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Asymmetric multicomponent reactions (AMCRs) include the reaction of three or more reactants simultaneously to produce chiral products that they have some advantages containing simple procedures, saving time and energy, and being environmentally friendly processes. AMCRs have seen much development and their potent synthetic approaches are discussed in this review.
Herein, we synthesized AgI–TiO2 hybrid photocatalyst by the sonochemical method. The as-produced hybrid was characterized by using XRD, FESEM, EDS, DRS and PL. The AgI–TiO2 hybrid possessed high photocatalytic properties. The photocatalytic performance of AgI–TiO2 hybrid was studied on photodegradation of Acid Orange 7 (AO7). The hybrid with 25 wt% AgI showed enhanced photocatalytic degradation (95%)...
Two new adsorbents were synthesized by covalently grafting 2,3-Bis(2-formylphenoxy)-propan-1-ol (BH) onto the surface of silica-coated magnetic nanoparticles and silica gel by a conventional method and a vice-versa method. The morphology and properties of the adsorbents were characterized by FT-IR, XRD, SEM, TEM, VSM, TGA, UV-Vis, Optical microscope and DLS. The materials are shown to be effective...
Photocatalytic behavior was investigated for TiO2–graphene nanocomposite in the degradation of acid orange 7 (AO7) as a model pollutant under ultraviolet light in aqueous solution. XRD, SEM, TEM, DRS, FT-IR and EDX techniques were used for the characterization of the prepared nanocomposite. The effect of synthesis variables such as weight ratio of TiO2 to graphene and operational key factors such...
The surface of nanosized fumed silica (FSi) was modified with different amine groups by the use of silylating agents. The obtained propylamine, propylpiperazine, and propyl-p-phenylenediamine–modified FSi were treated with different sulfonyl chlorides to gain sulfonamide-modified FSi compounds. These compounds were characterized by various techniques including Fourier transform infrared spectroscopy,...
A silica-based mesoporous adsorbent, SBA-15-S4 was synthesized through the surfactant method and modified by bis(3-triethoxysilylpropyl) tetrasulfide. The obtained sorbent was characterized by FT-IR, BET, TGA, XRD, SEM, TEM, SAXS and EDX. Further studies revealed that the new synthesis sorbent has a high capacity to adsorb As(III) ions. The main experimental factors affecting removal efficiency of...
Pyruvic acid contains three different reactive positions: –COOH, ketone carbonyl and methyl groups. Correspondingly, pyruvic acid was applied as starting material in the modified Niementowski reaction and Aldol condensation using SBA-Pr-SO3H as an efficient nanocatalyst. Aldol condensation of pyruvic acid and oxindole provided a new oxindol-based carboxylic acid which was subsequently used in the...
SrFe12O19 magnetic nanoparticles (MNPs) were synthesized through a very simple sol–gel auto-combustion technique. Then, it was characterized by different techniques. Likewise, the semi-spherical SrFe12O19 MNPs was observed in SEM image with the average particles’ size of 70 nm. Also, BET surface of particles was calculated as 10.4 ± 0.5 m2/g. Through VSM, magnetic saturation of SrFe12O19 MNPs was...