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1.
A. A. Boitsova N. K. Kondrasheva N. A. Charykov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2017,91(5):905-909
Phase equilibria in nonadecane–decalin and nonadecane–naphthalene systems are studied. Curves of the liquidus and eutectic temperatures of these systems are calculated using the Schröder–Le Chatelier equation and the strictly regular solutions model (RSM). The calculated values and the experimental data are compared. 相似文献
2.
K. N. Semenov N. A. Charykov V. A. Keskinov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2013,87(1):54-57
Synthesis of the piperidine, pyrrolidine, and morpholine derivatives of fullerene C60 and their identification by electronic and IR spectroscopy were reported. The solubility of these derivatives in benzene at temperatures from 20 to 80°C was studied. 相似文献
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K. N. Semenov N. A. Charykov V. A. Keskinov D. G. Letenko V. A. Nikitin E. G. Gruzinskaya 《Russian Journal of General Chemistry》2013,83(4):670-673
Bromofullerenes C70Br8 and C70Br10 were synthesized and identified by electronic absorption and infrared spectroscopy. Their solubility in aromatic solvents (benzene, toluene, o-xylene, and o-dichlorobenzene) was studied in the temperature range from 20 to 60°C. 相似文献
4.
V. A. Keskinov A. K. Pyartman N. A. Charykov O. V. Arapov A. A. Pronkin V. V. Lishchuk V. V. Leonov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2008,82(3):329-331
The phase diagram of the hexane-o-xylene-dimethylformamide ternary liquid system was studied at T= 298.15 K. The diagram contained the regions of homogeneous solutions and two-phase liquid systems (systems with stratification), phase I being enriched in dimethylformamide and phase II, in hexane. The distribution of fullerenes C60 and C70 was considered at various concentrations and simultaneous presence in sections at variable phase compositions. The extraction isotherms of fullerenes C60 and C70 under various conditions were found to be close to linear, and the C70/C60 separation factor depended on the composition of the coexisting phases and ranged from 1.25 to 1.8. Fullerene C70 was predominantly distributed in phase I. 相似文献
5.
K. N. Semenov D. G. Letenko N. A. Charykov V. A. Nikitin M. Yu. Matuzenko V. A. Keskinov V. N. Postnov A. A. Kopyrin 《Russian Journal of Applied Chemistry》2011,84(1):44-49
Method of isothermal saturation in ampules was used to study the solubility of fullerenol in distilled water in the temperature range 20–80°C and to determine the composition of its equilibrium crystal hydrates. The pycnometric technique was employed to examine how the density depends of the concentration of fullerenol solutions and the average molar and partial molar volumes of the components in solution at 25°C was calculated. The method of refractometry was used to study the dependence of the refractive index on the concentration of fullerenol solutions and the specific refraction of the solutions was calculated. 相似文献
6.
N. I. Alekseev S. G. Izotova Yu. G. Osipov S. V. Polovtsev K. N. Semenov A. K. Sirotkin N. A. Charykov S. A. Kernozhitskaya 《Technical Physics》2006,51(2):231-235
Carbon nanotubes are prepared by the method of self-propagating high-temperature synthesis for the first time. The initial components for this synthesis are carboniferous materials (soda, limestone, and Teflon) and reducers (magnesium, lithium, and sodium) with addition of a nickel or iron catalyst. The morphology of the nanotubes (straight multiwall nanotubes apparently free of a catalyst, bent nanotubes completely filled with a catalyst, and carbon nanofibers) is similar to that of nanotubes grown by chemical methods. The nanotubes account for 2–4 wt % of the product synthesized. 相似文献
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8.
N. I. Alekseev Yu. G. Osipov K. N. Semenov S. V. Polovtsev N. A. Charykov O. V. Arapov 《Technical Physics》2006,51(2):278-280
The carboniferous component of slimes in the electrolytic production of alkali metals (in our case, lithium) is studied for the first time with the aim to find nanostructures in it. The content of nanostructures in this component, which accounts for 10% of the slimes and can be separated by mild chemical treatment, is shown to be 2–4%. These structures are multiwall nanotubes or bundles of multiwall nanotubes, most of which are open. No twisted or single-wall nanotubes have been detected. 相似文献
9.
Semenov K. N. Charykov N. A. Kurilenko A. V. Keskinov V. A. Shaimardanov Zh. K. Shaimardanova B. K. Kulenova N. A. Matuzenko M. Yu. Klepikov V. V. 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2020,94(4):698-703
Russian Journal of Physical Chemistry A - The temperature of the onset of ice crystallization (∆Т) is determined for binary aqueous solutions of a water-soluble tris-adduct of light... 相似文献
10.
K. N. Semenov N. A. Charykov O. V. Arapov V. A. Keskinov A. K. Pyartman M. S. Gutenev O. V. Proskurina M. Yu. Matuzenko V. V. Klepikov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2008,82(6):1045-1047
The isothermal (20°C) solubility of fullerene C70 in solvents of the homologous series of monocarboxylic acids C n ? 1H2n ? 1COOH (n = 1–9) and polythermal solubility over the temperature range 20–80°C of fullerene C70 in solvents of the homologous series of monocarboxylic acids C n ? 1H2n ? 1COOH (n = 4–9) were studied. The corresponding solubility diagrams were obtained and characterized. 相似文献