Cover Image

Zoubi, Wail Al; Kim, Min Jun; Al‐Hamdani, Abbas Ali Salih; Kim, Yang Gon; Ko, Young Gun

doi:10.1002/aoc.5322

Cited by 23 publications

(38 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FT-IR spectra show that the stretching frequency of azomethine group (νC═N) shifts to 1610-1630 cm −1 in the spectra of metal complexes when compared to the Schiff base at 1662-1635 cm −1 (Figure 3). [18] This result indicates the coordination of nitrogen atoms to metal ions. [19] The peaks at approximately 507-572 cm −1 are assigned to ν(M─N).…”

Section: Ft-ir Spectra Of Schiff Base and Its Complexesmentioning

confidence: 89%

“…[3] For instance, transition metal complexes of Schiff bases exhibited a noteworthy role in numerous biological systems with redox-active processes, [4] such as copper proteins, which participate in oxygen transport, and the enzymes have been described. [5] The preparation models of Schiff complexes having similar spectroscopic properties are a most important tool to deeply understand the chemical structure and performance of these biological systems. Schiff base complexes have attracted remarkable attention and have a significant role in the growth of the coordination chemistry of metal-chelating systems [6] due to N 2 O 2 tetradentate ligands.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we have reported the biological importance of various heteroatom-based Schiff bases and their metal complexes. [16] A review of Schiff bases and their antimicrobial activities elaborated the importance of this functional group in medicinal chemistry. Spectroscopically active metal centers with steady, inert and nontoxic nature are very valuable in biological systems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phosphorus Schiff base ligand and its complexes: Experimental and theoretical investigations

Suleman

Al‐Hamdani

Ahmed

et al. 2020

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

A phosphorus‐containing Schiff base was prepared from bis{3‐[2‐(4‐amino‐1,5‐dimethyl‐2‐phenylpyrazol‐3‐ylideneamino)ethyl]indol‐1‐ylmethyl}phosphinic acid and paraformaldehyde as a novel antibacterial compound. The reaction of the Schiff base ligand with VO(IV), Ni(II), Co(II), Cu(II), Zn(II), Cd(II), Hg(II), Pd(II) and Pt(IV) led to binuclear species of metal complexes, depending on the ratio of metal ion and ligand. The ligand and its complexes were investigated using elemental analysis, Fourier transform infrared, 1H NMR, 13C NMR, UV–visible and mass spectra, thermogravimetric analysis, conductivity measurements and thermal analysis. The results showed that the Schiff base behaves as a tetradentate ligand; moreover, on the basis of conductance results, of all the prepared complexes are non‐electrolytes, excepting the Pt(IV) complex. The metal complexes were found to be formed with a metal‐to‐ligand ratio of 2:1, except for the Pt(IV) complex with a ratio of 1:1. The activation thermodynamic parameters (ΔE*, ΔH*, ΔS*, ΔG* and K) and the activation energy of thermal decomposition were determined from thermogravimetric analysis using the Coats–Redfern method. The biological activities of the metal complexes were screened against the growth of bacteria and fungi in vitro to assess the antimicrobial potential and study the toxicity of the compounds. The prepared compounds have noteworthy antimicrobial properties.

show abstract

Section: Ft-ir Spectra Of Schiff Base and Its Complexesmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phosphorus Schiff base ligand and its complexes: Experimental and theoretical investigations

Suleman

Al‐Hamdani

Ahmed

et al. 2020

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

show abstract

“…Two peaks at 874 and 980 nm described to electronic transition 3 T 1(F) → 3 T 1(p) and 3 T 1(F) → 3 T 2(F) gradually. [12][13][14] The diamagnetic Pd(II) of low spin complex appears peaks at 474 nm due to 1 A 1g → 1 A 2g and the speak band at 876 nm attributed 1 A 1g → 1 B 1g . These assignments correspond to a square planer Pd(II) complex.…”

Section: Electronic Spectramentioning

confidence: 99%

Synthesis and bioactivity studies of novel Schiff bases and their complexes

Zoubi

Jirjees

Suleman

et al. 2019

J of Physical Organic Chem

Self Cite

View full text Add to dashboard Cite

The new Schiff base (L) “4‐[(2,4‐dimethoxy‐benzylidene)‐amino]‐1,5‐dimethyl‐2‐phenyl‐1,2‐dihydro‐pyrazol‐3‐one” was synthesized from 2,4‐dimethoxy‐benzaldehyde and 4‐amino‐1,5‐dimethyl‐2‐phenyl‐1,2‐dihydropyrazol‐3‐one, and the geometry of Schiff base was characterized and determined by proton nuclear magnetic resonance (1H‐NMR), mass, Fourier transform infrared (FT‐IR), and ultraviolet‐visible (UV‐vis) spectroscopy. Schiff complexes of Ni(II), Pd(II), Pt(IV), Zn(II), Cd(II), and Mg(II) have been prepared by reaction of ion metals with as‐prepared Schiff base. The results showed that synthesized complexes offered 1:2 metal‐ligand ratios. Furthermore, the Schiff complexes were a tetrahedral in complexes Ni(II), Zn(II), Cd(II), and Hg(II), octahedral Pt(II), and square planer complex Pd(II). Additionally, density functional theory (DFT) was applied for calculations of both spectroscopic properties and electronic structure of prepared Schiff bases. Moreover, the Schiff base and its metal complexes have been verified in vitro against Streptococcus, Esherichia coli, Candida albicans, and Candida tropicalis in order to assess their antibacterial potential. The findings indicate that the biological activity augments on complexation reaction.

show abstract

“…[1,2] Schiff bases are also of interest in industrial fields and as a corrosion inhibitor, thermostable materials, as well as, powerful ligands in the formation of coordination compounds. [3] Recently, Al Zoubi and co-workers have reported the synthesis and structural characterization of Schiff bases and their complexes derived from different amines. [4] These compounds exhibit antimicrobial activity against several Grampositive and Gram-negative bacteria.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and biological activity of Schiff bases metal complexes

Zoubi

Al‐Hamdani

Ahmed

et al. 2017

J of Physical Organic Chem

Self Cite

View full text Add to dashboard Cite

The new Schiff base 1‐[(2‐{1‐[(dicyclohexylamino)‐methyl]‐1H‐indol‐3‐yl}‐ethylimino)‐methyl]naphthalen‐2‐ol (HL) was prepared from 1‐{[2‐(1H‐Indol‐3‐yl)‐ethylimino] methyl}‐naphthalen‐2‐ol and dicyclohexyl amine. From this Schiff base, monomeric complexes [M (L)n (H2O)2 Cl2] with M = Cr, Fe, Mn, Cd, and Hg were synthesized and characterized based on elemental analysis (EA), FT‐IR, mass(MS), UV‐visible, thermal analysis, magnetic moment, and molar conductance. The results showed that the geometrical structural were octahedral geometries for the Cr(III) and Fe(III) complexes, square planer for Pd(II) complex, and tetrahedral for Mn(II), Cd(II), and Hg(II) complexes. Kinetic parameters such as ΔE*,ΔH*, ΔG*, and K of the thermal decomposition stages were calculated from the TGA curves using Coats‐Redfern method. Additionally, density functional theory (DFT) was applied for calculations of both electronic structure and spectroscopic properties of synthesized Schiff base and its complexes. The analysis of electrostatic potential (EPS) maps correlates well with the computed energies providing on the dominant electrostatic nature of N‐H‐‐‐O interactions. The biological activities had been tested in vitro against Staphylococcus aureus, Pseudomonas aeruginosa, as well fungi like Penicillium expansum, Fusarium graminearum, Macrophomina phasealina, and Candida albicans bacteria in order to assess their antimicrobial potential.

show abstract

Cover Image

Abstract: The cover image is based on the Full Paper Phosphorus‐based Schiff bases and their complexes as nontoxic antioxidants: Structure–activity relationship and mechanism of action by Wail Al Zoubi et al., https://doi.org/10.1002/aoc.5210

Cited by 23 publications

References 0 publications

Phosphorus Schiff base ligand and its complexes: Experimental and theoretical investigations

Phosphorus Schiff base ligand and its complexes: Experimental and theoretical investigations

Synthesis and bioactivity studies of novel Schiff bases and their complexes

Synthesis, characterization, and biological activity of Schiff bases metal complexes

Contact Info

Product

Resources

About