Unified calculations of the optical and electron paramagnetic resonance spectral data for Ce3+ ion in Y3Ga5O12 crystal

2011 ◽  
Vol 406 (23) ◽  
pp. 4429-4431 ◽  
Author(s):  
Ping Su ◽  
Wen-Chen Zheng
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Spectral Data ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

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 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.

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