ahmedabudief

Prof. Ahmed Mohamed Abu-Dief

Professor - Professor of Physical and Inorganic Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street

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Publications Which contain the keyword: NMR


Some New Cr (III)  Mononuclear Complexes encompassing Tri- and Tetra-dentate Imine Ligands: Synthesis, Spectral Characterization and High Selectivity in Catalytic Oxidation of Benzyl alcohol
IN THE PRESENT CONTRIBUTION, SOME NOVEL CR (III) COMPLEXES WERE SYNTHESIZED FROM TRI- AND TETRA-DENTATE IMINE LIGANDS DERIVED FROM 3-ETHOXYSALICYLALDEHYDE OR 2-HYDROXYNAPHTHALDEHYDE WITH 2-AMINOPHENOL OR O-PHENYLENEDIAMINE. ALL THE PREPARED LIGANDS WERE AUTHENTICATED BY 1H, 13C NMR AND IR SPECTRA. INTERACTION OF THE SYNTHESIZED LIGANDS WITH CHROMIUM NITRATE PRODUCED THREE NOVEL CR(III) COMPLEXES. THE STRUCTURE OF THE PREPARED CR (III) COMPLEXES ... Read more

Approach to Synthesis, Characterization, Antimicrobial Activities and Catalytic Activity of Some Transition Metal Complexes Containing Biologically Active Asymmetrical Tetradentate Ligands.
AIR AND MOISTURE STABLE COORDINATION COMPOUNDS OF FIRST TRANSITION METALS SUCH AS CO(II), NI(II) AND CU(II) WITH NEWLY DESIGNED SCHIFF BASE (BSIPH) INCORPORATING 5-BROMOSALICYALDEHYDE WITH ISATIN AND 4-NITRO-O-PHENYLENE DIAMINE HAVE BEEN SYNTHESIZED TO ELUCIDATE THE STRUCTURE OF METAL COMPLEXES. THEY ARE CHARACTERIZED BY ELEMENTAL ANALYSES, INFRARED, 1HNMR, 13CNMR, THERMAL ANALYSIS, UV-VISIBLE, CONDUCTIVITY AND MAGNETIC SUSCEPTIBILITY MEASUREMENTS. THE RESULTS SUGGEST THAT ... Read more

2018-11-21 09:30:25 Keywords VO(II), Anti cancer, Antimicrobial, NMR, IR, TGA, Imine complexes,
Synthesis, Spectral Characterization, DNA Interaction, Antimicrobial  and Anticancer Activities  of Some Tri- and Tetra-dentate imine VO(II) Complexes
The new imine ligands were synthesized by the condensation reaction between 2-hydroxynaphthaldehyde or 3-ethoxysalicylaldehyde and _o_-phenylenediamine s in 1:1 molar ratio. The ligands react with vanadyl acetylacetonate in 1:1 molar ratio to give distorted and square pyramidal geometry for tri- and tetra-dentate imine complexes, respectively. All the complexes are non– hygroscopic in nature and stable to the atmosphere. The synthesized ... Read more

Design, Synthesis, anticancer activity and molecular docking studies on a series of VO(II), Cr (III), Mn(II) and Ni(II) Mononuclear Chelates incorporating Quaridentate imine ligand as antitubulin agents
The present study was conducted to synthesis of some new imine Cr(III), VO(II), Mn(II) and Ni(II) complexes derived from the condensation of 2-amino phenol with 2-hydroxynapthaldehyde were synthesized. The prepared HNPN imine ligand was analyzed by its melting point, IR, 1H NMR and 13C NMR spectroscopies. The investigated HNPN imine complexes were characterized by elemental analysis, FT IR, Uv-vis and ... Read more

Synthesis, characterization, DNA cleavage and antimicrobial activity of Schiff base transition metal complexes containing heterocyclic ligand
SOME NOVEL SCHIFF BASE METAL COMPLEXES OF CU(II), CO(II), NI(II) AND FE(II) DERIVED FROM 2-AMINO-3-HYDROXYPYRIDINE AND 4-NITROBENZALDEHYDE WERE SYNTHESIZED. THESE COMPOUNDS WERE CHARACTERIZED BY ELEMENTAL ANALYSIS, MOLAR CONDUCTANCE, MAGNETIC SUSCEPTIBILITY, THERMAL MEASUREMENTS, INFRARED AND ULTRAVIOLET–VISIBLE SPECTRA. THE SCHIFF BASE AND METAL COMPLEXES DISPLAYED GOOD ACTIVITY (AGAINST THE BACTERIA, _ESCHERICHIA COLI,__SERRATIA MARCESCENCE_AND_MICROCCUS LUTEUS_, AND THE FUNGI _ASPERGILLUS FLAVUS_, _GETRICHM CANDIDUM _AND ... Read more

Synthesis, theoretical investigations, biocidal screening, DNA binding, in vitro cytotoxicity and molecular docking of novel Cu (II), Pd (II) and Ag (I) complexes
Three new Cu(II), Pd(II) and Ag(I) complexes with bi-dentate Schiff base ligand "HL" namely 2-[(4-Chloro-benzylidene)-amino]-phenol were synthesized. The stoichiometric ratios and physicochemical properties of these complexes were determined using elemental analyses (C, H, and N), magnetic measurements, IR, UV-Vis spectra, molar conductivity and thermal analyses. The results revealed that the metal ions coordinated with ligand HL through azomethine nitrogen and ... Read more

Nano structure Iron (II) and Copper (II) Schiff base complexes of a NNO-tridentate ligand as new antibiotic agents: spectral, thermal behaviors and DNA binding ability
Complexes of Fe (II) and Cu (II) with a tridentate Schiff base, 2-((z)-(pyridine-2-ylimino) methyl) naphthalene1-ol derived from 2-hydroxy-1-napthaldehyde and 2-aminopyridine were synthesized. Both the ligand and its complexes were characterized on the basis of microanalysis, melting point, 1H and 13CNMR, molar conductivity, thermal analysis, IR and UV/Vis spectral studies. From analytical data, the stoichiometry of the complexes was found to ... Read more

2018-09-16 13:48:24 Keywords DNA interaction, Antimicrobial, TEM, TGA, amino acid, Azomethine, IR, NMR,
Recent advances in synthesis, characterization and biological activity of nano sized Schiff base amino acid M (II) complexes
Azomethine amino ligands derived from the condensation of 3-methoxysalicylaldehyde (MS) or 4-diethylaminosalicylaldehyde (DS) with α-amino acids (L-phenylalanine (P) and DL-tryptophan (T)) were synthesized. All ligands were analyzed by IR, 1H NMR, 13C NMR and their melting points. Interaction of the obtained azomethine amino ligands with metal salts produced novel nano sized Fe (II) and Cu (II) complexes. The isolated complexes ... Read more

Development, structural investigation, DNA binding, antimicrobial screening and anticancer activities of two novel quari-dentate VO(II) and Mn (II) mononuclear complexes
Two novel VO(II) and Mn(II) imine chelates derived from the condensation of o-phenylenediamine (PN) with 3-ethoxysalicylaldehyde(ES) were synthesized. The prepared ESPN imine ligand and its chelates were investigated _via_ different analytical and physicochemical tools. Correlation between all the obtained results, the parent ligand behaves as tetra-dentate ONNO ligand and coordinates to Mn(II) and VO(II), in octahedral and square pyramidal geometry, ... Read more

Corrosion inhibition of carbon steel pipelines by some novel Schiff base compounds during acidizing treatment of oil wells studied by electrochemical and quantum chemical methods
Three novel Schiff bases compounds were prepared and their structures were characterized by X-ray, 13C-NMR, 1H-NMR, mass, UV–Vis, FT-IR, spectral data and elemental analyses. The corrosion inhibition of the investigated inhibitors towards carbon steel in 15% HCl was investigated by using electrochemical measurements (EIS, LPR corrosion rate and Tafel plots), SEM, EDX and quantum chemical methods. The results showed that, ... Read more