New aminoacid -schiff bases and Ni(II) complexes synthesis, characterization and evaluation of biological activity

In this study, by using 5- Floro- Salisilaldehyde and 5- Floro 3- Chloride Salisilaldehyde with D-glycine and D-alanine, Schiff bases and their Ni(II) complexes were prepared.Characterization and biological activities were evaluated. The structure and element analysis of Schiff bases and Ni (II) complexes are lightened by using FTIR, 1H-NMR, 13C-NMR and UV- GB spectras. In the all complexes, the Schiff bases act as three dentate chelate connecting to Ni(II) ion from imine nitrogen, carbonyl oxygen and hydroxyl oxygen. The result of it, Ni(II): L ratio 1:1 was foreseen. Schiff base complexes prepared by 5 - Floro - Salisilaldehyde were foreseen square planar structure. The biological activities of amino acid - Schiff bases and their Ni(II) complexes were evaluated against Staphylococcus aureus (RSKK-07035), Escherichia coli (ATCC-1230), Salmonella typhi H (NCTC- 901.8394), Brucella abortus (RSKK-03026), Micrococcus luteus, Listeria monocytogenes 4b (ATCC 19115), Staphylococcus epidermidis, Sh.dys. typ 10 and Candida albicans (Y-1200-NIH) used as a yeast, TokyoScience code: 201.1.005Key Words: Schiff bases, Aminoacid, Ni(II) complexes, BiologicalactivitiesNumber of pages: 62Supervisor: Assoc. Prof. Dr. Nurşen SARI