-pyridyl)propane)), were prepared and structurally characterized by single-crystal X-ray diffraction. In complex 1, the Cd(II) atoms are bridged by OBA2− anions to give 1D zigzag chain, and the 1D chains are stacked into 2D network through the O–H–O hydrogen bonds. The Mn(II) and Zn(II) centers in 2 and 3 are connected by OBA2− anions to form 1D chains, which are further bridged by N-donor ligands to generate 2D layer. Complex 4 shows twofold 3D interpenetrating network. Furthermore, the fluorescence of complexes 1 and 2 and magnetic properties of 3 and 4 have also been investigated.