Synthesis, structural characterization and properties of some novel siloxane-based bis -Schiff base copper(II), nickel(II) and manganese(II) complexes

Vlad, Angelica; Avădanei, Mihaela; Shova, Sergiu; Cazacu, Maria; Zaltariov, Mirela‐Fernanda

doi:10.1016/j.poly.2018.02.029

Cited by 26 publications

(7 citation statements)

References 27 publications

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“…The third and fourth bands for 6 A 1g → 4 E g (G), 4 A 1g (G)( v 3 ), and 6 A 1g → 4 T 2g (D)( v 4 ) do not appear here because of the broaden of the bands. [ 63,65 ] The Mn 2+ complex had μ eff equal to 5.73 BM, consistent with five unpaired electrons system and close to high spin Mn 2+ ion (d 5 ). [ 66 ] In a sphere of tetrahedral symmetry of Co 2+ , the 4 F ground state is split into 4 A 2 , 4 T 2 , and 4 T 1 (F), and three spin‐allowed transitions, 4 A 2 → 4 T 2 ( v 1 ), 4 A 2 → 4 T 1 (F)( v 2 ), and 4 A 2 → 4 T 1 (P)( v 3 ), are anticipated.…”

Section: Resultsmentioning

confidence: 76%

“…4 T 2g (D) (v 4 ) do not appear here because of the broaden of the bands. [63,65] The Mn 2+ complex had μ eff equal to 5.73 BM, consistent with five unpaired electrons system and close to high spin Mn 2+ ion (d 5 ). [66] In a sphere of tetrahedral symmetry of Co 2+ , the 4 F ground state is split into 4 A 2 , 4 T 2 , and 4 T 1 (F), and three spin-allowed transitions, 4…”

Section: Electronic Absorption Spectra and Magnetic Moment Measuremmentioning

confidence: 81%

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Transition metal complexes derived fromN′‐(4‐fluorobenzylidene)‐2‐(quinolin‐2‐yloxy) acetohydrazide: Synthesis, structural characterization, and biocidal evaluation

El‐Saied

Shakdofa

Al‐Hakimi

et al. 2020

Applied Organom Chemis

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complexes of a synthetic novel hydrazone containing a quinoline moiety were prepared. The composition and structure of the prepared compounds were elucidated by spectral and analytical techniques. The results reveal that all complexes were formed in 1:1 mole ratio except Mn 2+ and Cu 2+ complexes (3) and (7), which were formed in 1 M:2 L mole ratio. It was also found that the ligand binds the metal ions via NO donor sites as a monobasic bidentate chelator in all complexes through the enolic carbonyl oxygen and azomethine nitrogen atoms. The electronic absorption spectra and magnetic moment data demonstrated square pyramidal and octahedral geometries for the VO 2+ and Ni 2+ complexes, respectively, while the other complexes adopted tetrahedral geometry. The thermal decomposition of the complexes was discussed in relation to structure. The thermal analysis data demonstrated that all complexes were decomposed in one, two, three or four stages starting with the dehydration process, removal of coordination water molecules or elimination of anions and ended with the formation of the metal oxide. The bactericidal activities of the prepared compounds demonstrated that hydrazone (1) exerted a highly inhibitory effect against B. subtilis while VO 2+ , Co 2+ , and Cu 2+ complexes (2), (4), and (7) showed an inhibitory effect against E. coli more than the tetracycline. Additionally, the inhibitory effect of the prepared compound against A. niger showed that the Cu 2+ complex (6) is the most active while the Ni 2+ , Cu 2+ , and Zn 2+ complexes (5-8) exhibited an extremely inhibitory effect against C. albicans.

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Section: Resultsmentioning

confidence: 76%

Section: Electronic Absorption Spectra and Magnetic Moment Measuremmentioning

confidence: 81%

Transition metal complexes derived fromN′‐(4‐fluorobenzylidene)‐2‐(quinolin‐2‐yloxy) acetohydrazide: Synthesis, structural characterization, and biocidal evaluation

El‐Saied

Shakdofa

Al‐Hakimi

et al. 2020

Applied Organom Chemis

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“…Imines derived from o-hydroxy aromatic carbonyls are of interest because of their ability to form an asymmetric intramolecular hydrogen bond between the oxygen atom of the hydroxyl group and the nitrogen atom of the imine moiety (Dominiak et al, 2003). This ability has a decisive impact on the biological and thermo-or photochromic properties of ohydroxy aromatic Schiff bases and makes them very useful compounds in chemistry, biochemistry, medicine, and technology (Vlad et al, 2018;Bouhidel et al, 2018;Faizi et al, 2020a,b). A very important issue is determining the positions of tautomeric equilibria in these compounds and various instrumental research techniques are used to provide insight into the structure of molecules of studied o-hydroxy Schiff bases (Wojciechowski et al, 2003;Faizi et al, 2020c,d).…”

Section: Chemical Contextmentioning

confidence: 99%

Crystal structure and Hirshfeld surface analysis of (E)-2-{[(2-iodophenyl)imino]methyl}-6-methylphenol

et al. 2020

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The title compound, C14H12INO, was synthesized by condensation of 2-hydroxy-3-methylbenzaldehyde and 2-iodoaniline, and crystallizes in the orthorhombic space group P212121. The 2-iodophenyl and benzene rings are twisted with respect to each other, making a dihedral angle of 31.38 (2)°. The molecular structure is stabilized by an O—H...N hydrogen bond, forming an S(6) ring motif. In the crystal, molecules are linked by C—H...π interactions, resulting in the formation of sheets along the a-axis direction. Within the sheets, very weak π–π stacking interactions lead to additional stabilization. The Hirshfeld surface analysis and fingerprint plots reveal that the crystal structure is dominated by H...H (37.1%) and C...H (30.1%) contacts. Hydrogen bonding and van der Waals interactions are the dominant interactions in the crystal packing. The crystal studied was refined as a two-component inversion twin.

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“…1–4 The use of azomethine linkers in conjugated structures has allowed the assembly of highly useful compounds. 5–9 The use of these compounds as photovoltaic materials has increased due to the fact that the electron transfer is good and the azomethine group provides the electron donor. 10–12…”

Section: Introductionmentioning

confidence: 99%

Theoretical, spectroscopical, and experimental investigations of small azomethine molecules for organic solar cells

Göreci

2020

Journal of Chemical Research

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Small azomethine molecules ( 4,4′-bis((2-hydroxy-4-octyloxyphenyl)methylimino)diphenylmethane (BP-DPM) and 4,4′-bis((2-hydroxy-4-octyloxyphenyl)methylimino)diphenyl ether (BP-DPE)) for photovoltaic applications were synthesized by condensation of appropriate arylaldehydes and arylendiamines and characterized using Fourier-transform infrared spectroscopy, 1H NMR, 13C NMR, and liquid chromatography–mass spectrometry. Azomethine molecules are additives in organic solar cells. The effect of a possible energy transfer between BP-DPE and P3HT on the photovoltaic performance of devices employing ternary blends of BP-DPE:P3HT: phenyl-C61-butyric acid methyl ester (PCBM) was investigated by absorption and emission spectra. The devices employing BP-DPE:P3HT:PCBM with 1:4 ratio exhibited a Jsc of 4.2 mA cm−2, Voc of 575 mV, and FF of 0.27 which led to a power conversion efficiency (PCE) of 0.65%. In addition, density functional theory calculations (DFT/B3LYP/6-31G(d)) were used to determine the optimized molecular geometry, highest occupied molecular orbital–lowest unoccupied molecular orbital energies, electronic structures, and the molecular electrostatic potential surfaces of the molecules.

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Synthesis, structural characterization and properties of some novel siloxane-based bis -Schiff base copper(II), nickel(II) and manganese(II) complexes

Cited by 26 publications

References 27 publications

Transition metal complexes derived fromN′‐(4‐fluorobenzylidene)‐2‐(quinolin‐2‐yloxy) acetohydrazide: Synthesis, structural characterization, and biocidal evaluation

Transition metal complexes derived fromN′‐(4‐fluorobenzylidene)‐2‐(quinolin‐2‐yloxy) acetohydrazide: Synthesis, structural characterization, and biocidal evaluation

Crystal structure and Hirshfeld surface analysis of (E)-2-{[(2-iodophenyl)imino]methyl}-6-methylphenol

Theoretical, spectroscopical, and experimental investigations of small azomethine molecules for organic solar cells

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