Construction of Two One-Dimensional Coordination Polymers by 5-Chlorosalicylic Acid Plus N-Donor Ligand: Synthesis, Structure and Catalytic Properties

Abstract

Two novel coordination polymers, namely, [Co(HL5)(4,4′-bpy)1.5(H2O)2]n·n(HL5) (1) and [Zn(HL5)2(4,4′-bpy)]n (2) (H2L5 = 5-chlorosalicylic acid), have been hydrothermally synthesized through the reaction of 5-chlorosalicylic acid with divalent transition-metal salts in the presence of N-donor ancillary coligand (4,4′-bpy = 4,4′-bipyridine). Polymer 1 exhibits one-dimensional (1D) infinite ladderlike chain, which is extended into a 2D supramolecular network via O–H···O hydrogen-bonding interactions. In polymer 2, 4,4′-bpy acts as a bidentate ligand to bind Zn(II) ions to form a [Zn(4,4′-bpy)]n infinite zigzag chain structure, which is linked by hydrogen bonds into a 3D suparmolecular assembly. Also, IR spectra, powder X-ray diffraction, fluorescence Properties and thermal decomposition process of polymers were investigated. Moreover, both compounds exhibit catalytic properties on degradation of methyl orange in Fenton-like process.