Spectroscopic, morphology and electrical conductivity studies on Co(II), Ni(II), Cu(II) and Mn(II)-oxaloyldihydrazone complexes

Ahmed, Ayman H.; Moustafa, Mohsen A.

doi:10.1016/j.jscs.2020.02.003

Cited by 15 publications

(12 citation statements)

References 24 publications

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“…So, the orientation and ionic contribution decreases, leading to decreasing ε 1 . 108 As the frequency is further increased, the dipole will be unable to follow the field completely, stopping the orientation and ionic polarization. Thus, ε 1 approaches approximately to a constant value at higher frequencies due to the interfacial contribution only.…”

Section: Resultsmentioning

confidence: 99%

Co(ii), Ni(ii), Cu(ii) and Cd(ii)-thiocarbonohydrazone complexes: spectroscopic, DFT, thermal, and electrical conductivity studies

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Co(ii), Ni(ii), Cu(ii) and Cd(ii)-thiocarbonohydrazone complexes: spectroscopic, DFT, thermal, and electrical conductivity studies

et al. 2021

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“…Dataset relating to the molecule's size can be supplied thanks to the TEM photographs. The surface morphology, the homogeneity, and the microstructure of the synthesized compounds 57,58 . Figure 4 lays out the ultra‐high TEM images of the metal chelates.…”

Section: Resultsmentioning

confidence: 99%

“…The XRD pattern of the inspected ligand and complexes of cobalt, copper, and thorium displayed an amorphous nature, where the zinc complex exhibits high crystallinity (2theta = 22.05, B (FWHM) = 1.75 and T (nm) = 4.97. The amorphous nature can be attributed to an uncommon configuration for the solid structures' quick precipitation process 58,61 . It is considered also the prevailing one if the precipitation process is speedy and/or rapid cooling of the reaction solution in order to isolate the solid product 62 .…”

Section: Resultsmentioning

confidence: 99%

“…62 In addition to that, many ingredients in the structure of the compound are not able to be revealed in a crystal lattice. 58 So that, they are precipitated fundamentally in the amorphous condition. This amorphous nature of the studied compounds may also indicate the infinitely small sizes of the aggregates which are in the nanoscopic range as audited through the TEM analysis.…”

Section: X-ray Powder Diffractionmentioning

confidence: 99%

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Synthesis, characterization, antimicrobial, molecular docking simulation, and antitumor assays of nanometric complexes based on new thiazole Schiff base derivative

Khedr,

El‐Ghamry,

Wahdan

et al. 2024

Applied Organom Chemis

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For further pharmaceutical applications, a novel Schiff base derivative of aminothiazole and its Co (II), Cu (II), Zn (II), and Th (IV) chelates were designed and prepared. For this purpose, 2‐aminothiazole and 2,4‐dihydroxybenzaldehyde have been coupled before the complexation reaction with the metal salts. Elemental analysis, FT‐IR, 1HNMR, UV–Vis spectra, transmission electron microscopy (TEM), X‐ray powder diffraction (XRD), molar conductance, and magnetic moment measurements were used to determine the structural formula of the ligand and its produced chelates. The acquired data pointed out that the ligand was chelated with metal through the nitrogen of azo group and deprotonated ortho phenolic oxygen atoms. In Cu (II) complex the copper ion chelated with two ligand molecules, whereas in other complexes the metal binds with one molecule only of ligand. It was shown by XRD patterns and high‐resolution TEM images that the complex particles had a uniform distribution across the chelates' surfaces and were nanometric in size. Extremely, antimicrobial and anticancer activity for the prepared ligand and complexes were investigated, which showed high activity, especially after complex formation. Docking studies have been performed to predict the compounds' efficacy as antitumor agents through their interaction with the co‐crystal structure of proteins for breast cancer cells (PDB ID: 3S7S) and protein of liver cancer 2 (PDB ID: 2JW2). The experimental results of the anticancer activity showed promising results, especially for Cu (II) compound which exhibited the greatest antitumor efficacy (IC50 = 12.81 μg/ml) contra HepG‐2 carcinoma and Mcf‐7 cells (IC50 = 18.92 ± 0.91 μg/ml). Antimicrobial activity against the strains Klebsiella pneumoniae (K. pneumoniae), Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), Bacillus subtilis (B. subtilis), C. albicans (C. albicans), and Aspergillus niger (A. niger) also gave very promising results when it is compared with the standard drugs.

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“…N,N -bis[2-hydroxynaphthylidene]amino]oxamide (HAO) was prepared using the same recipe published earlier [41][42][43]. By heating on a hot plate, ethanedihydrazide (0.02 mol) was allowed to dissolve in 80 mL distilled water, then 30 mL absolute ethanol was added.…”

Section: Isolation Of Nn-bis([2-hydroxynaphthylidene]amino)oxamidementioning

confidence: 99%

Impediment of Iron Corrosion by N,N′-Bis[2-hydroxynaphthylidene]amino]oxamide in 3.5% NaCl Solution

et al. 2021

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Hydrazone [N,N′-bis[2-hydroxynaphthylidene]amino]oxamide] derived from the condensation of ethanedihydrazide with 2-hydroxynaphthalene-1-carbaldehyde was synthesized and assessed on the basis of elemental analysis (CHN) and spectral (IR, mass, 13C/1H NMR and UV-Vis) measurements. The influence of N,N-bis([2-hydroxynaphthylidene]amino)oxamide (HAO) in terms of the inhibition of iron corrosion in concentrated sodium chloride solution (3.5 wt.% NaCl) after various exposure periods was assessed. Numerous electrochemical and spectroscopic assessment techniques were performed. Cyclic potentiodynamic polarization experiments indicated that the presence of HAO and its increased concentration decreased the corrosion of iron in NaCl solution by decreasing the corrosion values, anodic and cathodic currents, and corrosion rate. The electrochemical impedance spectroscopy results showed that HAO molecules greatly increased the corrosion resistance. The chronoamperometric experiments performed at −475 mV (Ag/AgCl) revealed that the HAO molecules decreased the absolute currents and reduced the probability of the occurrence of pitting corrosion. The effect of HAO on the inhibition of iron corrosion was also confirmed through scanning electron microscopy micrographs and energy-dispersive X-ray profile analyses, which proved that the surface of the iron sample exposed to chloride solution alone was pitted, while the presence of HAO molecules reduced the severity of the pitting corrosion. The results confirmed that the presence of HAO molecules inhibits the corrosion of iron and this impact increased when the exposure time was increased to 48 h.

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Spectroscopic, morphology and electrical conductivity studies on Co(II), Ni(II), Cu(II) and Mn(II)-oxaloyldihydrazone complexes

Cited by 15 publications

References 24 publications

Co(ii), Ni(ii), Cu(ii) and Cd(ii)-thiocarbonohydrazone complexes: spectroscopic, DFT, thermal, and electrical conductivity studies

Co(ii), Ni(ii), Cu(ii) and Cd(ii)-thiocarbonohydrazone complexes: spectroscopic, DFT, thermal, and electrical conductivity studies

Synthesis, characterization, antimicrobial, molecular docking simulation, and antitumor assays of nanometric complexes based on new thiazole Schiff base derivative

Impediment of Iron Corrosion by N,N′-Bis[2-hydroxynaphthylidene]amino]oxamide in 3.5% NaCl Solution

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