A comparative study of composites based on imidazolium phosphomolybdates of the SILP type of catalysts for peroxide oxidative desulfurization was performed by mass spectrometry and other physicochemical methods, in particular, XPS (X-ray photoelectron spectroscopy). An analysis of the data obtained revealed partial destruction of heteropolyanions during the synthesis of heterogeneous samples. The results of mass spectrometric measurements are well correlated with the XPS data, indicating the possibility of using mass spectrometry (MS) in the surface-activated laser desorption/ionization (SALDI) technique for characterization of these composites. The results of the analysis of the desulfurization rate showed the important role of the products of partial destruction of heteropolyacid anions in the catalysis of the process.

Bis(trifluoromethylsulfonyl)imide dicationic ionic liquids with an ethereal linker between imidazolium cations have been synthesized. Their thermal stability has been studied, melting points, viscosity, and volatility in vacuum have been measured. The properties of the synthesized ionic liquids with ethereal linkers have been compared with the properties of ionic liquids of a similar structure, but with polymethylene linkers.

Dicationic ionic liquids with a polymethylene ( n C = 5, 9) linker between the imidazolium cations and the bis(trifluoromethylsulfonyl)imide anion have been synthesized. Their thermal stability was studied, and the melting points, viscosity, and volatility in vacuum were measured. The possibility of using the obtained ionic liquids as heat transfer fluids in vacuum was assessed.

ABSTRACTMultiferroic (MF) composites based on nanoparticles consisting of a silica core and a shell of spin‐variable Fe(III) complexes in a polymer matrix (polystyrene) were synthesized and characterized by different methods. The nanoparticles had the formula 80SiO2·20{Fe[OSi(Me)(OEt)2]3}, and their particle size was on the order of 5–7 nm. Dielectric and electron spin resonance studies showed the presence of two types of Fe ions in the nanocomposite. Iron ions in the low‐spin state [Fe(III)‐LS] and iron ions in the high‐spin state [Fe(III)‐HS], which were bound by indirect exchange interactions through oxygen and silicon atoms {[Fe(III)‐LS]─O─Si─O─[Fe(III)‐HS]} were responsible for the MF properties of the composites with core–shell nanoparticles. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47681.

Методом электронно-лучевого диспергирования полинафтоиленбензимидазола и его сульфопроизводных, содержащих ионы K, а также Ca и Zn (впервые синтезированных), получены покрытия, которые потенциально могут быть применены для изготовления селективных потенциометрических сенсоров.

Coatings that can be candidates for fabricating selective potentiometric sensors have been produced by electron beam dispersion of poly(naphthoylenebenzimidazole) and its sulfonated derivatives containing K ions, as well as Ca and Zn ions (synthesized for the first time).

The synthesis, structure, and electrophysical properties of a polymer-inorganic biocompatible composite based on unsaturated chitosan ether, namely, allyl chitosan, and vinyltriethoxysilane are studied. During composite synthesis, allyl chitosan forms an individual nanophase with vinyltriethoxysilane and its condensation products in the polymer matrix of allyl chitosan. The size of nanoparticles embedded in a polymer matrix increases from 50 to 1000 nm as the fraction of the added vinyltriethoxysilane grows. Under exposure to UV radiation, both homopolycondensation and heteropolycondensation occur in the composite films via crosslinking according to the radical mechanism and the composite becomes insoluble in water. It has been shown that the resulting composites feature ionic conductivity under application of both direct current and high-frequency electric fields to the sample. Conductivity is provided by a proton–electron ensemble that concentrates at the nanoparticle/polymer matrix interface.

The analysis of the products of direct carboxylation of 2-methylbutyn-3-ol-2 with carbon dioxide on Ag- and Cu-containing catalysts by 1Н and 13С NMR and FTIR spectroscopy showed that the desired 4-hydroxy-4-methylpent-2-ynoic acid did not form under the given conditions; instead, the triple bond of the substrate decomposed, and two polyfunctional acids formed: 4-hydroxy-4-methyl-3-oxopentanoic and 3,4-dihydroxy-4-methylpent-2-enic (the latter is the result of the keto-enol rearrangement of the former keto acid).

Adsorbents of a new type for CO 2 absorption on amine-modified meso- and macroporous carriers are more efficient than amine water solutions. Their adsorption capacity with respect to CO 2 reaches 13–15 wt %, they are recyclable, and the rates of CO 2 absorption and evolution are higher than those for the liquid systems of CO 2 storage.

The specific interaction of aromatic and aliphatic diamines with benzoic acid without a solvent was studied by IR spectroscopy and phase diagram analysis.

The specific interaction of aromatic and aliphatic diamines with benzoic acid without a solvent was studied by IR spectroscopy and phase diagram analysis.

Thin polymer films were obtained from 3-methoxythiophene at the cathode in a dc discharge. It was found using Fourier transform IR spectroscopy that thiophene rings were the main structural units of the polymer; aliphatic fragments and oxygen-containing groups were also present. The polymer based on 3-methoxythiophene was found to exhibit p -type intrinsic conduction with an activation energy of 0.045 eV. The conductivity of the polymer at 20°C was 10 −8 Ω −1 cm −1 , and doping with iodine resulted in a rise in conductivity to 10 −3 Ω −1 cm −1 .