Synthesis, Characterisation and antibacterial studies of Oxovanadium complexes of Bidentate schiff bases

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Author: 
Gayathri, N. and Suresh, M.S.
Subject Area: 
Physical Sciences and Engineering
Abstract: 

Three vanadyl complexes of bidentate Schiff bases from vanillin with anthranilic acid (VA), 4-aminoantipyrine with vanillin (4AV) as well as 4-aminoantipyrine with furfural (4AF) have been synthesized and characterized using elemental analysis, FTIR, UV-Vis, ESR spectroscopic methods, magnetic susceptibility, molar conductivity measurements and thermal analysis. These complexes have the general molecular formula [VO (VA)2.H2O], which is found to be a non-electrolyte, while the others with general molecular formula [VO(L)2.(H2O)]SO4, where L= 4AV or 4AF were 1:1 electrolytes. The infra red spectra reveals the involvement of coordination of azomethine nitrogen and oxygen atom of carboxylate ion from VA to oxovanadium (IV) while azomethine nitrogen and oxygen atom from cyclic keto group present in pyrazoline ring are coordinated to VO (IV) from 4AV and 4AF. These complexes have a distorted octahedral geometry and yield V2O5 as a stable residue during thermal decomposition in static air atmosphere with loss of H2O molecule in the first step. These complexes have been screened for their antibacterial activity against organisms like E.Coli, S.aureus, Serattai SP, P.aeruginosa and B.Cereus.

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