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Current Topics in Chemistry - Current Issue
Volume 4, Issue 1, 2024
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Sustainable Green Synthesis and Molecular Docking Study of a Bis-Fused System Incorporating Pyrido[2,3-d]pyrimidine using Nanocatalyst under Microwave Condition
More LessAimsThis study aimed to employ sustainable green methods in the synthesis of bis-fused cycles incorporating pyrido[2,3-d]pyrimidine moiety using a green catalyst nano ZnO catalyst by one-pot, multicomponent reaction among 2,2'-(propane-1,3-diylbis(sulfanediyl)) bis(6-aminopyrimidin-4(3H)-one) 3, 1H-indene-1,3(2H)-dione 4, and aromatic aldehydes 5.
MethodsThe reactions proceeded with both conventional and microwave (MW) irradiation methods.
ResultsThe microwave-assisted method carried out the reaction in 10 min and had high yields (89-95%).
ConclusionA molecular docking simulation study was conducted using human serum albumin (PDB: ID (2XVQ)). The study revealed that compounds strongly fit into the active sites of the target protein.
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Micro-Milli Scale for the Removal of Iron and Copper by a Positively Charged Foam before Nickel Colorimetric Detection using Handy Spectrometer
Authors: Piyanat Issarangkura Na Ayutthaya and Monnapat VongbootIntroductionA simple alternative removal of iron and copper before the determination of nickel was proposed. The procedure was based on sampling a milligram sample and a micro-milliliter operation.
MethodsThe method has been applied to jewelry items. A 50 mg sample was digested by 5 mL of nitric acid with heating. The obtained solution was added to KSCN before passing through polyurethane foam (PUF) (1 cm i.d. × 8 cm length). Some metal ions-SCN complexes (e.g., Fe(III) and Cu(II)) were retained in the column while Ni(II) ions were kept in the eluate. A 200-500 µL aliquot was added with 4-(2-pyridylazo)-resorcinol (PAR) as the color reagent. At least 30 µL of a portion was measured for the absorbance of the color product using a handy spectrometer.
ResultsThe positively charged foam could remove iron and copper altogether before determining nickel. A standard calibration was a plot of absorbance versus Ni(II) concentration for 1-30 mg/L: Absorbance = 0.0123 [Ni(II), mg/L] + 0.0435 (R2=0.9945) with a limit of detection (LOD) and limit of quantitation (LOQ) of 0.24 mg/L and 0.81 mg/L, respectively. Two bracelet samples showed the presence of nickel at 0.97 ± 0.25 and 0.27 ± 0.04 mg/g, respectively, and agreed with the reference FlameAAS method.
ConclusionThe proposed method could be used to assay nickel in samples containing high levels of iron and copper, such as jewelry. This will benefit general wearers with health concerns associated with nickel, particularly in case of inexpensive accessories. The handy spectrometer used in the study might make be helpful to carry out these studies with a limited tight budget.
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Emerging Role of Ionic Liquids in the Fabric Industry
By Umaima GazalProfitable interest in the pervasive packaging of ionic liquids has continued to increase due to its several advantages and environmentally pleasant nature. Fabric enterprise is stated to be the most important enterprise as a result of a rapid increase in the populace across the globe. Certain ionic beverages can dissolve textile fibers. Therefore, ionic liquids are doubtlessly appropriate for material production and recycling. The dyeing of fabric substances involves numerous financial and ecological risks, resulting in an excessive intake of water, power, and chemicals. Ionic liquids surpass through their extraordinarily low vapor pressure, which enables them to deal with commonly used natural solvents. Moreover, ionic liquids display excessive temperature-associated dielectric constants, consequently displaying top-notch solvent strength for distinct fabric-associated substances, inclusive of silicones, keratin, and cellulose. This article provides a brief review of the pertinent literature that focuses on historical patterns and practical commercial applications of ionic liquids before moving on to current developments in ionic liquids and the fabric industry.
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