Synthesis, Structure, Spectral-Luminescent Properties, and Biological Activity of Chlorine-Substituted Azomethines and Their Zinc(II) Complexes

A number of chlorine-substituted azomethines of 2-hydroxybenzaldehydes and their zinc(II) complexes were synthesized. Structure of azomethines and zinc complexes was established by elemental analysis, IR, 1H NMR, and X-ray spectroscopy data. Complexes ZnL2 have a tetrahedral structure. The complexes exhibit weak photoluminescent properties in methylene chloride, whereas the photoluminescence quantum yields of the solid complexes are 100 times higher. Biological activity of the azomethines and zinc complexes was studied.