lobna.nassr

Lobna Abdel-Mohsen Ebaid Nassr

Professor - Head Of Chemistry Department- Director of Quality Management Unit - Faculty of Science - Sohag University

Faculty of science

Address: Chemistry Department - Faculty of Science - Sohag University

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Publications Which contain the keyword: complexes

New palladium (II) and silver (I) Schiff base complexes Promising antibiotic and anticancer agents

2018-11-26 08:20:45 Keywords DNA interaction, Antimicrobial activity, anticancer activity, complexes, Schiff base, VO(II), Pd (II),
New palladium (II) and silver (I) Schiff base complexes Promising antibiotic and anticancer agents
Some new complexes derived from Ag (I) and Pd(II) metal ions and HNA imine ligand (L) _i.e. _(2-[(6-Allylidene-2-hydroxy-cyclohexa-1,3-dienylmethylene)-amino]-benzoic acid) have been synthesized and characterized by elemental analyses, molar conductance, magnetic susceptibility measurements, IR, NMR and electronic spectral studies. Moreover, the stability constants of the synthesized complexes were determined spectrophotometrically. On the basis of molar conductance and elemental analyses the complexes ... Read more

La (III) and Ce (III) Complexes of Some Tri‐and Tetradentate N‐Naphthylideneamino Acids

2018-10-31 13:17:10 Keywords Naphthylideneamino, complexes,
La (III) and Ce (III) Complexes of Some Tri‐and Tetradentate N‐Naphthylideneamino Acids
The metal complexes of lanthanum(III) and cerium(III) with Schiff bases derived from the condensation of 2‐hydroxy‐1‐naphthaldehyde with _α_‐amino acids, viz. glycine, alanine, phenylalanine, valine, leucine and L‐glutamine, have been prepared and studied. The structures of these complexes are assigned on the basis of elemental analyses, molar conductance, IR and 1H NMR spectra and thermal analyses data. The results suggest that ... Read more

Synthesis, Characterization, and Electrochemical Studies of Ternary Complexes of Lanthanum (III) and Cerium (III) with Some Naphthylideneamino Acids and Imidazoles

2018-10-31 13:24:04 Keywords imidazoles, complexes,
Synthesis, Characterization, and Electrochemical Studies of Ternary Complexes of Lanthanum (III) and Cerium (III) with Some Naphthylideneamino Acids and Imidazoles
A new series of ternary lanthanium(III) and cerium(III) complexes containing Schiff bases derived from some amino acids, viz: glycine; alanine; phenylalanine; valine and leucine with 2-hydroxy-1-naphthaldehyde as primary ligands, and 1-methylimidazole & 1,2-dimethylimidazole as secondary ligands were synthesized. The complexes were characterized on the bases of microanalyses, electrical conductance, IR & 1H NMR spectra, thermal analysis and cyclic voltammetric data. ... Read more

Design, Physicochemical Studies and DNA Interaction of Some Complexes

2018-10-01 09:33:11 Keywords DNA interaction, complexes, Schiff bases, Antimicrobial activity,
Design, Physicochemical Studies and DNA Interaction of Some Complexes
In recent years, great interest has been focused on Fe(II) Schiff bases amino acids complexes as cytotoxic and antitumor drugs. Thus a series of new iron(II) complexes based on Schiff bases amino acids ligands have been designed and synthesized from condensation of 2-hydroxy-1-naphthaldehyde and 5-bromosalicylaldehyde (bs) with α-amino acids ((L-alanine (ala), L-phenylalanine (phala), L-aspartic acid (aspa), L-histidine (his) and L-arginine ... Read more

Diabetes Mellitus Therapy

2018-10-03 06:09:16 Keywords Therapy, Diabetes , complexes, vanadium,
Diabetes Mellitus Therapy
The concept of using metal ions for the remediation of diabetes generates from the report in 1899. A number of transitional and coordination compounds such as vanadium, chromium, manganese,cobalt, copper, zinc, tungsten and molybdenum have been suggested as possible adjuncts in the remediation of diabetes mellitus in vivoandin vitro. Metal compounds induce hypoglycemia by a wide diversity of mechanisms. Potential ... Read more

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

2018-09-11 15:03:04 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

The synthesis of CuO and NiO nanoparticles by facile thermal decomposition of metal-Schiff base complexes and an examination of their electric, thermoelectric and magnetic Properties

2018-09-03 09:31:48 Keywords semiconductor material, thermoelectric, complexes, Schiff base, magneticnanoparticles, NiO, CuO, IR, TGA,
The synthesis of CuO and NiO nanoparticles by facile thermal decomposition of metal-Schiff base complexes and an examination of their electric, thermoelectric and magnetic Properties
In this study, CuO and NiO NPs have been synthesized by facile thermal decomposition of Schiff base complexes and their physical properties have been examined. The synthesized CuO and NiO NPs are crystallized in polycrystalline monoclinic and cubic structures with average particle size 17 ± 0.4 and 62 ± 1 nm, respectively. The electrical conductivity measurements confirm that the conduction ... Read more

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