Synthesis, characterization, thermal stability, electrochemical behavior, and antioxidant activity of new oxovanadium(iv) and iron(ii) tetradentate Schiff base complexes

Maghraoui, Nadjah; Aggoun, Djouhra; Bouzerafa, Brahim; Bezzi, Hamza; Ouennoughi, Yasmina; López, Daniel; Garcı́a, Marta Fernández; Ourari, Ali; Mubarak, Mohammad S.

doi:10.1016/j.arabjc.2021.103025

Cited by 20 publications

(5 citation statements)

References 54 publications

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“…The appearance of absorption band at 474.23 cm −1 was attributed to N─Fe and O─Fe as well as the absorption band for the C─C appeared at 1458.14 cm −1 . The bands related to aromatic ring appeared in 1500–2200 cm −1 range (Maghraoui et al , 2021).…”

Section: Resultsmentioning

confidence: 99%

Electrochemical study on using aminated MIL–101(Cr) as corrosion inhibitor for mild steel in acidic environment

Hassan

Alsohaimi²,

El-Aassar³

et al. 2022

ACMM

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Purpose The purpose of this paper is to confirm the importance of using metal–organic frameworks (MOFs) in the field of corrosion control due to their potential use as corrosion inhibitors. Design/methodology/approach NH2–MIL–101(Cr), an amine-functionalized chromium-based MOF [Cr(III)-MOF], was prepared by solvothermal technique. Thereafter, Cr-MOF was used as an anticorrosion additive for mild steel (MS) in 1 m HCl solution. This inhibition behavior was tested by electrochemical tests including electrochemical impedance spectroscopy and potentiodynamic polarization (PDP). Findings Increasing the added amount of Cr-MOF enhances its inhibition performance, which attained 96.40% at 30 ppm. The obtained data from PDP measurements describe Cr-MOF as a mixed-type inhibitor. Based on SEM/EDS and FTIR analysis, the adsorption of Cr-MOF on the surface of MS that prevents MS corrosion has been demonstrated. Furthermore, Langmuir model is the most adequate adsorption isotherm for the obtained experimental data. Originality/value This study revealed that NH2–MIL–101(Cr), an amine-functionalized chromium-based MOF (Cr(III)-MOF), is a potential corrosion inhibitor for MS in 1 m HCl solution.

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Section: Resultsmentioning

confidence: 99%

Electrochemical study on using aminated MIL–101(Cr) as corrosion inhibitor for mild steel in acidic environment

Hassan

Alsohaimi²,

El-Aassar³

et al. 2022

ACMM

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“…Appearance new bands in the spectra of Fe(II), complex at 498 and 436 cm -1 were due to the formation of ν(Fe-N) bond. The proof of coordination to the O atom was provided by the occurrence of the bands in the range 529 and 570 cm -1 in the IR spectra of the complex due to ν(Fe-O) [6,10]. The appearance of new bands at these stretching frequencies were assumed as an on indication of coordination between the Fe metal ion oxygen atom of phenolic group and nitrogen atom of azomethine group.…”

Section: A Spectral Characterizationmentioning

confidence: 99%

“…Transition metal complexes with nitrogen, sulphur or oxygen as ligand atoms became increasingly important because these Schiff bases can bind to different metal centres with different coordination sites, allowing the successful synthesis of metal complexes with interesting stereochemistry [1,2]. In addition, sulphur-and nitrogen-containing ligands and their transition metal complexes have been used as corrosion inhibitors [3,4], as extreme pressure lubricant additives [5], and have shown broad biological activity [6][7][8][9][10] due to the different ways in which they bind to metal ions. They can be bidentate, tridentate, tetradentate or polydentate.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Antioxidant Activities of Schiff Base and Fe(II) Complex

2023

Proceeding Book of 3rd International Conference on Scientific and Academic Research ICSAR 2023

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A new Schiff base (HL) ligand has been synthesized by condensing of ethyl 2-amino-5,5,7,7tetramethyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate and 2-hydroxybenzaldyde. In turn, its Fe(II) complex was prepared, having the following general formula: [LFeCl(H2O)2]•H2O. The geometry of the Fe(II) complex has been revealed by a variety of characterization techniques. Synthesized Schiff base and its Fe(II) complex were also characterized by numerous analytical methods including NMR, FT-IR, UV-visible, mass spectrometry, thermogravimetric-differential thermal analysis (TGA-DTA), elemental analysis, molar conductivity, and magnetic susceptibility for structural elucidation. Results showed that Fe(II) complex decompose in two consecutive stages. The Fe(II) complex was found to have an octahedral geometry. The results show that the Fe ion is coordinated to the Schiff base ligand by carbonyl oxygen, azomethine nitrogen and phenolic oxygen atoms. Schiff base ligand and its Fe(II) complex were also subjected to antioxidant activity studies using in vitro DPPH and ABTS assays. The Fe(II) complex exhibit high in vitro antioxidant activities in both DPPH and ABTS assays. The IC50 values of the complex was found to be 18,34 μg/mL and 35,0 μg/mL, respectively. However, the ligand did not show any antioxidant effects in both methods. These results showed that Fe(II) has effective antioxidant ability compare to the standards.

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“…[4][5][6][7] In recent investigations, a multitude of reports have elucidated that these ligands and their corresponding complexes can find applications in various fields, such as medicinal chemistry, biological systems, luminescent materials, and catalysis. [8][9][10][11][12] Indeed, the architecture of a coordinated metal complex is intricately shaped by a confluence of factors, including the metal's coordination abilities, the flexibility of ligands, and the propensity for interactions between ligands and metal ions. Notably, complexes of transition metals hold particular allure owing to their adaptability in geometric arrangements, a variety of coordination numbers, and a range of oxidation states.…”

Section: Introductionmentioning

confidence: 99%

“…Among the distinguished varieties of polydentate ligands, the Schiff base stands out prominently, commanding considerable interest among researchers for its adeptness in orchestrating coordination with metals through multiple binding sites [4–7] . In recent investigations, a multitude of reports have elucidated that these ligands and their corresponding complexes can find applications in various fields, such as medicinal chemistry, biological systems, luminescent materials, and catalysis [8–12] …”

Section: Introductionmentioning

confidence: 99%

Synthesis, XRD/HSA‐Interactions, QTAIM Analysis, Optical and Nonlinear Optical Responses Studies of Cu(II) Complex with the Schiff Base Ligand Derived from 5‐Bromosalicylaldehyde

Lamiri,

Djaafer‐Moussa,

Merabet

et al. 2023

ChemistrySelect

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In this study, we efficiently synthesized a new Schiff base ligand (H2L) along with its mononuclear complex Cu(II) (1). The chemical structures of these compounds were rigorously determined using various analytical techniques, including UV‐ Vis., FT‐IR, 1H NMR, 13 C NMR CHN elemental analysis, single crystal X‐ray diffraction, and quantum calculations. The X‐ray diffraction analysis of the complex revealed the presence of intermolecular interactions characterized by C−H…Br hydrogen bonds, leading to the formation of 2D layers. We conducted a systematic investigation of these intermolecular interactions using HS and QTAIM analysis. Additionally, we affected a comprehensive analysis of H2L, 1, and 2, focusing on their structural, electronic, and optical properties using DFT and TD‐DFT calculations in gas and solvent. The computed parameters closely matched the experimental data, demonstrating good agreement. Reactivity parameters indicated that complex 2 exhibited lower hardness (~1.7 eV) compared to 1 (~1.8 eV) and H2L (~4.4 eV). NLO analysis revealed substantial α and β values for compound 2 in both static and dynamic regimes. Notably, the β values of the title complexes increased with higher solvent polarity. In summary, our investigation highlights the potential of the title complexes as promising candidates for second‐order nonlinear optical materials.

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Synthesis, characterization, thermal stability, electrochemical behavior, and antioxidant activity of new oxovanadium(iv) and iron(ii) tetradentate Schiff base complexes

Cited by 20 publications

References 54 publications

Electrochemical study on using aminated MIL–101(Cr) as corrosion inhibitor for mild steel in acidic environment

Electrochemical study on using aminated MIL–101(Cr) as corrosion inhibitor for mild steel in acidic environment

Synthesis, Characterization, and Antioxidant Activities of Schiff Base and Fe(II) Complex

Synthesis, XRD/HSA‐Interactions, QTAIM Analysis, Optical and Nonlinear Optical Responses Studies of Cu(II) Complex with the Schiff Base Ligand Derived from 5‐Bromosalicylaldehyde

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