Reaching the heights: The journal during the editorship of Dr R K Puri (March 1990–1994)

Dubey, AP

doi:10.1007/s13312-013-0226-6

Cited by 6 publications

(7 citation statements)

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“…The imine stretch vibration was, however, observed at lower frequencies in the Cu(II) chelates than in the free ligands (1631-1588 cm -1 to 1624-1584 cm -1 ), indicating coordination of the Schiff base ligands via the imine nitrogen. 24,35 The higher ν C=N value for the ligand L 2 complex indicates the possibility of M → L π bonding; which increases the bond order and consequently leads to a higher frequency of absorption. In addition, the ν C-O values for the complexes undergo a blue shift, 1284-1258 cm -1 to 1328-1284 cm -1 ,in all the complexes, 28,34 implying coordination via the hydroxyl OH of the Schiff base ligands.…”

Section: Infrared Studymentioning

confidence: 99%

“…22,23 The presence of the heterocyclic ring in the Schiff base moiety lends additional stability to the structure of Schiff base metal complexes. This extra stability is possible with aminopyridine-derived Schiff base ligands depending on the position of the imine-N relative to the azine--N. Most ortho-hydroxy Schiff bases coordinate as monobasic bidentate ligands via the imine-N and the phenoxide ion; 24,25 only a few cases of neutral coordination of salicylaldimines have been reported. 26 It is noteworthy, therefore, to discuss this uncommon coordination mode as observed in the Cu(II) complexes of some aminopyridine derived Schiff base ligands.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and biological study of Cu(II) complexes of aminopyridine and (aminomethyl)pyridine Schiff bases

Sobola

Watkins

Brecht

2018

JSCS

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The synthesis, characterization and antimicrobial activity determination of some aminopyridine-and (aminomethyl)pyridine-salicylaldimine copper(II) complexes were realized. The ligands, L 1-L 6 , were prepared by condensing salicylaldehyde and o-vanillin with 2-and 3-amino-and (aminomethyl)pyridine, respectively. The complexes were characterized by micro-analytical, electronic, infrared and conductivity data. The structures of the Schiff base ligands were further confirmed from 1 Hand 13 C-NMR spectral data. This study established that salicylaldimine ligands could coordinate as neutral species via the imine-N and the undeprotonated phenolic-O. The complexes have the molecular formula: [CuLCl], [Cu(LH) 2 Cl 2 ]•xH 2 O or [Cu(LH)Cl(H 2 O)]Cl. The X-ray crystal structure of [CuL 6 Cl] indicated a square planar geometry with the Schiff base ligand coordinated to the Cu(II) ion as a tridentate monobasic, N 2 O, ligand. The crystals crystallized in a monoclinic system with P2 1 /c space group. All the ligands and their Cu(II) complexes were screened for their antimicrobial activity against Staphylococcus aureus subsp. aureus ATCC ® 6538™  , Bacillus subtillis subsp. spizizenii ATCC ® 6633™  , Escherichia coli ATCC ® 8739™  and Candida albicans ATCC ® 2091™  using agar diffusion and broth dilution techniques. The presence of the methoxyl group enhanced the antimicrobial activity of the salicylaldimine Schiff base ligands.

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Section: Infrared Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and biological study of Cu(II) complexes of aminopyridine and (aminomethyl)pyridine Schiff bases

Sobola

Watkins

Brecht

2018

JSCS

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“…Otherwise, some extractions are time-consuming and when organic samples are treated, the residual organic matter in the aqueous extractor is not negligible and consequently affects electrochemical determinations. 28 Iodine monochloride was extensively used for lead-alkyl extraction from gasolines and the use of stripping voltammetry for inorganic lead determination was performed. 23 Removal of such species was also attained by organic solvent extraction.…”

Section: Extraction Methodsmentioning

confidence: 99%

Sample Preparation Techniques for the Electrochemical Determination of Metals in Environmental and Food Samples

Muñoz

Almeida

Angnes

2013

Reference Module in Chemistry, Molecular Sciences and Chemical Engineering

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“…The other important peaks are due to the formation of various fragments, 28 The other important peaks are due to the formation of various fragments, 28 …”

Section: Fab Mass Spectramentioning

confidence: 99%

Synthesis and characterization of oxidomolybdenum(V) and dioxidomolybdeum(VI) complexes derived from isonicotinoyl(2-hydroxy-3-methoxybenzylidene)hydrazide

Nair

Thankamani

2011

JSCS

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Several novel complexes of oxomolybdenum(V) and dioxomolybdenum(VI) were synthesized with the Schiff base, N'-(2-hydroxy-3-methoxybenzylidene)isonicotinohydrazide (HL) derived from 3-methoxysalicylaldehyde and isonicotinohydrazide. The complexes were characterized by elemental analyses, molar conductance and magnetic susceptibility, as well as IR, 1 H-NMR, FAB mass and UV-Vis spectral studies. The complexes have the general formulae [MoO(L)XCl] and [MoO 2 (L)X], where X=NO 3 or ClO 4 . The IR spectra of these complexes indicate that the ligand HL acts as a monoanionic tridentate chelating agent. The spectra indicate the monodentate mode of coordination for the nitrate and perchlorate groups. The X-ray diffraction studies of [MoO(L)NO 3 Cl] correspond to an orthorhombic crystal lattice with unit cell dimensions a = 15.49 Å, b = 12.44 Å and c = 10.11 Å. All the complexes were found to have distorted octahedral geometry. Thermal studies of the complex [MoO 2 (L)NO 3 ] showed that it was stable up to 240 °C, above which it started to decompose. The optimized geometry of ligand and one of its complexes, [MoO(L)NO 3 Cl], have been obtained by a molecular mechanics method. Antibacterial studies of the present complexes show that the oxomolybdenum(V) complexes were more potent bactericides than the ligand and the dioxomolybdenum(VI) complexes.

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Reaching the heights: The journal during the editorship of Dr R K Puri (March 1990–1994)

Cited by 6 publications

References 0 publications

Synthesis, characterization and biological study of Cu(II) complexes of aminopyridine and (aminomethyl)pyridine Schiff bases

Synthesis, characterization and biological study of Cu(II) complexes of aminopyridine and (aminomethyl)pyridine Schiff bases

Sample Preparation Techniques for the Electrochemical Determination of Metals in Environmental and Food Samples

Synthesis and characterization of oxidomolybdenum(V) and dioxidomolybdeum(VI) complexes derived from isonicotinoyl(2-hydroxy-3-methoxybenzylidene)hydrazide

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