Synthesis, Characterization and photoluminescence studies of A New Schiff Base Ligand Containing 2-Thiophenecarboxaldehyde and Its Zirconium(IV) Complex

Schiff bases are an important class of organic compounds. This kind of ligands have significant importance in chemistry, especially in the development of Schiff base complexes [1]. Schiff bases with sulfur and nitrogen donor atoms in their structures act as good chelating agents [2]. Coordination of such compounds with metal ions often enhance their biological activities. Schiff base complexes have been of interest in coordination chemistry for many years due to their facile synthesis and wide applications. In this research, we reported synthesis and characterization of a new Schiff base ligand containing 2-thiophenecarboxaldehyde and 2-aminoethanethiol. This ligand was synthesized in methanol at 60 ºC. Also, zirconium(IV) complex was synthesized by the reaction of ligand and zirconium chloride in 1:1 molar ratio. The compounds were characterized by different spectroscopies and elemental analysis. The most important peaks in FT-IR spectra are due to the imine group at 1630 and 1617 cm-1 for Schiff base ligand (Fig. 1) and its complex, respectively. Furthermore, in 1H NMR the hydrogen of imine group were appeared at 8.47 and 8.40 ppm for the ligand and its complex