Synthesis and characterization of lanthanide complex derived from tetradentate schiff base and ita??s antimicrobial activity

摘要

New metal complex of La(III) ion with a tetradentate Schiff base derived from salicylaldehyde and ethylenediamine have been investigated. The obtained C, H and N elemental analysis data showed the formation of 1:1 [M:L] ratio. The prepared complex revealed a electrolytic nature. The magnetic moment value of the complex exhibited the existence of diamagnetic phenomena. The coordination behavior of the metal ion towards to the investigated Schiff base takes place through –C=N and –OH groups. The electronic spectral data of the complex displayed the proper transitions and the expected geometrical structure. La(III) complex showed the presence of an octahedral structure and is supported by the data which obtained from the electronic transitions. The salen schiff base was studied for antimicrobial activities against Gram positive (E.Coli and staphylococcus aureus) and Gram negative (Aspergillus niger and Alternaria). The complex exhibited a variable activity of inhibition on the growth of the bacteria.