Synthesis, characterisation and density functional theory (DFT) studies of a triazine ring with a mixed ligand Schiff base complexes

Bennour, Hamdi A. M.; Elmagbari, Fatin M.; Hammouda, Ahmed N.; El-Ferjani, Rashd M.; Amer, Younis O. Ben; Soliman, Saied M.; Jackson, Graham E.

doi:10.1016/j.rechem.2023.100775

Cited by 5 publications

(2 citation statements)

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“…Its structure was confirmed by IR, NMR and as well as by X-ray diffraction. The different metal complexes were fully characterised using elemental analysis, molar conductivity, infrared and electronic spectra [20]. In the present work, we present the synthesis and spectral studies of a Schiff base (Z)-4-((4-(dimethylamino)benzylidene)amino)-3-hydroxynaphthalene-1-sulfonic acid (L).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterisation of Cr(III) and Co(II) Schiff Base Complexes

Elmagbari¹,

Hammouda²,

Bennour³

et al. 2023

MSA

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Co(II) and Cr(III) metal complexes of Schiff bases were synthesized from the condensation reaction between 4-(dimethylamino)benzaldehyde and 4-amino-3-hydroxy-naphthalene-1-sulfonic acid. Their structures were investigated by elemental analysis, molar conductance measurements, infrared spectroscopy, electronic spectroscopy, and 1 HNMR spectroscopy. The elemental analysis data suggested a 1:1 [M:L] ratio for the complexes. The molar conductance measurements of the complexes indicate their electrolytic nature in DMSO as a solvent. The absorption bands in the electronic spectra verified an octahedral environment around the metal ions in the complexes.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterisation of Cr(III) and Co(II) Schiff Base Complexes

Elmagbari¹,

Hammouda²,

Bennour³

et al. 2023

MSA

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“…In the literature, the azomethine nitrogen is conjugated with phenolic oxygen [14][15][16][17][18], quinoline [13,[19][20][21] or phenolic oxygen and carbonyl [22,23] to facilitate the chelating/ coordinating properties of ligands to metal ions. The present work will describe the synthesis of Cu(II), Co(II), Ni(II), Cd(II), Cr(III) and Fe(III) complexes with three Schiff base ligands (NQ, CQ and HQ) which were prepared by condensation of quinoline-3carbohydrazide with aromatic aldehydes: 2-nitrobenzaldehyde, 2-chlorebenzaldehyde and 2,4-dihydroxybenzaldehyde, respectively (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Metal Complexes of Schiff Bases Prepared from Quinoline-3-Carbohydrazide with 2-Nitrobenzaldehyde, 2-Chlorobenzaldehyde and 2,4-Dihydroxybenzaldehyde: Structure and Biological Activity

Sunjuk,

Al-Najjar,

Shtaiwi

et al. 2023

Inorganics

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Three Schiff base ligands, NQ, CQ and HQ, were prepared from the reaction of quinoline-3-carbohydrazide with 2-nitrobenzaldehyde, 2-chlorobenzaldehyde and 2,4-dihydroxybenzaldehyde, respectively, and were investigated for their coordination to Cu (II), Ni(II), Co(II), Cd(II), Cr(III) and Fe(III) chlorides. The NQ preparation and the X-ray structure of NQ and CQ, as well as the transition metal complexes of NQ, CQ and HQ, were reported for the first time. FTIR, 1H-NMR, magnetic susceptibility and elemental analysis were used to study the coordination of ligands to the metal ions. Based on the magnetic susceptibility and elemental analysis results, octahedral structures of the complexes such as [CuL2Cl(OH)], [FeL2Cl2(OH)] and [CoL2Cl(OH)] were proposed for L = NQ, CQ and HQ. The relatively large Cd(II) exhibited [CdL3(OH)2]. The FTIR study revealed that NQ and CQ are coordinated to the metal ions via azomethine nitrogen and carbonyl oxygen while HQ through azomethine nitrogen and phenolic oxygen. Despite the high solvation power of DMSO solvent in 1H-NMR experiments, the azomethine HC=N peak at 9.3 ppm is the most affected by complexation with metal ions. On the other hand, quinoline nitrogen seems to be a weaker coordinating site than the azomethine nitrogen. The HQ ligand, containing phenolic groups, and its complexes with Cu and Ni were found to have inhibitory effects on human breast adenocarcinoma MCF-7 and human chronic myelogenous leukemia K562. Nevertheless, metal ions did not exhibit a significant synergistic effect on the antiproliferative activity of the ligands investigated.

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