Hydrothermal synthesis of three zinc(II) coordination polymers from 0D to 2D: Synthesis, structure, luminescence properties and effect of auxiliary ligand on their structural architectures

Abstract

Three new coordination compounds, [Zn2(bppc)2(bdc)(H2O)2]·4H2O(1) [Zn4(bppc)2(o-bdc)2(ox)(H2O)2]n·2nH2O (2), [Zn2(bppc)(ox)1.5(H2O)2]n·3.5nH2O (3) (Hbppc = 2,6-bis(pyrazin-2-yl)pyridine-4-carboxylate, H2bdc = 1,4-benzenedicarboxylic acid, H2(o-bdc) = 1,2-benzenedicarboxylic acid, H2ox = oxalic acid), with different structural dimensionality (0D, 1D and 2D, respectively) have been hydrothermally synthesized and structurally characterized. Single crystal X-ray analysis revealed that compound 1 shows a dimer structure, compound 2 and 3 show one-dimensional ring chain structure and two-dimensional structure respectively. The structure differences of 1–3 show that the aromatic acid as auxiliary ligand have important influence on the final structures. Additionally, the luminescent properties of 1–3 have been investigated with fluorescent spectra in the solid state, and 1–3 display a strong fluorescent emission at room temperature and have potential applications as fluorescent-emitting materials.