Design, spectral characterization, DFT and biological studies of transition metal complexes of Schiff base derived from 2-aminobenzamide, pyrrole and furan aldehyde

Tyagi, Prateek; Chandra, Sulekh; Saraswat, B. S.; Sharma, Deepansh

doi:10.1016/j.saa.2015.02.027

Cited by 47 publications

(39 citation statements)

References 28 publications

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“…The third step thermal decomposition form 215.7 to 358.3 °C corresponds to loss of a release of a Schiff base ligand with mass loss of 42.39% (calculated 44.28%). The last step (358.3–790.1 °C) with mass loss of 68.6% (calculated 66.7%) was assigned to removal of partial pyrolysis of the rest of the organic component, the total mass loss was in accordance with the formation of CoO as the final residue …”

Section: Resultsmentioning

confidence: 99%

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: Resultsmentioning

confidence: 99%

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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“…In the IR spectra of the ligands, the bands originally attributed to ν(CO) of aldehyde and ν(NH 2 ) of aminothiazole at 1750, 3320 and 3460 cm −1 , respectively, of the starting materials were absent. Instead, a new band appeared at 1653–1672 cm −1 , assigned to ν(HCN) vibration, which confirms the formation of Schiff base . Comparison of the IR spectral data of the ligands and the metal complexes reveals that the band corresponding to ν(HCN) vibration shifts in frequency by 20–25 cm −1 for all the metal complexes, which indicates the involvement of nitrogen of azomethine in metal complexation .…”

Section: Resultsmentioning

confidence: 82%

Co(II), Ni(II), Cu(II) and Zn(II) complexes of aminothiazole‐derived Schiff base ligands: Synthesis, characterization, antibacterial and cytotoxicity evaluation, bovine serum albumin binding and density functional theory studies

Prakash

Malhotra

2017

Applied Organom Chemis

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Transition metal complexes of type M(L)2(H2O)x were synthesized, where L is deprotonated Schiff base 2,4‐dihalo‐6‐(substituted thiazol‐2‐ylimino)methylphenol derived from the condensation of aminothiazole or its derivatives with 2‐hydroxy‐3‐halobenzaldehyde and M = Co2+, Ni2+, Cu2+ and Zn2+ (x = 0 for Cu2+ and Zn2+; x = 2 for Co2+ and Ni2+). The synthesized Schiff bases and their metal complexes were thoroughly characterized using infrared, 1H NMR, electronic and electron paramagnetic resonance spectroscopies, elemental analysis, molar conductance and magnetic susceptibility measurements, thermogravimetric analysis and scanning electron microscopy. The results reveal that the bidentate ligands form complexes having octahedral geometry around Co2+ and Ni2+ metal ions while the geometry around Cu2+ and Zn2+ metal ions is four‐coordinated. The geometries of newly synthesized Schiff bases and their metal complexes were fully optimized in Gaussian 09 using 6–31 + g(d,p) basis set. Fluorescence quenching data reveal that Zn(II) and Cu(II) complexes bind more strongly to bovine serum albumin in comparison to Co(II) and Ni(II) complexes. The ligands and their complexes were evaluated for in vitro antibacterial activity against Escherichia coli ATCC 25922 (Gram negative) and Staphylococcus aureus ATCC 29213 (Gram positive) and cytotoxicity against lever hepatocellular cell line HepG2.

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“…Molar conductance: Molar conductance for Mn(II) complexes lies in the range of 4-5 (Ω -1 cm 2 mol -1 ) and for Co(II) complexes lies in the range of 5-6 (Ω -1 cm 2 mol -1 ) in DMSO, indicate the non-electrolytic character of the metal complexes [24]. The complexes are supposed to six coordinated and to have octahedral geometry [25].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Antibacterial Investigation of Mn(II) and Co(II) Complexes of Schiffs Base Ligand

Tyagi

Chandra

2019

Asian J. Chem.

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The metal complexes of transition element derived from Schiffs base ligand widely studied as they are easily prepared, available, low cost materials, have tendency of complexation [1]. The Schiffs base compounds contains the >C=N-linkage which is generally formed by condensation reaction between amine and ketone or aldehyde [2]. From last decades, various applications like antifungal, anticancer, antioxidant, antiviral, antimalarial, anti-inflammotry and antibacterial activities were reported [3]. Schiffs bases generally used as the ligands, have strong tendency to coordinate with the main group metals and transition metals [4]. Metal complexes of Schiffs base stimulated a vigorous interest for the contributions as material [5-9], as they have various applications in the fundamental and the applied sciences [10-12] widely in coordination chemistry [13,14]. Synthesis of new ligand which have different properties and the novel reactivity was perhaps the most important step as the ligands have electron donor and electron acceptor properties, different structural functional groups [15]. Position of ligand in coordination sphere is a major factor of the different studies [16]. Complexes of the multi-donor ligands widely used as they are biological active substances [17]. Thiadiazole derivatives

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Design, spectral characterization, DFT and biological studies of transition metal complexes of Schiff base derived from 2-aminobenzamide, pyrrole and furan aldehyde

Cited by 47 publications

References 28 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

Co(II), Ni(II), Cu(II) and Zn(II) complexes of aminothiazole‐derived Schiff base ligands: Synthesis, characterization, antibacterial and cytotoxicity evaluation, bovine serum albumin binding and density functional theory studies

Synthesis and Antibacterial Investigation of Mn(II) and Co(II) Complexes of Schiffs Base Ligand

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