Synthesis, characterization, theoretical study and biological activity of Schiff base nanomaterial analogues

Autor: S.Y. Abbas, Walaa H. Mahmoud, Adel Z. El-Sonbati, M.A. Diab, Gehad G. Mohamed
Rok vydání: 2019
Předmět:
Zdroj: Journal of Molecular Structure. 1181:645-659
ISSN: 0022-2860
DOI: 10.1016/j.molstruc.2019.01.007
Popis: The ligand named (H2L: 2,2'-((1E, 1′E)-(1,3 phenylene bis (azanylylidene)) bis (methanylylidene))diphenol) was prepared from the reaction of m-phenylenediamine and 2-hydroxybenzaldehyde. A series of Co(II), Ni(II), Cu(II), Cr(III), Mn(II), Fe(III), Zn(II) and Cd(II) complexes of the ligand were prepared and characterized using different physicochemical techniques. The infrared spectral data showed that the chelation occurs through the deprotonated phenolic oxygen and azomethine nitrogen atoms of the ligand. The data showed that the complexes have composition of ML type. An octahedral geometry around the central metal ions in the complexes was suggested. The molecular structures of the ligand and its metal complexes were optimized theoretically. Scanning electron microscope micrographs proved that the ligand and its Co(II) and Cd(II) complexes were formed in nano size. The synthesized Schiff base ligand and its complexes have been screened for antimicrobial activities against bacterial species and fungi. A comparative study of the inhibition zones of the ligand and its metal complexes indicates that most complexes exhibit higher antibacterial and antifungal effect against bacterial species than the free ligand. The molecular docking is used to predict the efficiency of binding between Schiff base ligand and both receptors of crystal structure of Escherichia coli (3T88) and crystal structure of Staphylococcus aureus (3Q8U).
Databáze: OpenAIRE
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