Current studies describe the application of simultaneous TG–DTA–FTIR techniques in the in-situ synthesis of potassium carbonate (K2CO3) from the thermal decomposition of potassium tetraoxalate dihydrate [KH3(C2O4)2.2H2O]. Progress of the decomposition reactions with increasing temperatures was...

The 1-(isomeric methylbenzoyl)-3-(4-trifluoromethylphenyl)thioureas (1–3) have been synthesized using the reaction of 2-methylbenzoyl isothiocyanate, 3-methylbenzoyl isothiocyanate and 4-methylbenzoyl isothiocyanate with 4-aminotrifluorotoluene in dry tetrahydrofuran in good yields. The series ...

In epidemiological research, it has become increasingly important to assess subjects’ exposure to different classes of chemicals in multiple environmental media. It is a common practice to aliquot limited volumes of samples into smaller quantities for specific trace level chemical analyses. A n...

A series of acidic ionic liquid (ILs) based on imidazole and pyridine were synthesized and fully characterized by using FTIR, 1H and 13C NMR techniques. The acidic ILs applied as solvent and dopant for polymerization of 3-aminobenzoic acid (3ABA) by using of ammonium persulfate as an initiator. ...

The chemical equilibrium and reaction kinetics for transesterification of methyl acetate with ethanol to form ethyl acetate and methanol catalyzed by an ionic liquid 4-(3-methyl-1-imidazolio)-1-butanesulfonic acid triflate ([HSO3-bmim]CF3SO3) were studied. The reaction enthalpy was obtained expe...

A facile synthesis of ethyl 3,3,3-trifluoropropionate is described. Commercially available 2-bromo-3,3,3-trifluoropropene was used as a starting material, which was allowed to react with bromine to produce 2,2,3-tribromo-1,1,1-trifluoropropane. The resulting tribromide was treated with 3 equiv. ...

An efficient and modified synthesis of ethyl-4-nitro/5-nitro/6-nitro and 7-nitroindole-2-carboxylates is described. Carbohydrazides of corresponding ethyl nitroindole-2-carboxylates underwent smooth one-step transformation to 1,3,4-oxadiazolyl nitroindoles (4a–l) on reaction with aromatic carbo...

Experimental design approach was used to optimize the experimental factors in developing a spectrophotometric method for quantification of acetazolamide using N-bromosuccinimide (NBS) as a reagent. In this method, a known excess of NBS was mixed with acetazolamide in acid medium and the unreacte...

To address targeting and bioavailability issues of peptidic drugs like desmopressin, the encapsulation into nanoparticles (NP) has become standard in pharmaceutics. This study investigated the encapsulation of desmopressin into PLGA NP by the use of pharmaceutically common stabilizers as a precu...

A series of new dimer complexes of copper (II) and nickel (II) were designed and synthesized using the Schiff base ligands which was formed by the condensation of 2-aminothiophenol with 2- methoxybenzaldehyde, 3-formylbenzonitrile and 3-bromo-2-hydroxy-5-nitrobenzaldehyde, respectively. The synt...

Reduction of 2-bromo-1-phenylethylidenemalononitrile (BPM) by coenzyme NADH models BNAH and AcrH2 to give 2-phenyl-1, 1-cyclopropanedicarbonitrile (PCN) and 1-phenylethylidenemalononitrile (PM), respectively, was rationalized in terms of a direct hydride transfer with BNAH and an initial electro...

The bulk and surface characteristics during decomposition of the transition metal sulfates of copper, iron (II), iron (III), nickel, and zinc are investigated utilizing various spectroscopic techniques. An oxidized form of sulfur was detected on the surface during decomposition of all metal sulf...

Vanadyl sulfate (VIVOSO4) was used to prepare carbon-supported vanadium catalyst for flue gas desulfurization. The VIVOSO4 impregnated on activated carbon (AC) was easily oxidized into vanadium(V) sulfate phase (possibly V2O3(SO4)2) in air, which exhibited high catalytic activity toward SO2 oxid...

Vanadium (V)-contaminated soil poses health risks to plants, animals, and humans via both direct exposure and through the food chain. Stabilization treatment of metal-contaminated soil can chemically convert metal contaminants into less soluble, mobile, and toxic forms. However, the stabilizatio...

Increasing demand for the rare metals of molybdenum and vanadium stimulates the research on their recovery from various resources. Solvent extraction of molybdenum and vanadium from sulphate solution with Cyphos IL 101 (trihexyl(tetradecyl)phosphonium chloride) in an aromatic diluent of ShellSol...

A novel, highly anionic hydrogel, sulfated katira gum-crosslinked-poly(acrylic acid) (SKG-cl-PAA) was prepared by sulfation of katira gum-crosslinked-poly(acrylic acid) (KG-cl-PAA) hydrogel using chlorosulfonic acid (ClSO3H) in presence of anhydrous pyridine and formamide. Both the hydrogels KG-...

In order to improve the energy density and broad temperature adaptability of vanadium redox flow battery based on sulfate-chloride mixed acid electrolyte, the stability and charge/discharging behavior of electrolytes at a broad temperature range (-20-50 °C) are investigated systematically. The ...

Direct acid leach solution of converter vanadium slag containing tetravalent vanadium is considered to be a low-cost raw material to produce highly pure vanadyl sulfate electrolyte for vanadium battery. The presence of Fe(III) in the primary stripped solution is an obstacle for the further purif...

Suppressing vanadium ions crossover is a top priority in the development of membranes for vanadium redox flow battery (VRFB). One method is to dope inorganic fillers into polymer matrix, which usually decreases membrane's ion conductivity. In this work, sulfated zirconia (SZrO2) is synthesi...

In order to improve the energy density and battery efficiency of vanadium redox flow battery based on sulfate-chloride mixed acid electrolyte, the viscosity, conductivity and electrochemical performance of electrolytes with different concentration compositions are investigated systematically. Th...