In this article, a synthesized ligand [(1-phenyl-2-pyrazolin-5-one) azo (6-bromo-2-hydroxynaphthalen-1-yl)] has employed for preparing three new complexes of Co(II), Ni(II) and Cu(II). The new azo ligand (PABH) has analyzed by Micro Elemental Analysis (CHNO), UV-visible, Fourier Transform infrared (FTIR) approaches, 1 H, 13 C-NMR spectroscopy and mass spectroscopy. The consequence has specified that the ligand was represented as N,N,O-tridentate. The preparing of complexes has accomplished after fixing the finest concentration and pH values. UV-Vis spectra of these complexes solutions have been examined for a range of pH (5-9) and concentration (1×10 -4 -5×10 -4 ) Molar that comply with Lambert-Beers law. A stoichiometry of the complexes has comprehended in relation to mole ratio which has investigated from a spectroscopic technique. The ratio of metal: ligand was achieved with (1:2) for all complexes. The metal ions complexes were characterized by FTIR, UV-Visible, molar conductance, atomic absorption, magnetic susceptibility and elemental analysis CHNO techniques. From the results of physico-chemical and spectral techniques, octahedral geometry has been proposed for these metal complexes. All these compounds were evaluated against two kinds of human pathogenic bacteria such as Staphylococcus aureus (Gram Positive) and Escherichia coli (Gram negative).

Addition chloro acetyl isothiocyanate (C3H2ClNOS) with 3-Aminoaceto phenone (C8H9NO) to prepare a fresh Ligand [N-(3-acetyl phenyl carbamothioyl)-2-chloroacetamide](L). The ligand (L) behaves as bidentate coordinating through O and S donor with metal ions, the general formula of all complexes [M(L)2(Cl)2](M+2 = Manganese(II), Cobalt(II), Cadmium(II) and Mercury(II)). Compounds were investigation by Proton-1, Carbon -13 NMR spectra (ligand (L) only), Element Microanalysis for C, N, H, O, S, Fourier-transform infrared, UV visible, Conductance, Magnetic susceptibility and Atomic Absorption (A.A). Based on spectral data, complexes appear octahedral geometry. The anti-bacterial activity of the complexes against two type of bacterial was higher than for free ligand.

The leaf extract of the plant Leucaena leucocephala was used in this research to synthesize environmentally-friendly nanotechnologies. This environmentally friendly procedure is completely safe and non-toxic. The approach is cost-effective, simple to use, and effective, and the attributes of the resultant compounds can be regulated. For example, the Ag compound can be controlled using the same plant extract and reaction. The findings and properties of these nanoparticles were investigated using a variety of techniques, including field emission-scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and atomic force microscopy (AFM). EDX-mapping was also used to explore the analysis of Ag NPs. Electron microscopy investigations with transmission electron microscopes (TEM). which indicated the presence of Ag in the compound and their effective degradation. The produced chemical was tested for effectiveness using bacteria. The antibacterial activity of Ag NPs was investigated utilizing two different species of bacteria, Gram-negative E. Coli and Gram-positive S.aureus e.In addition, the photocatalytic capacity of Ag NPs was discovered through the photodegradation of dyes, as the rhodamine B dye was decomposed at a 78% percent rate. The effect of the catalyst amount and amounts (0.2,0.4,0.6,0.8,1, 1.2,1.4,1.6g/L) were investigated, with the best weight being 1gm and the dye concentration being 10ppm. Water and oxygen are converted to.OH radical with very powerful oxidation by receivers for electrons as well as those electrons and free holes. Keywords: Ag NPs; photocatalytic degradation; anti-bacterial activity; Leucaena leucocephala;

The leaf extract of the plant Primo Fiore was used in this study to synthesize environmentally-friendly nanotechnologies. This eco-friendly method is non-toxic and does not hurt the environment. The approach is cost-effective, simple to use, and extremely efficient, with the ability to adjust the properties of the resultant compounds. For example, the ZnO compound can be controlled using the same plant extract and reaction. The impact of calcination temperature on the physical properties of ZnO NPs has been studied. X-ray diffraction (XRD) and energy dispersive spectroscopy were used to determine the structural and chemical composition of ZnO NPs (EDX). Field emission scanning electron microscopy (FESEM) and transmission electron microscopy were used to examine the morphological features of produced nanoparticles (TEM). The existence of functional groups was investigated using Fourier transform infrared spectroscopy (FTIR), according to the FESEM pictures. Most of the nanoparticles are on the nanoscale. This study demonstrated the efficacy of zinc oxide in the treatment of wastewater pollution for the degradation of colors in organic contaminants in the water medium, destroying the dye rhodamine B and its antibacterial properties. Zinc oxide nanoparticles (ZnO-NP) have been demonstrated to have a good antibacterial capability against both gram-positive and gram-negative bacteria in this study, to investigate the antibacterial activity of zinc oxide nanoparticles. Keywords: ZnO NPs; degradation of dye Rh. B ; anti-bacterial; plant Primo Fiore

The paper reports the study of the complex formation of cobalt (II) with diethylenetriaminepentaacetic acid (DTPA, H5L) based on spectrophotometric (SF) and potentiometric data (pH). Complexes of different compositions were found, and equilibrium constants, as well as the stability constants of these complexes, were determined. Accumulation of complexes in proportion is calculated based on the acidity of the medium. The experimental data have been carried out by using mathematical models to assess the solution's possible existence with a wide spectrum of complex particles and to point out those which are quite sufficient to copy the experimental data. In addition, thermodynamic parameters (ΔG°, ΔH°, and ΔS°) for the studying complexes were calculated according to the values of stability constant (KST) at 25 °C obtained from the temperature dependence of stability constant by using van’t Hoff equation.