Synthesis, Crystal Structure, Spectroscopic and Thermal Investigations of a Novel 2D Sodium(I) Coordination Polymer Based on 2-Aminoterephthalic Ligand

The reaction of sodium hydroxide with 2-aminoterephthalic acid leads to the formation of a complex of the general formula: [Na2(atpt)(H2O)5]·H2O, where atpt = [NH2C6H3(COO)2]2−. Sodium 2-aminoterephthalate was synthesized and characterized by single-crystal X-ray diffraction, FT-IR spectroscopy, thermal analysis and coupled TG–FT-IR technique. Crystallographic study of the sodium complex reveals that the compound crystallizes in the triclinic system, the space group P-1 with a = 7.983(3) A, b = 8.405(3) A, c = 11.311(5) A, α = 70.74(3)°, β = 76.57(3)°, γ = 83.12(3)° and V = 696.1(5) A3. On heating in air atmosphere the compound in question loses all water molecules in two steps in the temperature range 30–205 °C. The anhydrous form of the complex is stable up to 370 °C and then decomposes to sodium carbonate.