Mn(II) and Co(II) complexes of an ionic liquid-based Schiff base,
1-{2-(2-hydroxybenzylideneamino)ethyl}-3-methylimidazolium bromide, were
synthesized and characterized by various analytical and spectroscopic methods
such as elemental analysis, UV-Visible, FT-IR, 1H NMR, ESI-MS and magnetic
susceptibility measurement. These studies indicated tetrahedral geometry for
the complexes. The Schiff base ligand and its complexes were tested for in
vitro antibacterial activities to assess their inhibiting potentials against
Escherichia coli and Lactobacillus sp.
Co(II), Ni(II) and Cu(II) complexes of an ionic liquid-supported Schiff base 1-{2-[(2-hydroxy-5bromobenzylidene)amino]ethyl}-3-ethylimidazolium tetrafluoroborate were synthesized and characterized by various analytical and spectroscopic methods such as elemental analysis, UV-Visible, FT-IR, 1 H NMR, ESI MS, molar conductance and magnetic susceptibility measurements. Based on the spectral studies, tetra coordinated geometry was proposed for the complexes and molar conductance of the complexes revealed their electrolytic nature. The synthesized Schiff base and its complexes were evaluated for in vitro antibacterial activities against Gram positive and Gram negative bacteria. The complexes along with the Schiff base showed very significant biological activity against the tested bacteria.
Two Cu(II) complexes of an ionic liquid based Schiff base
1-{2-(2-hydroxybenzylideneamino) ethyl}-3-methylimidazolium
hexaflurophosphate, were prepared and characterized by different analytical
and spectroscopic methods such as elemental analysis, magnetic
susceptibility, UV-Vis, IR, NMR and mass spectroscopy. The Schiff base ligand
was found to act as a potential bidentate chelating ligand with N, O donor
sites and formed 1:2 metal chelates with Cu(II) salts. The synthesized Cu(II)
complexes were tested for biological activity.
New Co(II), Ni(II) and Cu(II) metal complexes from an imidazolium ionic liquid supported Schiff base, 1-{2-(2-hydroxy-5-nitrobenzylideneamino)ethyl}-3-ethylimidazolium tetrafluoroborate were synthesized and characterized by different analytical and spectroscopic techniques such as elemental analysis (CHN analysis), UV-Visible, 1 H NMR, 13 C NMR, FT-IR, powder X-ray diffraction, mass-spectra, magnetic susceptibility measurements and molar conductance data. From these spectroscopic and analytical data, tetra coordinated 1:2 metal-ligand stoichiometry was suggested for the metal complexes. The molar conductance data of the complexes revealed their electrolytic nature (1:2). The synthesized complexes along with the ligand were screened for in vitro antibacterial applications against Gram-negative and Gram-positive bacteria to assess their inhibition potentials. The complexes were proved very effective against the tested organisms.
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