Spectroscopic and biological activity studies on tridentate Schiff base ligands and their transition metal complexes

El‐Halim, Hanan F. Abd; Omar, M. M.; Mohamed, Gehad G.; Sayed, Mohsen A.

doi:10.5155/eurjchem.2.2.178-188.240

Cited by 45 publications

(27 citation statements)

References 33 publications

(48 reference statements)

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“…1,4 However, as a society we are increasingly aware of the environmental impact of human activity, and consequently of the need to develop cleaner and more energy-efficient technologies. It has long been recognized that the large-scale use of volatile organic solvents resulted in serious environmental contamination.…”

Section: Introductionmentioning

confidence: 99%

“…Currently most protocols for the synthesis of Schiff-bases are looking for optimization on reaction temperature, 4 reaction time, 4,5 etc., the protocols being environmentally stressful because of extensive use of volatile organic solvents. 1,4 However, as a society we are increasingly aware of the environmental impact of human activity, and consequently of the need to develop cleaner and more energy-efficient technologies.…”

Section: Introductionmentioning

confidence: 99%

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Solvent-free mechanochemical conversion of 3-ethoxysalicylaldehyde and primary aromatic amines to corresponding Schiff-bases

2015

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solvent-free mechanochemical conversion of 3-ethoxysalicylaldehyde and primary aromatic amines to corresponding Schiff-bases

2015

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“…New bands are found in the spectra of complexes in the regions 528-530 and 419-450 cm -1 which are assigned to ν(M-O) and ν(M-N) stretching vibrations [40], respectively. Therefore, from the IR spectra it is concluded that PHR coordinated to the Fe(III) ions in a bidentate neutral manner via the two pyridyl N atoms, while EBT coordinated via the azo N and two protonated phenolic O atoms.…”

Section: Infrared Spectra and Nature Of Coordinationmentioning

confidence: 94%

Synthesis, spectroscopic and thermal characterization of Fe(III)-mixed ligand complexes and spectrophotometric determination of Fe(III) in various samples

Mohamed

Hindy²,

Rizk

et al. 2014

Eur. J. Chem.

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KEYWORDSThe aim of the present study is to find a non time consuming, economical and reliable spectrophotometric procedures using commercially available spectrophotometric reagents for the determination of Fe(III) ions. The methods are based on the formation of colored ternary complexes using, 1,10-phenanthroline and eriochrome black T or tartrazine mixed reagents and improved using a cationic surfactant, cetyltrimethyl ammonium bromide. This surfactant interacts with the complex to build up true ternary complex. The most suitable conditions for determination of Fe(III) ions and the parameters affecting the reactions including pH, time, temperature, stoichiometric ratios and reagents concentrations are optimized. The effect of different interfering ions is studied together with the suitable masking agents. The developed methods are used for the determination of Fe(III) ions in the presence of cetyltrimethyl ammonium bromide in different types of water (polluted industrial waste, ground, river Nile and drinking water). The synthesis and spectroscopy studies of two Fe complexes were reported. Thermal analysis was carried out in order to give an idea about the thermal stability of the complexes.

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“…The amoxicillin−based Schiff base and its metal complexes were tested for antibacterial activity against pathogenic bacteria G(+) Staphylococcus aureus ATCC 25923 and G(−) Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 700603, Pseudomonas aeruginosa ATCC 27853, Staphilococcus epidermidis ATCC 14990 by using the paper disc diffusion method measuring the growth inhibition zone after 24 h incubation . The chosen strains were collected from Microbiology Laboratory of the Department of Biological Sciences, UDO University.…”

Section: Methodsmentioning

confidence: 99%

Antibacterial activity of transition metal complexes with a tridentate NNO amoxicillin derived Schiff base. Synthesis and characterization

Anacona

Mago

Camús

2018

Applied Organom Chemis

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From the reaction of amoxicillin (1) antibiotic with 2,6−diaminopyridine (2) an amoxicillin−based Schiff base (HL) (3) was obtained and its transition metal Schiff base complexes were synthesized. Spectroscopic and physicochemical techniques, namely, UV−Vis, FT−IR, 1H−NMR, EPR, mass spectrometry, molar conductance, magnetic susceptibility, molecular modelling, together with elemental and thermal analyses, were used to characterize the synthesized compounds. Spectral and magnetic data suggested an octahedral geometry for all the complexes and the general formulae [ML(H2O)3][PF6] (M(II) = Mn2+ (4), Co2+ (5), Ni2+ (6), Cu2+ (7), Zn2+ (8), was proposed for them, where L represents deprotonated tridentate NNO amoxycillin−derived Schiff base. All compounds were screened for antibacterial activity by using agar disc diffusion method. The zinc(II) complex exhibited promising bactericidal activity against E. coli and S. aureus.

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Spectroscopic and biological activity studies on tridentate Schiff base ligands and their transition metal complexes

Cited by 45 publications

References 33 publications

Solvent-free mechanochemical conversion of 3-ethoxysalicylaldehyde and primary aromatic amines to corresponding Schiff-bases

Solvent-free mechanochemical conversion of 3-ethoxysalicylaldehyde and primary aromatic amines to corresponding Schiff-bases

Synthesis, spectroscopic and thermal characterization of Fe(III)-mixed ligand complexes and spectrophotometric determination of Fe(III) in various samples

Antibacterial activity of transition metal complexes with a tridentate NNO amoxicillin derived Schiff base. Synthesis and characterization

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