Solvothermal synthesis and luminescence properties of a novel Cd(II) coordination polymer containing 3-pyridinecarboxylate and phen ligands and [TaF6]- anion

A novel chain coordination polymer {[Cd-2(H2O) (C6H4NO2)(3)(C12H8N2)(2)][TaF6]}(n) (1) [(C6H4NO2)(-) : 3-pyridinecarboxylate, C12H8N2: 1,10-phenanthroline (phen)] was prepared successfully by two-step solvothermal synthesis. The compound has been structurally characterized by elemental analysis, IR spectrum and X-ray single-crystal diffraction. In the titled compound, each Cd2+ cation adopts two O atoms from one 3-pyridinecarboxylate ligand, two N atoms from one phen ligand and two N atoms from two different 3-pyridinecarboxylate ligands to generate a slightly distorted octahedron. Neighboring two Cd2+ cations are linked by one N atom and one O atom from the same carboxylate group with the Cd center dot center dot center dot Cd distance of 8.520 angstrom. The dinuclear fragment is further extended into a 1-D infinite chain structure through N atoms and O atoms from carboxylate groups. The neighboring chains are interconnected into a three-dimensional supramolecular network by means of three types of hydrogen bonds O1(water) -H center dot center dot center dot O, C-H center dot center dot center dot O and C-H center dot center dot center dot F. In addition, the fluorescence excitation and emission spectra, quantum yield and decay lifetime of the compound have been also studied in this text. (C) 2019 Elsevier B.V. All rights reserved.