Synthesis, spectroscopic, coordination and biological activities of some transition metal complexes containing ONO tridentate Schiff base ligand

2015 ◽  
Vol 149 ◽  
pp. 771-787 ◽  
Author(s):  
A.A.M. Belal ◽  
I.M. El-Deen ◽  
N.Y. Farid ◽  
Rosan Zakaria ◽  
Moamen S. Refat
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Schiff Base Ligand ◽  
Biological Activities ◽  
Tridentate Schiff Base

scholarly journals Synthesis and Spectral Studies of 4,4′-(Hydrazine-1,2-diylidenedimethylylidene)-bis-(2- methoxyphenol) and Its Transition Metal Complexes with Promising Biological Activities

2020 ◽  
Vol 32 (7) ◽  
pp. 1768-1772
Author(s):  
Anita Rani ◽  
Manoj Kumar ◽  
Hardeep Singh Tuli ◽  
Zahoor Abbas ◽  
Vinit Prakash
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Schiff Base Ligand ◽  
Biological Activities ◽  
Condensation Reaction ◽  
Analytical Techniques ◽  
Spectral Studies

The study describes the synthesis, characterization and biological activity of a novel Schiff base ligand and its transition metal complexes. The Schiff base ligand was obtained by a condensation reaction between 4-hydroxy-3-methoxybenzaldehyde (p-vanillin) and hydrazine hydrate using ethanol as solvent. A new series of Ni(II) and Fe(III) complexes were also derived by reaction of prepared Schiff base ligand with NiCl2 and FeCl3. Both the ligand and its metal complexes were characterized by solubility, melting point and elemental analysis. These compounds were further identified by analytical techniques, FTIR, NMR and mass spectrometry. The ligand and its transition metal complexes were also subjected to in vitro biological activities i.e. antimicrobial, antiangiogenic and DNA photo cleavage. For antimicrobial activity compounds were tested against two strains of bacteria and two strains of fungi. Different concentrations of prepared compounds were treated with fertilized chicken eggs and plasmid DNA to find out antiangiogenic and DNA photocleavage activity, respectively.

scholarly journals Synthesis and Spectral Investigations of Polymeric Hydrazone Schiff Base and its Transition Metal Complexes with Promising Antimicrobial, Anti-Angeogenic and DNA Photo-Cleavage Activities

2019 ◽  
Vol 31 (10) ◽  
pp. 2331-2336 ◽  
Author(s):  
Manoj Kumar ◽  
Anita Rani ◽  
Hardeep Singh Tuli ◽  
Rajshree Khare ◽  
Vinit Parkash
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Schiff Base Ligand ◽  
Biological Activities ◽  
Free Ligand ◽  
Ft Ir ◽  
Bacteria And Fungi

This report describes the synthesis and exploration of novel Schiff base ligand in the form of a polymer (heptamer) which was prepared by reaction between 3,4-diacetyl-2,5-hexanedione and hydrazine hydrate in ethanol. On further reaction of Schiff base with transition metals ions (Co and Cu) leads to formation of its transition metal complexes. The structural identification of Schiff base ligand and its transition metal complexes were characterized by classical structural techniques like FT-IR, NMR and mass spectra. The free ligand and its transition metal complexes have been screened for in vitro biological activities against various strains of bacteria and fungi. The prepared Schiff base and its metal complexes were also screened for antiangiogenic activity. The results have shown the remarkable antimicrobial and antiangiogenic activities of the Schiff base and its metal complexes.

scholarly journals Solvent-free Synthesis, Characterization and Biological Activity of Transition Metal Complexes of Schiff Base Ligand Derived from 2-Amino Benzimidazole with 4, 4’Dibromobenzil

2021 ◽  
Vol 11 (3) ◽  
pp. 3834-3842
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Schiff Base Ligand ◽  
Biological Activities ◽  
Bacterial Species ◽  
Salmonella Typhi ◽  
Microwave Assisted Synthesis ◽  
Complexes Of Transition Metals

Microwave-assisted synthesis and characterization of Schiff base ligand complexes of transition metals such as Mn(II), Fe(III), Co(II), Ni(II),Cu(II), Zn(II) Cd(II), and Ag(I) (using Schiff base) prepared by irradiation of 2-Amino benzimidazole with 4,4’dibromo benzil. The Synthesized transition metal complexes and Schiff base ligand have been representatively characterized by elemental analysis and spectral methods such as UV, IR, 1H-NMR, LC-MS, and Thermal analysis. The synthesized ligand and its complexes were also screened for their biological activities, such as antibacterial activity against bacterial species Staphylococcus aureus, Escherichia coli, and Salmonella Typhi. The result indicated that the complexes exhibited octahedral geometry.

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