Deep eutectic solvents (Reline) and Gold Nanoparticles Supported on Titanium Oxide (Au–TiO2) as New Catalysts for synthesis some substituted phenyl(substituted-3-phenyloxiran)methanone Enantioselective Peroxidation

Abstract

Background: The eco-friendly power of hydrogen peroxide oxidant produced water that was the only by-product after oxidation. Unfortunately, its oxidation power towards chalcones and chalcones analogs was substantially low, and therefore, it was normally used together with a catalyst or converted to hydroperoxides in order to improve its oxidation power.Objective: This research aimed to study epoxidation chemistry. Hence, hydrogen peroxide was used as a potential oxidant for epoxidation with different techniques and catalysts. Methodology: Advantageous effects of (reline) (derived from two moles of choline chloride and one mole of urea) as a deep eutectic solvent (DES) or the gold (Au) catalyst nanoparticles (NPs) supported on titanium oxide (Au-TiO2) on the chalcone derivatives of peroxidation was studied under several procedure conditions using hydrogen peroxide/sodium bicarbonate to produce novel oxiranes (I-VI). Results and Discussion: Acceptable results were obtained by method (B) using hydrogen peroxide/sodium bicarbonate -(reline) mixture, which gave 87-90% peroxidation results in a short time (4 h) in comparison with less than 86% and 24 h of the conventional method (A), while using the Au NPs supported on titanium oxide (Au-TiO2); that is, Method (C) gave the best percentage yield of 90-95 % and time (about 2 h), which is about half of that of (Reline) mixture. Such a condition may be due to high activation of hydrogen peroxide by Au and titanium oxide nanoparticles and low viscosity of the reaction mixture. Conclusions: The chalcones epoxidations would convince chemists that using the deep eutectic solvent (Reline) and the Ausupported on titanium oxide NPs for catalysing these reactions are techniques of great importance in various branches of oxidation.

Removal of Pb(II) ions from Tigris river wastewater in Mosul city by using modified commercial activated carbon

“…Study the porosity, which is the most crucial parameter of chemical characterization, the highest pore volume available in the modified activated carbon samples, i.e., the highest sorption capacity towards iodine is (707.2mg/gm), this result approves with methylene blue 190mgm/gm indicates that the treated modified activated carbon (MAC), i.e. sample (9) at 50 °C and 10M of acid concentration is the most attractive candidate for removing the organic dye of methylene blue which shows a significant reduction of the color [38][39][40][41]. This sample also gives the lowest ash percentages (1.9%), which indicates high carbon purity.…”

Design Strategy and Application of Deep Eutectic Solvents for Green Synthesis of Nanomaterials

“…The ChCl-GA DES performed the best cooperation and balance between catalytic ability and stability. Recently, the combination of reline DES, gold nanoparticles (AuNPs), and Titanium oxide (TiO 2 ) was developed as a new catalysis system [ 204 ]. The reline DES and AuNPs supported TiO 2 nanoparticles were investigated with great prominence in various sections of oxidation for catalyzing reactions.…”

Synthesis and Biological Evolution of Novel Substituted 1,2,4-triazine from Sulfanilic Acid

“…Biological evaluation of the prepared compounds was carried out as they were used as antibacterial for gram-positive and gram-negative bacteria. It is known that the effect of the sulfonic acid group is large, so it gave excellent results if compared with the known antibiotics, where the compounds showed 7-11 higher efficacy than those used (28)(29)(30) . Table (7) shows the values obtained by studying the biological activity of the prepared compounds (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11).…”