Novel platinum complexes with schiff bases and α-Dioximes, their physico-chemical and biological study

In our research project we prepared the following platinum(II) complexes with Schiff bases and -dioximes, such as [Pt(ketone)2A(L2)], (ketone: 2-heptanone, 2-octanone, 3-octanone; A: hydrazine, phenylhydrazine, o-phenylene-diamine; L: 1-naphthylamine, 2-aminopyrimidine, 2-methylimidazole, 2-amino-4-methylpyridine) and [Pt(DioxH)2L2], (DioxH2: methyl-phenyl-dioxime, butyl-methyl-dioxime; L: 1-naphthylamine, 2-methylimidazole, 2-amino-4-methylpyridine, lepidine, 2-methylpyridine, m-toluidine, dicyclohexylamine, 4-isopropylamine, cyclohexylamine), by the reaction of PtCl2 in suitable solvent. After a short bibliographical survey, involving the classification and evolution of platinum complexes with possible applications, we analyzed their physico-chemical properties using FTIR, Raman, NMR, UV-VIS spectroscopy, powder X-ray diffraction (XRD), mass spectrometry, thermal analysis (TG, DTG, DTA) and SEM. We also studied the antibacterial effect of complexes on different strains of bacteria. This class of compounds has relevance in biochemistry, some of them are antibacterial agents and potential anti-tumor drugs

Novel copper complexes with glyoximes, amines, schiff bases, semi-and thiosemicarbazones ; synthesis and physico-chemical analysis

In our research project new copper(II) complexes were synthesized with -dioximes, amines, Schiff bases, semi- and thiosemicarbazones such as [Cu(DioxH)2L2], (DioxH2: methyl-butylglyoxime, ethyl-butyl-glyoxime, methyl-phenyl-glyoxime; L: diphenyl-amine, 2-methylimidazole, dibutyl-amine, 2-amino-4-methylpyridine, imidazole, 1-aminonaphthaline), [Cu(octan-2-one)2AL2], (A: hydrazine, phenylhydrazine, o-phenylene-diamine; L: 3-amino1H-1,2,4-triazole, 2-aminopyrimidine, 2-methylimidazole), [Cu(ketone-SC)2], [Cu(ketoneTSC)2], (ketone: propiophenone, butyrophenone; SC: semicarbazone; TSC: thiosemicarbazone), by the reaction of copper(II)-acetate in suitable solvent. After a short bibliographical survey, involving the classification and evolution of copper complexes with possible applications, we analyzed their physicochemical properties using FTIR, Raman, ESR, UV-VIS, powder X-ray diffraction (XRD), mass spectrometry, thermal analysis (TG, DTG, DTA) and SEM. The importance of this class of compounds lies in biochemistry as some of them are antibacterial agents and potential anti-tumour drugs

The Effect of Ni2+ Ions Substitution on Structural, Morphological, and Optical Properties in CoCr2O4 Matrix as Pigments in Ceramic Glazes

The structural, morphological, and optical properties of Ni2+ ions substitution in CoCr2O4 matrix as ceramic pigments were investigated. The thermal decomposition of the dried gel was performed aiming to understand the mass changes during annealing. The X-ray diffraction (XRD) studies reveal a spinel-type Face–Centered Cubic structure and a secondary Cr2O3 phase when x ≤ 0.75 and a Body–Centered Tetragonal structure when x = 1. Fourier Transform Infrared Spectroscopy (FT–IR) indicated two strong absorption bands corresponding to the metal–oxygen stretching from tetrahedral and octahedral sites, characteristic of spinel structure. Ultraviolet–Visible (UV–Vis) spectra exhibited the electronic transitions of the Cr2+ Cr3+ and Ni2+ ions. From the UV–Vis data, the CIE color coordinates, (x, y) of the pigments were evaluated. The morphology was examined by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) showing the agglomeration behavior of the particles. The stability, coloring properties and potential ceramic applications of studied pigments were tested by their incorporation in matte and glossy tile glazes followed by the application of obtained glazes on ceramic tiles. This study highlights the change in pigment color (from turquoise to a yellowish green) with Ni2+ ions substitution in the CoCr2O4 spinel matrix