Synthesis, characterization, and biological evaluation of new polyester containing Schiff base metal complexes

Nishat, Nahid; Hasnain, Sumaiya; Ahmad, Tansir; Parveen, A. Asha

doi:10.1007/s10973-011-1442-8

Cited by 35 publications

(10 citation statements)

References 32 publications

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“…All complexes spectra display also a very strong band about 1605–1610 cm –1 , shifted to lower wavenumbers in comparison with free ligand. Such shift supports the participation of the azomethine nitrogen in coordination 20–25. The stretching vibration ν(C–O) of the phenol group of the free ligand is shifted from 1272 cm –1 to lower wavenumbers (1259–1266 cm –1 ) in the complexes spectra suggesting coordination of this group 26.…”

Section: Resultssupporting

confidence: 58%

Mononuclear Complexes Based on Pyrimidine Ring Azo Schiff‐Base Ligand: Synthesis, Characterization, Antioxidant, Antibacterial, and Thermal Investigations

Gülcan

Özdemir

Dündar

et al. 2014

Zeitschrift anorg allge chemie

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Six transition metal(II) complexes with the heterocyclic ligand HL (1), [CuL 2 ]·H 2 O (2), [NiL 2 ]·3H 2 O (3), [CoL 2 ]·3H 2 O (4), [MnL 2 ]·3H 2 O (5), [ZnL 2 ]·2H 2 O (6), [PdLOAc]·H 2 O (7) [HL = 5-benzoyl-1-((E)-(2-hydroxy-5-((E)-phenyldiazenyl)benzylidene)amino)-4phenylpyrimidin-2(1H)-one] were synthesized. The features of the azo Schiff bases were assigned from microanalytical, spectroscopic (IR, UV/Vis., 1 H-and 13 C NMR, API-ES mass), magnetic, and molar conductivity measurements at room temperature as well as thermal analysis. The electronic absorption spectroscopy and magnetic susceptibility measurements of the complexes indicate square pyramidal arrangement for Pd II and octahedral environment for all the other complexes. The azo Schiff base HL acts as a monobasic tridentate ligand, which * Assist. Prof. Dr. M. Gulcan

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Section: Resultssupporting

confidence: 58%

Mononuclear Complexes Based on Pyrimidine Ring Azo Schiff‐Base Ligand: Synthesis, Characterization, Antioxidant, Antibacterial, and Thermal Investigations

Gülcan

Özdemir

Dündar

et al. 2014

Zeitschrift anorg allge chemie

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“…1 H NMR spectra of 2-hydroxy-5-chloromethylbenzaldehyde 1 , PSA 2 and PDOX 3 are shown in figure 2 . Owing to presence of two directing groups on the phenyl, the chloromethylene group in 1 was substituted at meta position as shown in scheme 1 [ 30 ]. Resonance for methylene protons for 1 was found at 4.51 ppm.…”

Section: Resultsmentioning

confidence: 99%

“…The decrease in carbon percentage of PDOX afforded an evidence for the formation of dioxirane groups on PSA. Owing to presence of two directing groups on the phenyl, the chloromethylene group in 1 was substituted at meta position as shown in scheme 1 [30]. Resonance for methylene protons for 1 was found at 4.51 ppm.…”

Section: Characterization Of Polysalicylaldehyde and Polydioxiranementioning

confidence: 99%

Selective and metal-free epoxidation of terminal alkenes by heterogeneous polydioxirane in mild conditions

et al. 2018

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Polydioxirane (PDOX) was prepared by the treatment of polysalicylaldehyde with Oxone and was found as a selective, highly efficient and heterogeneous reagent for epoxidation of alkenes which can be successfully isolated. This work also introduced a simpler, safer and milder way for epoxidation of alkenes with dioxirane groups than before. PDOX can be simply recovered from the reaction mixture by plain filtration and reused for eight runs without significant reactivity loss.

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“…This is due to their synthesis process being simple, and their having excellent characteristics and various applications such as in bioactivity, catalysis and in optical sensors . Notable biological activities of Schiff base metal complexes include antiviral, anti‐tubercular, antioxidant, anti‐inflammatory, antifungal, analgesic and antibacterial effects, as investigated in previous studies . Also, ligands containing N═C‐C═N units display a strong chelating ability through electron delocalization, which is combined with extended conjugation.…”

Section: Introductionmentioning

confidence: 97%

Molecular structure, molecular docking, thermal, spectroscopic and biological activity studies of bis‐Schiff base ligand and its metal complexes

Zayed

Hindy

2017

Applied Organom Chemis

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Mn(II) ions were synthesized from the ligand [4,4′-((((ethane-1,2-diylbis(oxy)) bis(2,1-phenylene))bis(methanylylidene))bis(azanylylidene))diphenol]ethane (H 2 L) derived from the condensation of bisaldehyde and 4-aminophenol. Microanalysis, magnetic susceptibility, infrared, 1 H NMR and mass spectroscopies, molar conductance, X ray powder diffraction and thermal analysis were used to confirm the structure of the synthesized chelates. According to the data obtained, the composition of the 1:1 metal ion-bis-Schiff base ligand was foundand Mn(II), n = 2; Fe(III), n = 3). Magnetic susceptibility measurements and reflectance spectra suggested an octahedral geometry for the complexes. Central metals ions and bis-Schiff base coordinated together via O2 and N2 donor sites which as evident from infrared spectra. The Gaussian09 program was applied to optimize the structural formula for the investigated Schiff base ligand. The energy gaps and other important theoretical parameters were calculated applying the DFT/B3LYP method. Molecular docking using AutoDock tools was utilized to explain the experimental behaviour of the Schiff base ligand towards proteins of Bacillus subtilis (5 h67), Escherichia coli (3 t88), Proteus vulgaris (5i39) and Staphylococcus aureus (3ty7) microorganisms through theoretical calculations. The docked protein receptors were investigated and the energies of hydrogen bonding were calculated. These complexes were then subjected to in vitro antibacterial studies against several organisms, both Gram negative (P. vulgaris and E. coli) and Gram positive (S. pyogones and B. subtilis). The ligand and metal complexes exhibited good microbial activity against the Gram-positive andGram-negative bacteria.KEYWORDS bioinorganic chemistry, bis-Schiff base ligand, in vitro biological activity, IR spectroscopy, metal complexes, thermal analysis

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Synthesis, characterization, and biological evaluation of new polyester containing Schiff base metal complexes

Cited by 35 publications

References 32 publications

Mononuclear Complexes Based on Pyrimidine Ring Azo Schiff‐Base Ligand: Synthesis, Characterization, Antioxidant, Antibacterial, and Thermal Investigations

Mononuclear Complexes Based on Pyrimidine Ring Azo Schiff‐Base Ligand: Synthesis, Characterization, Antioxidant, Antibacterial, and Thermal Investigations

Selective and metal-free epoxidation of terminal alkenes by heterogeneous polydioxirane in mild conditions

Molecular structure, molecular docking, thermal, spectroscopic and biological activity studies of bis‐Schiff base ligand and its metal complexes

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