scholarly journals Preparation, Characterization and Antibacterial Activity of Some Metal ion Complexes

2007 ◽  
Vol 4 (4) ◽  
pp. 461-466 ◽  
Author(s):  
M. M. El-Ajaily ◽  
F. A. Abdlseed ◽  
S. Ben-Gweirif
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Antibacterial Activity ◽  
Schiff Base ◽  
Thermogravimetric Analysis ◽  
Elemental Analysis ◽  
Geometrical Structure ◽  
Analysis Data ◽  
Molar Conductance ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

The Schiff base complexes derived from Salicylaldehyde and o- pheneylenediamine have been prepared and characterized using several physical techniques, in terms; elemental analysis, molar conductance measurements, thermogravimetric analysis, magnetic moment measurements, infrared, electronic and electron paramagnetic resonance spectra. The elemental analysis data exhibit the formation of 1:1[M: L] complexes. The molar conductance values reveal a non- electrolytic nature. The thermogravimetric analysis data of Cr(VI) complex show the presence of water molecules. The obtained magnetic moment values exhibit the existence of three unpaired electrons in the Cr(III) complex and a diamagnetic phenomenon for the other three complexes. The infrared spectral data display the coordination behavior of the Schiff base towards Cr(VI), Cr(III), Pb(II)) and TiO(IV) ions. The electronic absorption spectra of the Schiff base and its complexes show π→π* (phenyl ring), n→π* (HC=N) and the expected geometrical structure for the prepared complexes. The electron paramagnetic resonance spectral data satisfy the presence of a paramagnetic phenomenon and support the expected geometrical structure of Cr(III) complex. The Schiff base and its new complexes were tested for antibacterial activity against gram positive bacteria; Staphylococcus aureus and gram negative bacteria; Salmonella, Escherichia coli including the resistance bacteria Pseudomonas aeruginosa.

scholarly journals Preparation, Investigation and the Study of the Effect of Mn(II) Complex of Catechol and 2-Aminopyridine on Seed Germination

2011 ◽  
Vol 8 (1) ◽  
pp. 19-24
Author(s):  
F. I. El-Moshaty ◽  
R. S. El-Zweay ◽  
M. M. El-Ajaily ◽  
A. M. Jerboa
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Thermogravimetric Analysis ◽  
Seed Germination ◽  
Spectral Data ◽  
Root Length ◽  
Analysis Data ◽  
Molar Conductance ◽  
Conductance Measurement ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

The formation of mixed ligand complex of Mn(II) with catechol (L1) and 2-aminopyridine (L2) was determined by elemental analyses (C, H and N), molar conductance measurement, thermogravimetric analysis, infrared, electronic and electron paramagnetic resonance spectroscopies. The elemental analysis data show the formation of 1:1:1 [M: L1: L2] complex. The molar conductance measurement shows a non-electrolyte nature. The thermogravimetric analysis data of the complex display the existence of hydrated and coordinated water molecules. The infrared spectral data exhibit the coordination sites that are through -OH,-C=N and –NH2groups. The electronic spectral data display the electronic transitions of the ligands and suggest an octahedral structure for the complex. The electron paramagnetic resonance spectrum of the complex reveals the existence of paramagnetic phenomena and supports its geometrical structure. Seed germination and root length of grass were also assayed under the effect of MnCl2.4H2O, catechol, 2-aminopyridine and its complex. Mn(II) salt was the most effective on germination than its complex which possess the high test effect on root length, while the ligands are the least active of all.

scholarly journals Preparation and Antibacterial Activity of Mixed Ligand Complexes of Co(II), Ni(II), Cu(II) and Cd(II) Derived from 1-Phenylazo-2-naphthol and Salicylaldehyde

2011 ◽  
Vol 8 (1) ◽  
pp. 43-48
Author(s):  
S. A. I. Sharif ◽  
A. N. El-Tajoury ◽  
A. A. Elamari
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Antibacterial Activity ◽  
Spectral Data ◽  
Electronic Absorption ◽  
Molar Conductance ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Central Metal ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

The mixed ligand complexes of Co(II), Ni(II), Cu(II) and Cd(II) have been synthesized by using 1-phenylazo-2-naphthol as primary ligand and salicylaldehyde as secondary ligand. All the prepared complexes were identified and confirmed by elemental analyses (C, H and N), molar conductance measurements, infrared, electronic absorption and electron paramagnetic resonance. The elemental analysis data suggest that the stoichiometry of the complexes to be 1:1:1[M: L1: L2] ratio. The molar conductance measurements of the complexes indicate their non-electrolytic nature. The infrared spectral data showed the coordination sites of the free ligand with the central metal ion. The electronic absorption spectral data revealed the existence of an octahedral geometry for Co(II) and Cd(II) complexes and a square planar geometry for Ni(II) and Cu(II) complexes. The electron paramagnetic resonance spectra of the Co(II) and Cu(II) complexes showed the existence a paramagnetic phenomenon and supported their geometrical structures which confirmed by the electronic absorption spectra. The ligands and mixed ligand complexes have been tested on antibacterial activity against three strains of pathogenic bacteria such asEscherichia coli, Staphylococcus aureusandPseudomonas aeruginosa

scholarly journals Synthesis, Characterization and Antibacterial Activity of Schiff Base, 4-Chloro-2-{(E)-[(4-Fluorophenyl)imino]methyl}phenol Metal (II) Complexes

2020 ◽  
Vol 2020 ◽  
pp. 1-8 ◽  
Author(s):  
F. K. Ommenya ◽  
E. A. Nyawade ◽  
D. M. Andala ◽  
J. Kinyua
Keyword(s):  
Antibacterial Activity ◽  
Schiff Base ◽  
Metal Complexes ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Condensation Reaction ◽  
Molar Conductance ◽  
Diffusion Method ◽  
Elemental Analysis Data ◽  
Ft Ir

A new series of Mn (II), Co (II), Ni (II), Cu (II), and Zn (II) complexes of the Schiff base ligand, 4-chloro-2-{(E)-[(4-fluorophenyl)imino]methyl}phenol (C13H9ClFNO), was synthesized in a methanolic medium. The Schiff base was derived from the condensation reaction of 5-chlorosalicylaldehyde and 4-fluoroaniline at room temperature. Elemental analysis, FT-IR, UV-Vis, and NMR spectral data, molar conductance measurements, and melting points were used to characterize the Schiff base and the metal complexes. From the elemental analysis data, the metal complexes formed had the general formulae [M(L)2(H2O)2], where L = Schiff base ligand (C13H9ClFNO) and M = Mn, Co, Ni, Cu, and Zn. On the basis of FT-IR, electronic spectra, and NMR data, “O” and “N” donor atoms of the Schiff base ligand participated in coordination with the metal (II) ions, and thus, a six coordinated octahedral geometry for all these complexes was proposed. Molar conductance studies on the complexes indicated they were nonelectrolytic in nature. The Schiff base ligand and its metal (II) complexes were tested in vitro to evaluate their bactericidal activity against Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa) and Gram-positive bacteria (Bacillus subtilis and Staphylococcus typhi) using the disc diffusion method. The antibacterial evaluation results revealed that the metal (II) complexes exhibited higher antibacterial activity than the free Schiff base ligand.

Heterometallic CoIII4FeIII2 Schiff Base Complex: Structure, Electron Paramagnetic Resonance, and Alkane Oxidation Catalytic Activity

2012 ◽  
Vol 51 (16) ◽  
pp. 9110-9122 ◽  
Author(s):  
Dmytro S. Nesterov ◽  
Eduard N. Chygorin ◽  
Volodymyr N. Kokozay ◽  
Volodymyr V. Bon ◽  
Roman Boča ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Schiff Base ◽  
Catalytic Activity ◽  
Complex Structure ◽  
Schiff Base Complex ◽  
Alkane Oxidation ◽  
Paramagnetic Resonance ◽  
Base Complex ◽  
Electron Paramagnetic

scholarly journals Structural Investigation and Antibacterial Activity of Cu(II), Co(II), Ni(II) and Zn(II) Complexes of a Schiff Base Derived from Salicylaldehyde and Thiosemicarbazide

2020 ◽  
pp. 39-48
Author(s):  
Tuly Paul ◽  
Md. Faruk Hossen ◽  
Md. Kudrat-E- Zahan ◽  
Md. Masuqul Haque ◽  
Rausan Zamir ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Schiff Base ◽  
Elemental Analysis ◽  
Structural Investigation ◽  
Molar Conductance ◽  
Gram Negative ◽  
Escherichia Coli Bacteria ◽  
Physicochemical Data ◽  
Donor System

The metal (II) complexes, Na2[ML2] [M = Cu, Co, Ni, and Zn], of salicylaldehyde thiosemicarbazone (L) containing a trifunctional ONS-donor system have been synthesized and characterized on the basis of physicochemical data by elemental analysis, magnetic moment, molar conductance, and spectroscopic (electronic, IR and ESI-MS). The ligand functions as ONS tridentates producing octahedral complexes. All compounds showed significant antibacterial activity in different ranges against gram positive (Bacillus subtillus) and gram negative (Escherichia coli) bacteria.

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