ahmedabudief

Dr. 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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A robust synthesis and characterization of superparamagnetic CoFe2O4 nanoparticles as an efficient and reusable catalyst for green synthesis of some heterocyclic rings

2016 | Keywords superparamagnetic materials, non-chromatographic methods, pyrrole, tetrahydropyridines, TEM, hydrothermal synthesis, magnetic CoFe2O4nanoparticles, EDAX, XRD,
A robust synthesis and characterization of superparamagnetic CoFe2O4 nanoparticles as an efficient and reusable catalyst for green synthesis of some heterocyclic rings
A robust synthesis for magnetic CoFe2O4 nanoparticles via a hydrothermal technique was investigated. The prepared magnetic nanoparticles were characterized using powder X‐ray diffraction, scanning, transmission and high‐resolution transmission electron microscopies, energy‐dispersive X‐ray and infrared spectroscopies, thermogravimetric analysis and vibrating sample magnetometry. Based on the obtained data, the prepared powder was composed of ultrafine particles in nanometer size range with highly ... Read more

Some new nano-sized Fe(II), Cd(II) and Zn(II) Schiff base complexes : Sonochemical synthesis, characterization, DNA interaction, in vitro antimicrobial and anticancer activities

2016 | Keywords Cytotoxic activity, Metal oxides, nanoparticles, Antimicrobial activity, DNA interaction, Sonochemical synthesis,
Some new nano-sized Fe(II), Cd(II) and Zn(II) Schiff base complexes : Sonochemical synthesis, characterization, DNA interaction, in vitro antimicrobial and anticancer activities
The complexes of Fe(II), Cd(II) and Zn(II) with Schiff base derived from 2-amino-3-hydroxypyridine and 3-methoxysalicylaldehyde have been prepared. Melting points, decomposition temperatures, Elemental analyses, TGA, conductance measurements, infrared (IR) and UV–Visible spectrophotometric studies were utilized in characterizing the compounds. The UV–Visible spectrophotometric analysis revealed 1:1 (metal-ligand) stoichiometry for the three complexes. In addition to, the prepared complexes have been used ... Read more

Magnetic NiFe2O4 nanoparticles: efficient, heterogeneous and reusable catalyst for synthesis of acetylferrocene chalcones and their anti‐tumour activity

2016 | Keywords anti-tumour activity, chalcone derivatives, acetylferrocene, recovered catalyst, efficient catalyst , magnetic NiFe2O4nanoparticles, TEM, SEM-EDX,
Magnetic NiFe2O4 nanoparticles: efficient, heterogeneous and reusable catalyst for synthesis of acetylferrocene chalcones and their anti‐tumour activity
A robust synthesis of magnetic NiFe2O4 nanoparticles via a hydrothermal technique was investigated. The prepared magnetic NiFe2O4 nanoparticles were characterized using powder X‐ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy (TEM), high‐resolution TEM, energy‐dispersive X‐ray spectroscopy, thermogravimetric analysis, infrared spectroscopy and vibrating sample magnetometry. XRD and TEM analyses confirmed the formation of single‐phase ultrafine nickel ferrite nanoparticles with highly ... Read more

Sonochemical synthesis, DNA binding, antimicrobial evaluation and in vitro anticancer activity of nano-sized Cu(II), Co(II) and Ni(II) chelates as precursors for metal oxides

2016 | Keywords sonochemistry, Synthesis, thermal analyses, Antimicrobial activity, DNA interaction, Cytotoxic activity, nanoparticles, IR, NMR, TGA,
Sonochemical synthesis, DNA binding, antimicrobial evaluation and in vitro anticancer activity of nano-sized Cu(II), Co(II) and Ni(II) chelates as precursors for metal oxides
Three new nano sized Cu(II), Co(II) and Ni(II) complexes of imine ligand derived from the condensation of 2-amino-3-hydroxypyridine and 3-methoxysalicylaldehyde have been prepared and investigated using various chemical techniques such as NMR, elemental analysis, molar conductance, IR, electronic spectra, TGA and magnetic momentmeasurements. The obtained chemical analysis data showed that the synthesis of 1:1 (metal:ligand) ratio and octahedral geometry was ... Read more

Functionalization of magnetic Nano Particles: synthesis, characterization and their Application in water purification

2016 | Keywords Sonochemical, Hydrothermal, Thermal Decomposition, Heavy metals, Wastewater Treatment, magneticnanoparticles,
Functionalization of magnetic Nano Particles: synthesis, characterization and their Application in water purification
Contamination of fresh and marine sediments and water environments by oil spills, urban runoffs, industrial and domestic effluents is demonstrating to be of critical concern as the presence of contaminants affects aquatic organisms and can quickly disperse to large as highlighted by the recent Gulf oil spill disaster. Polycyclic aromatic hydrocarbons (PAHs), Poly chlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT) and heavy ... Read more

Some new nano-sized Cr(III), Fe(II), Co(II), and Ni(II) complexes: Structural characterization, electrochemical, antioxidant, antimicrobial, antiviral assessment and DNA interaction

2016 | Keywords NMR, TGA, IR, DNA interaction, Antiviral activity, Antimicrobial activity, Cyclic voltammetry, Nano-sized complexes, Antioxidant activity, CT-DNA,
Some new nano-sized Cr(III), Fe(II), Co(II), and Ni(II) complexes: Structural characterization, electrochemical, antioxidant, antimicrobial, antiviral assessment and DNA interaction
To estimate the biological preference of synthetic small drugs towards DNA target, new metal based chemotherapeutic agents of nano-sized Cr(III), Fe(II), Co(II) and Ni(II) Schiff base complexes having N,N,O donor system were synthesized and thoroughly characterized by physic-chemical techniques. The redox behavior of the Cr(III), Fe(II) and Co(II) complex was investigated by electrochemical method using cyclic voltammetry. IR results proven ... Read more

Some New Nano-sized Mononuclear Cu(II) Schiff Base Complexes: Design, Characterization, Molecular Modeling and Catalytic Potentials in Benzyl Alcohol Oxidation

2016 | Keywords TOF, TON, IR, TGA, Hydrogen peroxide, Catalytic activity, Density Functional Theory, Benzyl alcohol, TEM, Cu(II) Schiff base complexes, NMR,
Some New Nano-sized Mononuclear Cu(II) Schiff Base Complexes: Design, Characterization, Molecular Modeling and Catalytic Potentials in Benzyl Alcohol Oxidation
In the present contribution, some novel Cu(II) complexes were synthesized from tri- and tetradentate imine ligands. All the prepared compounds were elucidated by different physicochemical methods. Density Functional Theory calculations were carried out to explain the equilibrium geometry of the bsisnph and npisnph ligands and their Cu(II) complexes. Interaction of the synthesized ligands with Cu(II) affords nano-sized particles via TEM. ... Read more

Effect of chromium substitution on the structural and magnetic properties of nanocrystalline zinc ferrite

2016 | Keywords XRD, SEM, TEM, Nano structures, Chemical synthesis, EDAX, Rietveld analysis, Magnetometer,
Effect of chromium substitution on the structural and magnetic properties of nanocrystalline zinc ferrite
Single-phase Cr doped zinc ferrites have been synthesized by hydrothermal method. The crystal structure, microstructure, crystallite size and distribution, composition and magnetic properties of the synthesized nanoparticles were determined using X-ray powder diffraction, electron microscopies and vibrating sample magnetometry. Powders are composed of ultrafine spherical nanoparticles with a highly homogeneous elemental composition. The nanoparticles have partially inversed cubic spinel structure ... Read more

Synthesis, structure elucidation, biological screening, molecular modeling and DNA binding of some Cu(II) chelates incorporating imines derived from amino acids

2016 | Keywords Amino acids, Imine, Molecular modeling, Antimicrobial, Antiviral, DNA, IR, TGA, complexes,
Synthesis, structure elucidation, biological screening, molecular modeling and DNA binding of some Cu(II) chelates incorporating imines derived from amino acids
Three tridentate Schiff bases amino acids were prepared by direct condensation of 3-methoxysalicylaldehyde (MS) or 4-diethylaminosalicylaldehyde (DS) with α-amino acid ligands [l-phenylalanine (P), l-histidine (H) and DL-tryptophan (T)]. The prepared Schiff bases amino acids were investigated by melting points, elemental analysis, 1HNMR and 13CNMR, IR, UV–Vis spectra, conductivity and magnetic measurements analyses. Subsequently, copper was introduced and Cu(II) complexes formed. ... Read more

Removal of Toxic Pb(II) Ions from Aqueous Solution by Nano Sized Flamboyant Pod (Delonix regia)

2016 | Keywords TEM, XRD, Removal, Lead, Biosorbent, Kinetic parameters, Biosorption capacities, Delonix regia pod,
Removal of Toxic Pb(II) Ions from Aqueous Solution by Nano Sized Flamboyant Pod (Delonix regia)
The removing of toxic heavy metals from aqueous solution by agricultural biosorbents was investigated by studying the effect of nano sized (Delonix regia) and chemically modified biosorbent citric acid Delonix regia (CADR) for removing of Pb2+ ions. TEM, XRD and EDS, FT-IR, SEM methods were used for characterizing the biosorbent(Delonix regia). The effect of contact time, pH,temperature, dosage of biosorbent, ... Read more