Vol 91, No 5 (2018)

The existing methods for synthesizing 2-vinylnorbornane were considered comprehensively. The efficiency and feasibility of two main synthetic routes to 2-vinylnorbornane, heterocodimerization of ethylene with norbornene and selective hydrogenation of 5-vinylnorborn-2-ene, were compared on the basis of the available papers and patent data.

A nitrone, (E)-3-(N-oxide-methylimino)indolin-2-one, was synthesized and analyzed by X-ray single crystal analysis. The inhibition and the mechanism of action of the title compound on the corrosion of high protective Q235A steel in HCl solution were screened and discussed by weight loss and electrochemical measurements. The mechanism of action of (E)-3-(N-oxide-methylimino)indolin-2-one in HCl solution was screened for the corrosion of N80 steel in 1-methylindolin-2-one solution, and the inhibition mechanism was discussed. The results indicated that it can inhibit the corrosion with moderate inhibition efficiency in different conditions, and the mechanism of the corrosion inhibiting may be mainly contributed to the adsorption. It was screened for antibacterial activity against oilfield water-borne bacteria, and it showed good to moderate activity against sulfate reducing bacteria.

The core-shell nanostructure materials have gained great interests because of its excellent photocatalytic properties and promising applications in several fields. In this work, we prepared the core-shell SiO₂@TiO₂ nanocomposites by the versatile kinetics-controlled coating method. The graphene oxide (GO) was further reduced over SiO₂@TiO₂ using UV-assisted photocatalytic reduction method. The physicochemical properties of the as-prepared SiO₂@TiO₂/RGO nanocomposites were characterized by SEM, XRD, BET, EDS, and FTIR. Results showed that, TiO₂ was mainly composed of anatase phase with high crystallinity. Their photocatalytic activities were examined by the degradation of Rhodamine B (RhB) under UV light irradiation. The presence of RGO obviously improved the adsorption ability and photodegradation performance of the composites to RhB. The degradation kinetics of RhB can be described by the pseudo-first-order model. The optimum mass ratio of SiO₂@TiO₂ to RGO in the composite was 1/0.05 and the rate constant was about 4 times greater than that of the SiO₂@TiO₂.

Results are presented of a study of the electrochemical behavior of copper(II) and selenium(IV) ions and their joint reduction on a molybdenum electrode by cyclic voltammetry in a tartaric acid electrolyte. The potentiostatic deposition was used to obtain copper selenide deposits on Mo plates. The diffraction and energydispersive analyses demonstrated that a Cu_2‒xSe compound is formed with an admixture of the CuSe phase. A suggestion is made that the process of underpotential reduction affects the formation of copper selenide. Copper selenide films were deposited at a potential of ‒0.6 V in the course of 30 min with a thickness of 0.43 μm and high adhesion to the substrate. At potentials in this range, an additional amount of the deposit may be formed due to the chemical reaction between Cu⁺ and Se^2‒ ions. The p-type conduction was determined for films electrodeposited at various potentials.

Solid-phase synthesis of cobalt, nickel, copper, and zinc ferrites with spinel structure was performed from oxides of these metals and natural magnetite under the action of microwave radiation. The optimal conditions in which the corresponding ferrites can be formed were determined by varying the irradiation parameters affecting the reaction (magnetron power and reaction duration). It was found that the solid-phase interaction of oxides of Ni, Zn, Cu, Co(II) metals gives in practically acceptable yields metal-substituted ferrospinels (NiFe₂O₄, CoFe₂O₄, ZnFe₂O₄, CuFe₂O₄) constituting the main phase of the samples. A high capacity of the precursors and target synthesis products for absorption of the microwave radiation energy at a frequency of 2.45 GHz and its transformation into heat was demonstrated. This gives reason to use these compounds when preparing catalysts for microwave-stimulated reactions.

The efficiency of sorption purification from nitrogen monoxide NO of waste industrial gases using a suspension of ferromanganese concretions is experimentally confirmed on the example of a model mixture corresponding to the offgas. An absorption mechanism was established and the conditions of the process that ensure the uptake of NO from the model mixture to 85% are selected.

Ni/ZnO adsorbents with various Ni/Zn molar ratios were prepared by coprecipitation; their adsorption capacity in reactive adsorption desulfurization (RADS) of diesel oil was investigated. Ni/ZnO exhibits much higher adsorption performance than pure Ni and pure ZnO. The Ni content plays a crucial role in determining RADS activity over Ni/ZnO; the sulfur capacity depends on the ZnO content in Ni/ZnO. The Ni₄/Zn₆ adsorbent shows the optimal performance; the sulfur content in diesel oil is reduced to less than 5 ppm in first 60 h and less than 15 ppm in next 68 h.

Brief information is presented about the state of the world and domestic market of composite materials and epoxy resins as raw materials for polymeric matrices. It is shown that facilities for manufacture of epoxy resins should be created in the country, with a total output capacity of 40–50 thousand tons a year. p-tert-Butylphenol glycidyl ether was synthesized and its influence on the properties of composites based on ED-20 epoxy resin was examined. Dependences of the viscosity, gelation duration, glass-transition point, water-absorption capacity, and hardness of the composites on the amount of diluent were obtained. The results can be used to solve the problem of choosing the diluent in manufacture of composite materials.

Chitosan/gelatin blend nanofibers were electrospun and the focus of this study was on the chitosan and gelatin concretions and on morphology of resulting nanofibers. The morphology of electrospun chitosan/gelatin blend nanofibers were characterized using scanning electron microscope (SEM). The miscibility of blend was determined using a SEM and Fourier transform infrared spectrometer/attenuated total reflectance (FTIR/ATR). Antibacterial property and stability of samples was also investigated. Water contact angle measurement (WCA) was employed to investigate the wettability of nanofibers.

In title section and ACKNOWLEDGMENTS Arktika Center of Collective Use of Scientific Equipment should be replaced by Core Facility Center “Arktika.”

In abstract, line 7, and on page 666, line 24, exclusion should be replaced by size exclusion.

On all pages of the paper, ionic fluid and IF should be replaced by ionic liquid and IL, respectively.

On page 664, left column, last line, Kumlet–Taft should be replaced by Kamlet–Taft.

On page 665, left column, line 34, frustrated total internal reflection should be replaced by attenuated total reflection.

On page 665, left column, lines 35, 36, 40, FTIR should be replaced by ATR.

On page 667, left column, line 25, [BMIn]Ac‒DMSO should be replaced by [BMIm]Ac‒DMSO.