Synthesis, Characterization and Spectroscopic Properties of Two New Azo Ligands Containing Salicyaldimine-based Ligand as Side Chains

Azo ligands containing salicyaldimine-based ligand as side chains can be used in the production of chemical sensors because they show a significant change of color of the solution and maxima of the absorption band when they interact with transition metal ions or anions [1-3]. Therefore among the wide range of materials that may be suitable for the electronic and optical applications, salicyaldimine-based ligands are of particular interest. In this work, two new azo Schiff-bases I and II were prepared from 1-(3-formyl-4- hydroxophenylazobenzene) and 4-nitro-1,2-phenylenediamine or 4-chloro-1,2- diaminobenzene in methanol solution. Two compounds were characterized with FT-IR, 1 H NMR and elemental analysis techniques. Also, optical properties of these compounds were investigated by UV-vis spectroscopy in the presence of some metal ion transitions.