Hydrothermal Syntheses, Crystal Structure and Characterization of Two Alkaline Earth Metal Coordination Polymers with 1-(4-Iodophenyl)-5-methyl-1H-[1,2,3]-triazole-4-carboxylate Ligand

Abstract

Two new alkaline earth metal coordination polymers [M(ipmtca)2(H2O)]n with M = Ca (1), Sr (2) have been obtained by the reactions of Ca2+ (1) and Sr2+ (2) with 1-(4-iodophenyl)-5-methyl-1H-[1,2,3]-triazole-4-carboxylic acid, respectively under hydrothermal conditions. The ligands link the metals to a 1D chain via carboxyl groups with μ 3-(η 2:η 0) and μ 3-(η 1:η 2) coordination modes. The complexes are assembled into a 3D structure by the 1D chains via hydrogen bonding interactions. The structures have been established by single-crystal X-ray diffraction, and characterized by FT-IR, thermogravimetric analysis (TGA), solid UV–Vis spectroscopy, and solid-state fluorescent spectroscopy. TGA analysis confirmed the thermal stability of the complexes.