The role of non-covalent interactions in the crystal structure of two new nano coordination polymers of Cd(II) and Hg(II) based on N,N′-Bis-pyridin-4-ylmethylene-naphthalene-1,5-diamine ligand

Abstract

Two new Hg(II) and Cd(II) one-dimensional coordination polymers have been constructed from metal iodide and a N, N′-Bis-pyridin-4-ylmethylene-naphthalene-1,5-diamine ligand using conventional methods. The effects of the ligand geometry and the coordination modes of iodide on the structures of the coordination polymers have been discussed in detail. In order to clarify the effect of experimental conditions on the morphology and size of [Cd(L)I2]n (1) and [Hg(L)I2]n particles, we have systematically investigated the influence of concentration and sonication power on the size of the resulting products for the aim of realizing controllable synthesis. The results indicated that the concentration and sonication power directly influenced the final size of nanostructures of these coordination polymers. The prepared nanocrystals of these two coordination polymers were analyzed using scanning electron microscopy, infrared spectroscopy and X-ray powder diffraction.