Structural characterization and electrochemical studies of Co(II), Zn(II), Ni(II) and Cu(II) Schiff base complexes derived from 2-((E)-(2-methoxyphenylimino)methyl)-4-bromophenol; Evaluation of antioxidant and antibacterial properties

Galini, Masumeh; Salehi, Mehdi; Kubicki, Maciej; Amiri, Ahmad; Khaleghian, Ali

doi:10.1016/j.ica.2017.02.001

Cited by 39 publications

(11 citation statements)

References 46 publications

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“…The peak separation (△ E p 2) is 2.0228 V and the proportion of the peak current ( i pa 2 / i pc 2 ) is 0.9800 . The separation in peak potentials are larger than △ E p = 0.059/n V consistent with the quasi‐reversibility for two Cu (II)/Cu (I) and Co (II)/Co (I) couples of complexes 1 and 2 , which are in accordance with those observed in related Cu (II) and Co (II) Schiff base complexes . Simultaneously, experimental result is also verified by the X‐ray photoelectron spectrum measurement of the Co (II) complex in the energy region of Co2p 1/2 and Co2p 3/2 .…”

Section: Resultssupporting

confidence: 86%

Structural characterizations, spectroscopic, electrochemical properties, and antibacterial activities of copper (II) and cobalt (II) complexes containing imidazole ring

Chai

Zhou

Zhang

et al. 2018

Applied Organom Chemis

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Two two-dimensional and three-dimensional supramolecular complexes [M (L) 2 ] (NO 3 ) 2 ·2CH 3 OH (M = Cu(1) and Co(2), L = 2-(4-imidazolyl)-4-methyl-1,2-quinazoline-N 3 -oxide), were synthesized and characterized by FT-IR and UV-Vis spectroscopy, as well as elemental analysis. The spectroscopic data of both complexes were compared with the ligand L. Both complexes were determined by X-ray single-crystal diffraction and display similar coordination geometry and have a 2:1 ligand-to-metal ratio. All the central M (II) atoms are hexa-coordinated with perfect octahedral geometries. In the crystal structures, complexes 1 and 2 form an infinite 1-D chain-like and 2-D, 3-D supramolecular frameworks. X-ray photoelectron spectrum (XPS) and thermal stability of 2 was investigated. Moreover, electrochemical properties and antimicrobial activities of both complexes were also studied.

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Section: Resultssupporting

confidence: 86%

Structural characterizations, spectroscopic, electrochemical properties, and antibacterial activities of copper (II) and cobalt (II) complexes containing imidazole ring

Chai

Zhou

Zhang

et al. 2018

Applied Organom Chemis

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“…As seen, the Schiff base ligand shows a strong band at 362 nm which can be associated to n → π* transition of the azomethine chromophore. This band disappears in complexes after bonding Schiff base ligand to metal center [51]. All the bands in the 200-300 nm region are attributed to the π → π* transitions of the aromatic rings and the azomethine group.…”

Section: Spectroscopic Characterizations Of the Complexesmentioning

confidence: 94%

New complexes of Ni(II) and Cu(II) with tridentate ONO Schiff base ligand: synthesis, crystal structures, electrochemical and theoretical investigation

et al. 2018

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In this research, we prepared a new series of the Cu(II) (1) and Ni(II) (2) metal complexes of a tridentate Schiff base ligand, (E)-2-(5-bromo-2-hydroxybenzylideneamino) phenol (H 2 L). These complexes were characterized by elemental analysis, FT-IR, UV-Vis, and 1 H-NMR spectroscopy. The crystal structures of (1) and (2) were determined by X-ray diffraction studies. The single crystal X-ray diffraction analyses revealed that copper(II) cation is five-coordinated and the coordination polyhedron is a slightly distorted square pyramid. Nickel(II), on the other hand, is four-coordinated, and has a regular, square planar geometry. Further discussed were the electrochemical reduction of these complexes. We also analyzed the nature of the metal-ligand bond in the complexes through NBO and EDA analysis. Besides, vibrational sample magnetometer (VSM) revealed complex (1) was ferromagnetic.

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“…Compounds of Zinc having other ligands in bidentate coordination mode are reported as biologically active materials. This is the case of the octahedral complexes of Zn(II) with Schiff bases that showed MIC´s of 150 and 125 µg mL -1 against S. aureus and E.coli respectively (Adly, Taha, & Fahmy, 2013;Galini, Salehi, Kubicki, Amiri, & Khaleghian, 2017;Taghizadeh, Montazerozohori, Masoudiasl, Joohari, & White, 2017).…”

Section: Bacterial Activitymentioning

confidence: 99%

Synthesis, characterization and antimicrobial effect of Cu(ii) and Zn(ii) compounds derived from 1,2,4-triazoles

et al. 2022

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Compounds of Cu(II) and Zn(II) with 3-R-1H-1,2,4-triazole-5-amine {R = methyl (mta), phenyl (pta)} were prepared and characterized by infrared spectroscopy (IR), multinuclear NMR (1H, 13C), electronic spectroscopy (UV-VIS), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), microanalyses and melting point. Dimeric, monomeric, and polymeric materials were synthesized in this work. The Zn(II)-1,2,4-triazole derivatives have the metal ion at the center of two geometric arrangements, being a tetrahedron for the complex-7 and 9, and an octahedron for the complex-8. The only polymeric material, complex-7, was characterized by the DSC analytical data. The Decomposition reaction of complex-8 in chloroform produced the complex-9, a aminoguanidine derivative, and the Zn(II)-benzoate compound. The IR and UV-VIS of Cu(II)-mta derivatives revealed two possible geometric patterns for the metallic ion; a distorted bipyramidal trigonal geometry for compounds 10 and 11 in solution, and in the solid state, the same geometry for complex-10, but for complex-11, the IR data suggest a distorted octahedral geometry. The biological assay of the 1,2,4-triazole compounds and their metal derivatives against Gram-positive and Gram-negative bacteria shown the compounds of Zn(II) as the only active materials with values of MIC within the range of 133.5 µM (83.3 µg / mL) to 360.7 µM (166.6 µg / mL).

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Structural characterization and electrochemical studies of Co(II), Zn(II), Ni(II) and Cu(II) Schiff base complexes derived from 2-((E)-(2-methoxyphenylimino)methyl)-4-bromophenol; Evaluation of antioxidant and antibacterial properties

Cited by 39 publications

References 46 publications

Structural characterizations, spectroscopic, electrochemical properties, and antibacterial activities of copper (II) and cobalt (II) complexes containing imidazole ring

Structural characterizations, spectroscopic, electrochemical properties, and antibacterial activities of copper (II) and cobalt (II) complexes containing imidazole ring

New complexes of Ni(II) and Cu(II) with tridentate ONO Schiff base ligand: synthesis, crystal structures, electrochemical and theoretical investigation

Synthesis, characterization and antimicrobial effect of Cu(ii) and Zn(ii) compounds derived from 1,2,4-triazoles

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