New succession related to the transition metal complexes Cu(II), Ni(II), and Co(II) with 4-((Z)-4-bromobenzylidene)-2-(7-((4bromobenzylidene)amino)-3methyl-8oxo-5-thia-1azabicyclo[4.2.0]oct-2-en-2yl)oxazol-5(4H)-one) has been prepared and described. The structural descriptions have been reached from FT-IR, UV Vis-Spectrophotometer, molar conductance measurements, magnetic susceptibility, atomic absorption techniques as well as 1 HNMR. Based on these results, it is proposed that the coordinates of the ligand to metal ions from the nitrogen related to azomethine group as well as the oxygen of carbonyl group. In addition, the biological activity of the complexes and the ligand has been investigated opposite Staphylococcus aureus, Aspergillus Niger, E.coli, and Candida albicans. The products indicate that Co (II)-complex, Ni (II)-complex and Cu (II) -complex is the enhanced biological activity in comparison to the ligand.
Development of a new, cheap, efficient, and ecofriendly adsorbents become important demand for the treatment of waste water, so nano polyaniline walnut husks is considered a good choice. A sample of nanocomposite was prepared from polyaniline. The prepared sample was characterized using various characterization techniques such as FT-IR, SEM and XRD analysis. The SEM analysis of sample shows nanostructures with pore ranging (2-100 nm(. The adsorptive properties of this sample were examined by eliminating E102 dye from aqueous solution. Amount Experimental methods were performed at room temperature (25⁰C) to study the different variables which affect the adsorption process like: nanocomposite amount, initial concentration of dye, and contact time. The experimental results at equilibrium were determined using Langmuir and Freundlich adsorption isotherms and show best fitted with Langmuir model which reveal that the adsorption of E102 dye by the nanocomposite is monolayer adsorption. Kinetics aspects was also investigated by evaluating parameters from pseudo-first and pseudo-second order reaction equations on adsorption rate which show good fitting with both kinetics equations, but pseudo-second order equation was the best to describe the kinetics parameters.
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