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Articles by P. P. Corbi
Total Records ( 4 ) for P. P. Corbi
  P. P. Corbi , A. C. Massabni , L. P. B. Sabeh and C. M. Costa-Neto
  Synthesis and characterization of a new Pt(II) complex with the amino acid L-alliin (S-allyl-L-cysteine sulfoxide, C6H11NO3S) are described. Elemental and mass spectrometric analyses of the solid complex are consistent with [PtCl2(alliin)], or [PtCl2(C6H11NO3S)]. 13C nuclear magnetic resonance (NMR), [1H-15N] two dimensional (2D) NMR and infrared spectroscopy indicate coordination of the ligand to Pt(II) through the N and S atoms. The complex is very soluble in dimethyl sulfoxide. Biological analysis for evaluation of a potential cytotoxic effect of the complex was performed using HeLa cells derived from human cervical adenocarcinoma. The complex presented moderate cytotoxic activity, inducing about 40% cell death at a concentration of 400 μmol · L-1.
  P. P. Corbi , F. Cagnin and A. C. Massabni
  Chemical and spectroscopic studies of a new palladium(II) N-acetyl-L-cysteine complex are described. Elemental analyses for the solid complex are consistent with the formula [Pd(C5H8NO3S)2] · H2O or [Pd(NAC)2] · H2O. Solid-state 13C nuclear magnetic resonance (NMR), UV-Visible (UV-Vis) and infrared (IR) spectroscopic analyses are consistent with coordination of the ligand to palladium(II) through the nitrogen and sulfur atoms in a square-planar geometry. Thermogravimetric and differential thermal analyses confirmed the composition; final residue was identified as metallic palladium.
  P. P. Corbi , F. Cagnin and A. C. Massabni
  Synthesis and spectroscopic studies in the solid-state of a platinum(II) complex with N-acetyl-L-cysteine are described. Elemental analyses are consistent with composition Pt2(C5H8NO3S)4 · 3H2O. Solid-state 13C NMR, infrared, and U-Vis spectroscopic results are consistent with coordination of the ligand to platinum(II) through sulfur. Thermal analyses confirmed water in the complex composition. Final residue of the thermal treatment was identified by powder X-ray diffractometry as metallic platinum.
  P. P. Corbi , F. A. Quintao , D. K. D. Ferraresi , W. R. Lustri , A. C. Amaral and A. C. Massabni
  A new gold(I) complex with N-acetyl-L-cysteine was synthesized and characterized by chemical and spectroscopic techniques. The elemental and thermal analyses of the solid compound fit to the composition AuC5H8NO3S · 0.75H2O. Solid-state 13C-nuclear magnetic resonance (SSNMR) and infrared (IR) analyses indicate the coordination of the ligand to Au(I) through sulfur. The insolubility of the complex in both polar and non-polar solvents supports a polymeric structure. The antibacterial activity of the complex was evaluated by antibiogram assays using the disc diffusion method. The compound showed effective antibacterial activity against Staphylococcus aureus (Gram positive) and Escherichia coli (Gram negative) bacterial cells.
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