PHYSICOCHEMICAL CHARACTERIZATION OF NOVEL UREA–ORGANIC AMINE SUPRAMOLECULAR COMPLEXES

The development of supramolecular complexes based on urea and organic amines has attracted increasing attention due to their unique physicochemical properties and promising applications in agriculture, materials science, and chemical technology. In this study, novel urea–organic amine supramolecular complexes were synthesized and comprehensively characterized using complementary physicochemical techniques. The synthesized complexes were investigated by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and measurements of density, refractive index, viscosity, and aqueous solubility. The obtained results confirmed the formation of stable supramolecular structures through hydrogen bonding and intermolecular interactions between urea and organic amines. The complexes exhibited improved thermal stability, enhanced physicochemical characteristics, and favorable solubility behavior compared with the individual starting components. These findings demonstrate that the prepared supramolecular complexes possess significant potential as functional materials for agricultural and industrial applications. The developed approach provides valuable insights into the relationship between molecular structure and physicochemical properties, contributing to the rational design of advanced urea-based supramolecular systems.