Crystal structure and characterization of a novel luminescent 1D coordination polymer: [Ca9(μ–H2O)9(picolinate)18]·4H2O

• A 1D coordination polymer is presented.
• The crystals were grown by single gel diffusion technique.
• The structure possesses a large asymmetric unit.
• The hydrogen bonding interactions construct a 2D supramolecular architecture.
• Exhibits intense fluorescence

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 Pī. 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.

Schematic representation of array of bridged Ca(II) atomsSingle crystals of a new 1D coordination polymer [Ca9(μ–H2O)9(picolinate)18]·4H2O have been grown by single gel diffusion technique. The compound crystallizes in triclinic space group P-1. The crystal possesses a large asymmetric unit with bridging picolinate ligands and water molecules. Single crystal X-ray diffraction study revealed the polymeric structure of the compound. The compound consists of three stranded 1D chains formed by metal atoms, oxygen atoms of carboxylate group and water molecules. The luminescent properties of the ligand and the complex were also studied.Figure optionsDownload as PowerPoint slide