Diffusion coefficients of chromium(III) acetylacetonate, palladium(II) acetylacetonate, nickel(II) acetylacetonate, vanadyl(II) acetylacetonate, and titanium(IV) oxyacetylacetonate in liquid ethanol were measured by chromatographic peak broadening method (CPB) over the range of temperature 303.1...
Chromium(III) acetylacetonate was found to be an efficient catalyst (10 mol%) for the oxidation of alcohols to aldehydes and ketones with periodic acid (1.5 equiv.) in acetonitrile at room temperature.
Sol–gel silica films doped with chromium (III) acetylacetonate were synthesised on aluminium substrate and characterised by IR and UV–vis reflectance spectroscopy to study localisation and thermal transformations of doping Cr(acac)3 molecules. The involvement of CO groups of Cr(acac)3 molecule...
A new method for the separate determination of Chromium(III) (Cr(III)), Chromium(VI) (Cr(VI)), and Cr(III) acetylacetonate (Cr(acac)3) in water was developed using a cation-exchange extraction disk (CED) and an anion-exchange extraction disk (AED) combined with metal furnace atomic absorption sp...
The diffusion coefficients of chromium(III) acetylacetonate (Cr(acac)3) were measured at infinite dilution in supercritical carbon dioxide and in liquid ethanol. The diffusion measurements in supercritical carbon dioxide were carried out at five different temperatures varying from T = (308.15 to...
The solubilities of cobalt(III) and chromium(III) acetylacetonates (Co(acac)3 and Cr(acac)3) in supercritical carbon dioxide (scCO2) were measured at high temperatures to accumulate new experimental data and to clarify the temperature dependency of solubility across a wide range of temperatures....
The tracer diffusion coefficients, D12, of solutes in supercritical carbon dioxide (SC-CO2), modified or not with cosolvents, are necessary for industrial and research applications. In this study, the determination and analysis of D12 values of chromium(III) acetylacetonate in SC-CO2 are present...
In this work, the poly(amide-imide) (PAI) was synthesized from the polymerization reaction of 4,4′-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) as a diacid with 4,4′-methylenebis(3-chloro-2,6-diethylaniline) under green condition using molten tetra-n-butylammonium bromide and triph...
Three aromatic 6FDA-Durene/MDEA random copolyimides with different Durene:MDEA molar ratios (3:1; 1:1 and 1:3) were synthesized, and pure gas permeation properties through their dense films were investigated. Compared to their corresponding homopolymers (6FDA-MDEA and 6FDA-Durene), the copolymer...
A series of isoprene and sodium styrene sulfonate copolymers (poly(I-co-NaSS)) was synthesized with systematically varied concentrations of ions using radical emulsion polymerization. Their chemical structures and morphologies were characterized and structure-mechanical relationships were determ...
Sulfonated poly (phthalazinone ether ketone) and modified silica nanoparticles by poly (2-acrylamido-2-methyl-1-propanesulfonic acid) were prepared and their impact investigated on the physicochemical and transport properties of sulfonated poly ether sulfone. To optimize the weight percentage of...
Sulfonated poly(arylene ether sulfone) (SPAES) composite membranes were prepared using graphene oxide (GO) and sulfonated poly(arylene thioether sulfone)-grafted graphene oxide (SATS-GO) as fillers for proton exchange membrane fuel cell (PEMFC) applications. When GO and SATS-GO were mixed with S...
Fuel cells are the promising new non-conventional power source for vehicles as well as portable devices. Direct methanol fuel cell (DMFC) is especially attractive since it uses low cost liquid methanol as a fuel. Proton exchange membrane is one of the most crucial part of DMFC. Herein, we synthe...
Nanocomposite membranes based on sulfonated poly (ether ether ketone) (SPEEK) and sulfonated core-shell TiO2 nanoparticles were prepared. TiO2 nanoparticles were sulfonated by redox polymerization method by using sodium styrene sulfonate (SSA) and 2-acrylamido-2-methyl-1-propane sulfonic acid (A...
Aiming to develop an ecologically and economically viable catalytic pathway, dehydration of D-xylose and hemicelluloses to furfural was performed using tin-loaded sulfonated diatomite (SO42−/Sn-DM) as solid acid catalyst in mild reaction system. The solid acid was characterized by SEM, EDS, XRD,...
The ubiquitous sequence diverse 4-Toluene Sulfonate Uptake Permease (TSUP) family contains few characterized members and is believed to catalyze the transport of several sulfur-based compounds. Prokaryotic members of the TSUP family outnumber the eukaryotic members substantially, and in prokaryo...
2-Amino-4-picolinium toluene sulfonate (2A4PTS), a new organic material, was synthesized and grown as single crystals in room temperature by slow evaporation solution growth technique using water as solvent. The crystal structure of 2A4PTS has been determined using single crystal X-ray diffracti...
The diastereoselective reduction of γ-keto-sulfonates to afford α,γ-substituted γ-hydroxy sulfonates has been investigated. Herein we report the first example of a diastereoselective carbonyl reduction whereby hydride attack is directed via chelation of a neighbouring sulfonate group to a bo...
Because, in the presence of a large excess of alkaline hydroperoxides, aldoses are oxidized stepwise to formic acid, it was expected that alduronic acids would be degraded to formic acid and carbon dioxide by the mechanism previously proposed. However, in addition to the products expected, subst...
Aqueous solutions of 4-O-methyl-D-glucuronic acid at pH 7 were heated at 100°, and the monocarboxylic acids formed by isomerization were separated by anion-exchange chromatography and further identified by gas-liquid chromatography-mass spectrometry. After 6 h, the following yields of acids wer...
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