Crystal structure and characterization of a novel luminescent 1D coordination polymer: [Ca<inf>9</inf>(μ-H<inf>2</inf>O)<inf>9</inf>(picolinate)<inf>18</inf>]·4H<inf>2</inf>O

Single crystals of a novel 1D coordination polymer, [Ca9(μ-H2O)9(picolinate)18]·4H2O were grown by single gel diffusion technique. Sodium metasilicate was used for gel preparation. Single crystal X-ray diffraction studies reveal that the compound crystallizes in triclinic space group Pi¯. The crystal possesses a large asymmetric unit with bridging picolinate ligands and water molecules. The 1D chain like structure constructs a 2D supramolecular architecture via the hydrogen bonding interactions. The grown crystals were further characterized by elemental analysis, powder X-ray diffraction study, FT-IR and UV-Visible spectral studies. The luminescent behaviour of the ligand and the complex was also investigated.