Infrared and Raman studies of [UO2(salen)(L)] (L=H2O and CH3OH)

Nour, E. M.; Taha, A.; Alnaimi, I. S.

doi:10.1016/s0020-1693(00)86387-2

Cited by 51 publications

(21 citation statements)

References 14 publications

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“…The possibility that the electron density on the oxygen atom is decrease upon coordination to metals means decrease in the electron repulsion between the oxygen lone pair and the double bond electrons leading to a stronger C=O bond and then a higher bond frequency. The increase of ν(C=O) frequency upon coordination was reported by the other workers in the spectra of other complexes [13,14]. These changes of the IR spectra suggest that the free ligand is coordinated to the metal ions via oxygen of keto group and nitrogen of carbonitrile group.…”

Section: Resultssupporting

confidence: 69%

“…The nature of the metal ion coordinated to a drug may have a significant role to this diversity. In general for metal complexes showing antimicrobial activity, the following five principal factors [13,14] should be considered: i) the chelate effect; ii) the nature of the ligands; iii) the total charge of the complex; iv) the nature of the ion neutralizing the ionic complex; and v) the nuclearity of the metal center in the complex. Figure 6.…”

Section: Antimicrobial Activitymentioning

confidence: 99%

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Spectroscopic, structural, thermal and antimicrobial studies of 4,6-bis (4-chlorophenyl)- 2-oxo-1,2-dihydropyridine-3-carbonitrile with some transition metals

Sadeek¹,

Zordok²,

El‐Attar³

et al. 2015

Bull. Chem. Soc. Eth.

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ABSTRACT. 4,6-Bis(4-chlorophenyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile (L) reacted with Mn(II), Fe(III), Co(II) and Ni(II) in methanol and acetone as a solvent at room temperature to form a new solid complexes. The isolated complexes were characterized by elemental analysis, magnetic properties, conductance measurements, mass, IR, UV-Vis and 1 H NMR spectroscopic methods and thermal analyses. The thermogravimetric and infrared spectroscopic data confirmed the presence of water in the composition of the complexes and the ligand reacted as a bidentate. The metal -ligand binding in metal complexes is predicted using density functional theory. The ligand and their metal complexes were also evaluated for their antibacterial activity. The complexes showed high activities compared with free ligand.

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Section: Resultssupporting

confidence: 69%

Section: Antimicrobial Activitymentioning

confidence: 99%

Spectroscopic, structural, thermal and antimicrobial studies of 4,6-bis (4-chlorophenyl)- 2-oxo-1,2-dihydropyridine-3-carbonitrile with some transition metals

Sadeek¹,

Zordok²,

El‐Attar³

et al. 2015

Bull. Chem. Soc. Eth.

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show abstract

“…Elemental analysis and physico-analytical data for ibuprofen and its metal complexes. [44][45][46][47][48]. The four vibrations of the uranyl unit, UO 2 , under C s symmetry are 3 A 0 and A 00 , s (U¼O), A 0 ; as (U¼O), A 0 ; (UO 2 ), A 0 and (UO 2 ), A 00 .…”

Section: Ir Data and Bondingmentioning

confidence: 99%

Spectroscopic, thermal analysis, and antimicrobial evaluation of new Y(III), Zr(IV), and U(VI) ibuprofen complexes

Zordok

Sadeek

El‐Shwiniy

2012

Journal of Coordination Chemistry

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New complexes of Y(III), Zr(IV), and U(VI) with the anti-inflammatory drug ibuprofen (IBU) have been synthesized and characterized by elemental analysis, spectroscopic techniques (UVVisible, IR, and 1 H NMR), magnetic moment determination, conductance measurements, and thermal analyses (thermogravimetric and differential thermogravimetric). The anti-inflammatory drug acts as bidentate chelate bound to metal ions through the deprotonated carboxylate. The calculated bond length and force constant, F(U¼O), in the uranyl complex are 1.815 Å and 671.69 Nm À1 , respectively. The metal-ligand binding of the Zr(IV) and Y(III) complexes is predicted using density functional theory at the B3LYP-CEP-31G level of theory and total energy, dipole moment estimation of different Zr(IV) and Y(III) ibuprofen structures. The antibacterial activity of the ligand, metal salts, and metal complexes have been tested, showing that the complexes are significant against all six bacterial species compared with IBU and metal salts.

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“…Some of the Schiff base complexes are used as model molecules for biological oxygen carrier systems [6]. Tetradentate Schiff base complexes are well known to form stable complexes, where the coordination takes place through the N 2 O 2 donor set [7][8][9]. Quantum chemical calculations give crucial information to contribute a full description on spectroscopic, energetic, and molecular properties of the Schiff bases.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Properties and Quantum Chemical Calculations of Novel Diimine Molecules and their Mononuclear Cu(II) Complexes

Dede

Görgülü

2018

Acta Phys. Pol. A

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Two novel Schiff base ligands, 2, 2 I -((pentane-2,4-diylidene)bis(azanylylidene))bis(4-chlorophenol) and 2, 2 I -((pentane-2,4-diylidene)bis(azanylylidene))bis(4-methylphenol) were prepared by condensation reaction of acetylacetone with 2-amino-4-chlorophenol and 2-amino-4-methylphenol, respectively. Mononuclear Cu(II) complex of each ligand was also synthesized. These compounds were characterized by elemental analyses, inductively coupled plasma optical emission spectrometry, the Fourier transform infrared spectra, UV-Vis, molar conductivity, and magnetic susceptibility measurements. The ligands have been further characterized by 1 H-and 13 C-NMR. The results suggest that the metal complexes of the ligands have a metal:ligand ratio of 1:1 and the Cu(II) ions are coordinated by the phenolic oxygen atoms and imine nitrogen atoms of the ligands. Moreover, the quantum chemical calculations of the compounds have been performed using the density functional theory. It has been found that the calculated spectroscopic values are in a good agreement with experimental data.

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Infrared and Raman studies of [UO2(salen)(L)] (L=H2O and CH3OH)

Cited by 51 publications

References 14 publications

Spectroscopic, structural, thermal and antimicrobial studies of 4,6-bis (4-chlorophenyl)- 2-oxo-1,2-dihydropyridine-3-carbonitrile with some transition metals

Spectroscopic, structural, thermal and antimicrobial studies of 4,6-bis (4-chlorophenyl)- 2-oxo-1,2-dihydropyridine-3-carbonitrile with some transition metals

Spectroscopic, thermal analysis, and antimicrobial evaluation of new Y(III), Zr(IV), and U(VI) ibuprofen complexes

Spectroscopic Properties and Quantum Chemical Calculations of Novel Diimine Molecules and their Mononuclear Cu(II) Complexes

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