Complexes of VO3+ with Dibasic Tetradentate Schiff Bases and their Microbial Studies
[1]
Mohammad Nasir Uddin, Department of Chemistry, University of Chittagong, Chittagong-4331, Bangladesh.
[2]
Md. Abdus Salam, Department of Chemistry, University of Chittagong, Chittagong-4331, Bangladesh.
[3]
Md. Abu Bakar Siddique, Department of Chemistry, University of Chittagong, Chittagong-4331, Bangladesh.
Tetradentate Schiff base ligands (L), which were derived from the condensation of ethylenediamine with salicylaldehyde [Bis(5-bromosalicylaldehyde)ethylenediamine, bis(2-hydroxyacetophenone) ethylenediamine, Bis (benzoylacetone) ethylenediamine, Bis(2-hydroxy-1-napthaldehyde) ethylenediamine] and their complexes of VO3+ were synthesized and characterized by some physico-chemical studies; elemental, spectral (IR, UV, NMR), magnetic and conductance analyses. The elemental analysis data showed the formation of 1:1 [M:L] complexes. The obtained molar conductance values revealed their non- electrolytic nature. The results of magnetic measurements supported diamagnetic phenomenon for the complexes. The infrared spectral data displayed the main coordination sites of ligands towards VO3+ions. The electronic spectral results of the complexes showed π→π* (phenyl ring), n→π* (HC=N), CT transition. Based on analytical data octahedral geometry for the prepared complexes has been proposed. The antibacterial activity of the prepared complexes was also studied against some gram positive and gram negative bacteria, and a number of fungi. It is found that complexes are quite effective against tested bacteria whereas moderately effective to mycelia growth of the selected fungi.
Tetradentate Schiff Base, Ethylenediamine and Ortho-Phenylenediamine, Antibacterial Activity, Octahedral Geometry
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