Design of two coordination polymers based on semi-rigid tricarboxylic acid ligands of cobalt (II): Synthesis, structures and properties

Abstract

In this work, two novel coordination polymers [Co3(L)2(mida)3]n (1) and [Co3(L)2(bimb)3]n (2) have been synthesized using a semi-rigid tricarboxylic acid ligand (H3L: 3-[(1-carbox-ynaphthalen-2-yl)oxy] phthalic acid) and two nitrogen-containing heterocyclic ligands (mida: [1, 4-bis (1H-imidazol-1-yl) benzene] and bimb: {1-[4-(2H-1λ4-imidazol-1-yl) methyl]benzyl}-1H-imidazole). The results of single crystal X-ray diffraction show that the Co-based coordination polymer 1 have a two-dimensional (2D) layered structure, while the coordination polymer 2 presents a three-dimensional (3D) spatial configuration. In addition, the coordination polymers 1 and 2 exihit better selectively catalytic degradation performances of dyes, indicating that Co-based coordination polymers have potential application values in dye degradation.