Nickel(II) and copper(II) complexes with an asymmetric bidentate Schiff-base ligand derived from furfurylamine

Khalaji, Aliakbar Dehno; Rad, Sepideh Maghsodlou; Grivani, Gholamhossein

doi:10.1007/s10973-010-1024-1

Cited by 39 publications

(12 citation statements)

References 29 publications

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“…[46] Thus, addition of metal ion to ligand solution causes characteristic changes in the visible absorption spectrum of the ligand, suggesting an immediate complex formation in solution. [47] The designed complexes display a characteristic band centred at λ max = 251-393 nm, due to an intramolecular charge transfer transition taking place in the complexed ligand. Moreover, there is a band appearing in the region 437-484 nm, which can be attributed to charge transfer from ligand to metal.…”

Section: Electronic Spectra and Magnetic Properties Of Metal Complexesmentioning

confidence: 99%

Ni(II) and Cu(II) complexes with ONNO asymmetric tetradentate Schiff base ligand: synthesis, spectroscopic characterization, theoretical calculations, DNA interaction and antimicrobial studies

Abdel‐Rahman

Abu‐Dief

Moustafa

et al. 2016

Applied Organom Chemis

137

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A novel Schiff base, namely Z‐3‐((2‐((E)‐(2‐hydroxynaphthyl)methylene)amino)‐5‐nitrophenylimino)‐1,3‐dihydroindin‐2‐one, was synthesized from the condensation of 2‐hydroxy‐1‐naphthaldehyde and isatin with 4‐nitro‐o‐phenylenediamine. It was structurally characterized on the basis of 1H NMR, 13C NMR and infrared spectra and elemental analyses. In addition, Ni(II) and Cu(II) complexes of the Schiff base ligand were prepared. The nature of bonding and the stereochemistry of the investigated complexes were elucidated using several techniques, including elemental analysis (C, H, N), Fourier transform infrared and electronic spectroscopies and molar conductivity. The thermal behaviours of the complexes were studied and kinetic–thermodynamic parameters were determined using the Coats–Redfern method. Density functional theory calculations at the B3LYP/6‐311G++ (d, p) level of theory were carried out to explain the equilibrium geometry of the ligand. The optimized geometry parameters of the complexes were evaluated using LANL2DZ basis set. The total energy of highest occupied and lowest unoccupied molecular orbitals, Mullikan atomic charges, dipole moment and orientation are discussed. Moreover, the interaction of the metal complexes with calf thymus DNA (CT‐DNA) was explored using electronic spectra, viscosity measurements and gel electrophoresis. The experimental evidence indicated that the two complexes could strongly bind to CT‐DNA via an intercalation mechanism. The intrinsic binding constants of the investigated Ni(II) and Cu(II) complexes with CT‐DNA were 1.02 × 106 and 2.15 × 106 M−1, respectively, which are higher than that of the standard ethidium bromide. Furthermore, the bio‐efficacy of the ligand and its complexes was examined in vitro against the growth of bacteria and fungi to evaluate the antimicrobial potential. Based on the obtained results, the prepared complexes have promise for use as drugs. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Electronic Spectra and Magnetic Properties Of Metal Complexesmentioning

confidence: 99%

Ni(II) and Cu(II) complexes with ONNO asymmetric tetradentate Schiff base ligand: synthesis, spectroscopic characterization, theoretical calculations, DNA interaction and antimicrobial studies

Abdel‐Rahman

Abu‐Dief

Moustafa

et al. 2016

Applied Organom Chemis

137

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“…On complexation this band disappeared suggesting the coordination of azomethine nitrogen to the metal ion, as the formation of the metalnitrogen bond stabilizes the electron pair on the nitrogen atom [53]. Thus addition of metal ion to the ligand solution causes characteristic changes in the visible absorption spectra of the ligand, suggesting an immediate complex formation in solution [54]. The designed complexes display a characteristic band centered at λ max = 321-393 nm, due to an intramolecular charge transfer transition taking place in the complexed ligand.…”

Section: Electronic Spectramentioning

confidence: 99%

Some New Nano-sized Mononuclear Cu(II) Schiff Base Complexes: Design, Characterization, Molecular Modeling and Catalytic Potentials in Benzyl Alcohol Oxidation

et al. 2016

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In the present contribution, some novel Cu(II) complexes were synthesized from tri-and tetradentate imine ligands. All the prepared compounds were elucidated by different physicochemical methods. Density Functional Theory calculations were carried out to explain the equilibrium geometry of the bsisnph and npisnph ligands and their Cu(II) complexes. Interaction of the synthesized ligands with Cu(II) affords nano-sized particles via TEM. The catalytic potentials of the prepared complexes has been tested within the oxidation of benzyl alcohol using an environmental friendly terminal oxidant, i.e. H 2 O 2 . The effect of various parameters, e.g. solvents, temperature and amount of catalyst was investigated. A mechanistic pathway of the catalytic oxidation was tentatively described and discussed. Graphical AbstractKeywords Cu(II) Schiff base complexes · TEM · Benzyl alcohol · Density Functional Theory · Catalytic activity · Hydrogen peroxide

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“…They are prepared in a simple way by condensing a carbonyl group with an amine, usually in an alcohol solution [7,8]. The most common examples of these compounds are prepared from salicylaldehyde derivatives to form a Schiff base ligand [9,10]. Our group is interested in the synthesis, characterization and crystal structure of new Schiff base compounds and their transition metal complexes [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Schiff bases derived from 3,4-dimethoxybenzaldehyde: The crystal structure of N,N′-bis(3,4-dimethoxy-benzylidene)-2,2-dimethylpropane-1,3-diamine hydrate

Khalaji

Foroghnia

Fejfarová³

et al. 2013

J Struct Chem

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The Schiff base compounds N,N′-bis(3,4-dimethoxybenzylidene)-2,2-dimethylpropane-1,3-diamine hydrate, (3,4-MeO-ba) 2 Mepn.H 2 O (1), and N,N′-bis(3,4-dimethoxybenzylidene)butane-1,4-diamine, (3,4-MeO-ba) 2 bn (2), with different central groups derived from 3,4-dimethoxybenzaldehyde are synthesized and characterized by elemental analysis, FT-IR and 1 H NMR spectroscopy. The crystal structure of 1 is determined by single crystal X-ray diffraction. Each imino functional group (-C=N-) is coplanar with its adjacent benzene ring and the two benzene rings form a dihedral angle of 86.868(27)°. Title compound 1 crystallizes in the monoclinic space group P2 1 /n with unit cell parameters: a = 9.0774(2) Å, b = 29.2138(5) Å, c = 8.5696(2) Å, β = 92.4756(14)°, V = 2270.41(8) Å 3 and Z = 4.

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Nickel(II) and copper(II) complexes with an asymmetric bidentate Schiff-base ligand derived from furfurylamine

Cited by 39 publications

References 29 publications

Ni(II) and Cu(II) complexes with ONNO asymmetric tetradentate Schiff base ligand: synthesis, spectroscopic characterization, theoretical calculations, DNA interaction and antimicrobial studies

Ni(II) and Cu(II) complexes with ONNO asymmetric tetradentate Schiff base ligand: synthesis, spectroscopic characterization, theoretical calculations, DNA interaction and antimicrobial studies

Some New Nano-sized Mononuclear Cu(II) Schiff Base Complexes: Design, Characterization, Molecular Modeling and Catalytic Potentials in Benzyl Alcohol Oxidation

Characterization of Schiff bases derived from 3,4-dimethoxybenzaldehyde: The crystal structure of N,N′-bis(3,4-dimethoxy-benzylidene)-2,2-dimethylpropane-1,3-diamine hydrate

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