Journal of Applied Chemical Research
Volume:17 Issue: 3, Summer 2023

Easy operation, eco-friendliness, and high capacity are the advantages of using hydrogelbased membranes in water treatment, medicine, drug delivery, wound care products, and protective clothing. In the present work, we tried to prepare bio-films with antimicrobial ability by incorporating of Cu ions in chitosan and poly vinyl poly Pyrrolidone. The prepared film was characterized by the thermal gravimetric analysis (TGA), Fourier transforms infrared spectroscopy (FT IR), scanning electron microscopy with X-ray microanalysis (SEM-EDS), and X-ray powder diffraction. The antimicrobial ability of the prepared film was confirmed due to the analysis of antibacterial assay results by using gram-positive and gram-negative bacteria. Based on the achieved data, the prepared multifunctional bio-film could be a considerable candidate in packing industry, especially in medical compounds, tissue engineering, and pharmacology.

Dyes are the most important materials in industries which are dangerous to ecological systems due to their toxic properties. This study investigated the photocatalytic efficiency of TiO2 nanoparticles stabilized on a glass plate in order to remove Acid Red1 (AR1) dye in an aqueous solution under UV Light. In this research, the photocatalytic decomposition of the AR1 dye was carried out in a batch tubular reactor with a recirculating flow. Effective parameters on the process such as: the initial pH of the solution, the concentration of AR1, the distance of the lamp from the catalysts’ surface, the concentration of H2O2, and the flow rate were studied. The morphological properties of the Titanium dioxide nanoparticles stabilized on the glass plate were investigated through SEM and AFM. The favorite dye removal efficiency for a solution containing 30 mg/L of AR1 was obtained in the pH of 2.5, H2O2 concentration of 10.12 mM, radiation time of 120 min, and the lamp-catalyst surface distance of 10 cm. In these conditions, the dye removal efficiency became approximately 99%.

A susceptible voltammetric sensor for thyroxine is designed and generated by electropolymerization of molecularly imprinted polymer (MIP). Thyroxine selective molecularly imprinted polymer is synthesized by electropolymerization of the p-phenylenediamine‒resorcinol mixture directly on the screen-printed carbon electrode (SPCE) surface in the presence of the thyroxine molecules. Electropolymerization of monomers deposited a film on the electrode surface which blocked ferricyanide reduction. Elimination of the Thyroxine forms the cavities which caused a remarkably improved ferricyanide signal which was again blocked after the rebinding of thyroxine. The decrease of the ferricyanide peak of the MIP electrode depended linearly on the thyroxine concentration. Various factors affecting the current response of the electrode were studied and optimized. This sensor shows a linear response range of 1 × 10-8- 2 × 10-6M and a lower detection limit of 5 × 10-9 M. The sensor was successfully applied to the detection of thyroxine in human plasma samples.

A simple and easy synthetic route for preparing PP-g-PSt/O-MMt nanocomposite was synthesized using a combination of ring-opening polymerization and reversible addition–fragmentation chain transfer polymerization techniques. Firstly, MAH (maleic anhydride) was reacted with PP (polypropylene) followed by the opening of an anhydride ring with ethanolamine to obtain a hydroxyl group including polypropylene (iPP-OH). Secondly, the produced PP-OH was treated with 4-cyano-4-[(phenylcarbothioyl) sulfanyl] pentanoic acid to synthesize of PP-RAFT macroinitiator. Then, the styrene monomer was grafted onto PP using RAFT approach to produce a well-defined (PP-g-PSt) copolymer. Finally, Polymer/clay nanocomposite was synthesized through a solution intercalation method. The successful synthesis of all materials was proved using FT-IR and 1H NMR spectroscopy. The structural morphology and thermal properties of the grafted copolymer /O-MMT nanocomposite were examined using SEM, TGA, and DSC. This approach employed via the RAFT method is an easy and alternative strategy for synthesizing new materials.

A novel and simple way to synthesize quinoxaline derivatives bearing functional group moieties in a one-pot reaction from o-phenylenediamine and benzil derivatives in the presence of Choline chloride:2 ZnCl2 as a green and reusable catalyst is described. The products were characterized by using FT-IR, 1H-NMR, 13C-NMR, and comparing the melting points with authentic samples. The reaction was followed by the nucleophilic addition mechanism in which the catalyst polarizes, and promotes the carbonyl groups. The catalyst used was presented with several advantages, including easy preparation, low price, high stability, proper reusability, easy separation, purification from the reaction mixture, and an outstanding yield of quinoxaline derivatives under a suitable temperature and reaction time in a non-toxic solvent.

Tartrazine is a synthetic organic food dye that can be found in common food products such as bakery products, dairy products, candies, and beverage. The presence and content of tartrazine color must be controlled in food products due to their potential harmfulness to human beings.To determine the tartrazine color in solution, we used a prepared from Starch-capped ZnSNPs sensor and kinetic spectrophotometric method. The calibration curve was linear in the range of 0.01 to 10.0 mg L-1. The standard deviation of 1.0 %, and detection limit of the method (0.01 mg L-1 in time 25 min, 399 nm) were obtained for sensor level response Starch-capped ZnSNPs with (95%) confidence evaluated. The chemical Starch-capped ZnSNPs sensor made it possible as an excellent sensor with reproducibility.