Investigation of thermal and magnetic properties of [MSalen/Saloph] (M = Cr3+, Fe3+ or Co3+) capped dinuclear complexes of two novel tetraoxocalix[2]arene[2]triazine ligands

Abstract

In this study, tetraoxocalix[2]arene[2]triazine compound as starting compound codded as C1 was synthesized by reacting of 2,4,6-trichloro-1,3,5-triazine with methyl-3,5-dihydroxybenzoate in two stages. s-Triazine bridged calixarene ligands as target ligands, which we coded as C2 and C3, were obtained from the reaction of C1 coded compound with 4-aminobenzoic acid or 4-hydroxybenzoic acid at 1:2 mole ratio, respectively. [MSalen/Saloph] capped benzoic acid substitute tetraoksocalix[2] aren[2]triazine complexes were obtained from the reaction of C2 or C3 codded ligand with [(MSalen/Saloph)2O] (M=Cr3+, Fe3+ and Co3+) starting complexes in 1,4-dioxane media. The ligands obtained were characterized by using 1HNMR , FT-IR spectroscopy and elemental analysis techniques. The complexes obtained were characterized by using FT-IR, UV–vis spectroscopies, elemental analysis, magnetic susceptibility, and TGA-DTA techniques. Metal contents of the complexes were determined by using ICP-OES spectroscopy.