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Articles by Mehmet Tumer
Total Records ( 2 ) for Mehmet Tumer
  Mehmet Tumer , Eyup Akgun , Sevil Toroglu , Ahmet Kayraldiz and Lale Donbak
  We have synthesized the three Schiff-base ligands H2L1-H2L3 and their CoII, FeIII and RuIII metal complexes. All compounds have been characterized by analytical and spectroscopic methods. Oxidation of cyclohexane has been done by the metal complexes in CH3CN using H2O2 and/or t-butylhydroperoxide (TBHP) as a co-catalyst. The keto-enol tautomeric forms of the ligands have been studied in polar and non-polar organic solvents. Electrochemical properties of the complexes have been studied at different scan rates. Thermal studies were carried out for the compounds. The ligands H2L1-H2L3 were mutagenic on Salmonella Typhimurium TA 98 strain in the presence and/or absence of S9 mix. While the ligands H2L1 and H2L2 showed mutagenic activity on the strain TA 100 with and without S9 mix, the ligand H2L3 was not mutagenic for TA 100. Antimicrobial activity studies of the compounds have also been carried out.
  Harun Muslu , Aysegul Golcu , Mehmet Tumer and Mehmet Ozsoz
  Complexes of pefloxacin (PEF), with Cu(II), Zn(II), Pt(II), Ru(III), and Fe(III) have been synthesized and characterized by spectroscopic techniques involving UV-Vis, IR, 1H-HMR, CHN elemental analysis, electrochemical, and thermal behaviors. The electrochemical properties of all complexes were investigated by cyclic voltammetry (CV) using a glassy carbon electrode. The biological activities of the complexes have been evaluated by examining their ability to bind to calf thymus DNA (CT-DNA) with UV spectroscopy and CV. UV studies of the interaction of the complexes with DNA show that these compounds can bind to CT-DNA and the binding constants have been calculated. The cyclic voltammograms of the complexes in the presence of CT-DNA show that the complexes can bind to CT-DNA by intercalative and electrostatic binding. The antimicrobial activities of these complexes have been evaluated against three Gram-positive and four Gram-negative bacteria. Antifungal activities against two different fungi have been evaluated and compared with pefloxacin as reference. Almost all complexes show excellent activity against all bacteria and fungi.
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