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A. N. Nesmeyanov V. A. Sazonova V. N. Postnov N. M. Shchepalina V. V. Stekol'nikov 《Russian Chemical Bulletin》1978,27(9):1921-1923
Conclusions The reactions of the tetraphenylborates of some phenylogs of -ferrocenylcarbonium ions with piperidine were studied.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2175–2177, September, 1978. 相似文献
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Summary The arylhydrazones formed from -dicarbonyl compounds under the conditions of the azo-coupling reaction have a chelate structure with an intramolecular hydrogen bond attached to one of the carbonyl groups. 相似文献
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A.N. Nesmeyanov D.V. Zagorevskii Yu.S. Nekrasov V.F. Sizoi V.M. Postnov A.M. Baran E.I. Klimova 《Journal of organometallic chemistry》1979,169(1):77-81
The main processes of the electron-impact induced fragmentation of the ferrocenyl and cymantrenyl analogues of chalcones RCOCH=CHR′ (R, R′ = C5H4FeC5H5, C5H4Mn(CO)3, or aryl) involve a cleavage of the metalligand bond. A “chalcone” mode of fragmentation is weakly pronounced, due to the fact that the positive charge is localized preferably on the metal atom. 相似文献
6.
N. A. Mel’nikova V. N. Postnov O. V. Glumov I. V. Murin 《Russian Journal of Electrochemistry》2013,49(7):676-679
The surface of aerosilogel and macroporous and microporous glasses was modified with aromatic sulfo groups (≡Si(CH2)2-C6H4-SO3H) by the chemical assembly method. Composite solid electrolytes containing Nafion were prepared from the silica matrices with a chemically modified surface. The proton conductivity of the materials was studied by impedance spectroscopy. Composite materials based on Nafion and aerosilogel matrices and macroporous glasses with grafted ≡Si(CH2)2-C6H4-SO3H groups showed the highest proton conductivity. 相似文献
7.
A procedure has been developed for the synthesis of silica-supported polymerization initiators, which includes chemisorption of (3-aminopropyl)triethoxysilane, hydrolysis of the alkoxy groups, and chemisorption of 4,4′-azobis(4-cyanopentanoic acid). It has been found that the reaction of 4,4′-azobis(4-cyanopentanoic acid) with immobilized amino groups in the presence of N,N′-dicyclohexylcarbodiimide involves only one functional group in the former. The effect of the solid support porosity on the composition of organosilica obtained by surface-initiated radical polymerization of acrylic acid has been studied. The best yield of grafted polyacrylic acid is obtained on aerosilogel with large mesopores in combinations with developed surface. The dependence of the impedance of polyacrylic acid-modified aerosilogel on the relative air humidity has been studied, and the possibility of using this material in humidity sensors has been shown. 相似文献
8.
A new biochemical approach was developed in order to improve the selectivity and sensitivity of determining biologically active
substances. This approach is based on changes in the biological activity of analytes in the course of sample preparation.
Other techniques for solving the above problem, namely, an increase in the temperature of the test solution temperature or
the use of solvent extraction, bioaccumulation, and unusual analytical procedures are also considered. 相似文献
9.
V. E. Fortov V. V. Yakushev K. L. Kagan I. V. Lomonosov V. I. Postnov T. I. Yakusheva A. N. Kuryanchik 《JETP Letters》2001,74(8):418-421
The experimental investigation of lithium compressed by multiple shock waves to a pressure of 210 GPa demonstrates the abnormal dependence of electrical resistivity. Contrary to normal metal behavior, the resistivity monotonically increases in the pressure range 30–150 GPa by more than 15 times from a typical metallic value at ambient conditions and reverts to a metallic value at a pressure higher than 160–210 GPa. The obtained results demonstrate the anomalous resistivity of lithium both in solid and in liquid states. 相似文献
10.
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