Design and study of the physical properties of new magnetic and/or luminescent molecular materials

Abstract

This thesis explores multifunctional materials based on 1,2,4-triazole-derived Schiff base ligands and their transition metal complexes, with a particular focus on corrosion inhibition and magnetic properties. Notably, the synthesized ligands exhibited remarkable corrosion inhibition for XC48 CS in acidic media, achieving efficiencies up to 80.00%. To understand this behavior, structure-property relationships were elucidated, highlighting the importance of molecular design in achieving effective protection. Furthermore, a series of novel mono- and binuclear complexes,along with coordination polymers, were synthesized using Cu(II), Co(II), Ni(II), and Fe(II) ions. Detailed structural insights into these complexes were obtained through X-ray diffraction studies. Importantly, magnetic studies revealed a diverse range of behaviors, including antiferromagnetism, slow magnetic relaxation characteristic of SMM behavior,and SCO. Moreover, DFT calculations supported the experimental findings, providing further insight into the electronic structure and reactivity of these compounds.