Crystal structure, infrared spectra and luminescence of a 1D Cd coordination polymer with 4-nitrophthalic acid and 1,10-phenanthroline monohydrate ligands

Abstract

A new one dimensional (1D) coordination polymer, [Cd(NPTA)(1,10 phen)(H 2 O)] n (1) (H 2 NPTA = 4 nitrophthalic acid; 1,10 phen = 1,10 phenanthroline monohydrate), has been synthesized under hydrothermal conditions and characterized by elemental analysis, single crystal X ray diffraction, solid state emission spectra, FT IR spectra, and thermogravimetric analyses. The compound belongs to tri clinic system with space group P , and exhibits a one dimensional linear chain. Each Cd with a strongly dis torted octahedral coordination geometry is six coordinated by two N atoms from one 1,10 phenanthroline ligand, three O atoms from two carboxylate groups of two different NPTA 2ligands and one O atoms from lattice water. Layer supramolecular architecture is formed by medium π-π stacking interactions between two neighboring phenanthroline rings from two independent linear chains. Studies on luminescent property of 1 exhibit the solid state emission originating from an intra ligand π → π* transition of NPTA 2ligand.

Hydrothermal Synthesis, Crystal Structure, and Optical Properties of four Supramolecular Coordination Compounds Constructed from 1,10-Phenanthroline and Polycarboxylic Acids, "Координационная химия"

“…Especially, the strong, selective, and directional hydrogen bonding interactions act as a most powerful organizing force in supramolecular assembly, resulting into 1D, 2D or 3D hydrogen-bonded architectures [3,4]. Usually, the self-assembly of supramolecules is also frequently inf luenced by several factors, like the organic ligands, the geometric requirements of the metal atom, the anionic counter-ions, the reaction temperature, and the solvent system effect [5][6][7]. The key to construction of a desired architecture is the selection of organic ligands, and in some cases, a subtle alteration of organic ligands can lead to a new architecture [8,9].…”