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1.
Blokhina S. V. Bykova V. V. Sharapova A. V. Ol'khovich M. V. Trostin A. N. 《Russian Journal of General Chemistry》2003,73(2):257-259
The sorption properties of stationary phases based on nematic p-substituted azoxybenzenes were studied. Correlations were revealed between the structural selectivity of mesogens, chemical nature of terminal substituents, capability for dispersion interactions and polarity of the sorbents, temperature gradient of the retention indices, and thermodynamic parameters of solution of xylene isomers in the sorbents. 相似文献
2.
Yu. G. Abov A. D. Gul'ko F. S. Dzheparov S. V. Stepanov S. S. Trostin 《Physics of Atomic Nuclei》2002,65(11):1999-2008
The nuclear magnetic resonance in beta-active nuclei 8Li at the doubled Larmor frequency in LiF polycrystals is studied before and after treating these polycrystals with an external pressure. A quantitative approach is proposed that makes it possible to calculate the parameters of the resonance line-shape function versus the dislocation structure of crystallites. Data suggesting that the samples under investigation that were subjected to a treatment with an external pressure develop dislocations whose Burgers vectors are parallel are obtained. 相似文献
3.
P. R. Smirnov O. V. Grechin V. N. Trostin 《Russian Journal of Inorganic Chemistry》2013,58(8):1004-1008
Aqueous solutions of gadolinium chloride and gadolinium nitrate are studied by X-ray diffraction over wide ranges of concentrations under standard temperature and pressure. Small-angle peaks on measured scattering intensity curves are interpreted. Small-angle peaks are found not only on the intensity curves for concentrated solutions, but also on those for dilute systems, and this proves that these systems retain a long-range order. Diverse types of ion-ion interactions are shown to be the major contributors to the overall scattering pattern that are responsible for the appearance of pre-peaks. 相似文献
4.
Published data of various research techniques and own experimental results obtained by the X-ray structural analysis concerning
structural characteristics of copper(II) aqua complexes in aqueous solutions of its salts under standard conditions have been
generalized. Structural parameters of the nearest environment of this ion, such as coordination number, interparticle distances,
and ionic association types, were considered. The possibility of the Jahn-Teller effect realization in aqueous solutions of
Cu2+ salts was examined. 相似文献
5.
Y. G. Abov M. I. Bulgakov S. P. Borovlev F. S. Dzheparov A. D. Gul’ko V. M. Garochkin V. E. Shestopal S. V. Stepanov S. S. Trostin 《Hyperfine Interactions》1990,61(1-4):1319-1326
The experimental investigations of the polarization transport in the disordered spin system8Li −6Li in LiF crystal are considered. This process is initiated by one originally polarized beta-active8Li nucleus produced in a nuclear reaction. The autocorrelation function Foo(t) for the ran dom-walks-in-disordered-system
problem has been measured over the range Foo(t)≥0.1 Foo(0) by analysing the β-emission anisotropy. The influence of the resonance
process at double larmor frequency and of the thermal translational motion of8Li and6Li spins is studied. Results are in a good agre ement with the theory. 相似文献
6.
7.
O. V. Surov M. I. Voronova P. R. Smirnov V. N. Trostin N. Zh. Mamardashvili 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2012,86(3):408-412
It is demonstrated that combined analysis of powder X-ray diagrams and differential scanning calorimetry allows us to reveal
complex polymorphic transformations of 4-tert-butylcalix[4]arene upon the formation and thermal destruction of its complex with acetonitrile. The stability of 4-tert-butylcalix[4]arene polymorph containing no solvent molecules in the crystal lattice after the removal of acetonitrile is
assumed. 相似文献
8.
A. V. Kustov N. L. Smirnova B. D. Berezin V. N. Trostin 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(4):588-592
The thermal effects of mixing of aqueous calcium chloride with sodium citrate and ethylenedi-aminetetraacetate in the absence and presence of sodium oxalate have been measured at 25°C. The thermal effects of dilution of aqueous calcium chloride solutions were determined. The thermal effects of calcium oxalate precipitation and formation of calcium complexes with citrate and ethylenediaminetetraacetate ions were calculated. The 1% solution of sodium citrate inhibited the formation of CaC2O4 (s); in a 1% solution of sodium ethylenediaminetetraacetate with [Ca2+][C2O 4 2? ] > 10?5, the endothermal formation of the [CaEdta]2? complex quickly changed to exothermal precipitation. The 3 and 5% solutions of complexons showed a pronounced inhibiting effect on the formation of urinary stones even when the concentration of calcium and oxalate ions in solution exceeded the product of solubility of CaC2O4 by four and more orders of magnitude. 相似文献
9.
Peculiarities of the formation of the structure of aqueous LiCl solution (at a salt: water molar ratio of 1:5.3) in the temperature
range 298-138 K were studied by the method of integral equations. Analysis of the results obtained suggests that transition
of the system into the supercooled and glassy state is accompanied by an increase in the tetrahedral ordering of solvent molecules
and a decrease in the number of interactions between the water molecules in unbound solvent. Lowering the temperature leads
to an increase in the degree of structurization of water molecules surrounding the cation. Preferable formation of hydrogen
bonds with the anion under extreme conditions was established. The glassy state of the solution is characterized by the absence
of direct anion-cation correlations and increased (compared to standard conditions) probability of the formation of ion-water
chains.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1881–1886, October, 1999. 相似文献
10.
R. D. Oparin M. V. Fedotova A. A. Gribkov V. N. Trostin 《Russian Chemical Bulletin》2003,52(7):1482-1491
The structure of water and the influence of halide ions on the structure formation of concentrated LiX : H2O (1 : 5; X = Cl, Br, I) solutions at low temperatures were studied by the method of integral equations. Based on the results obtained, supercooling of pure water is expected to significantly enhance the tetrahedral ordering of its molecules, strengthen hydrogen bonding in the system, and decrease the number of the nearest-neighbor water molecules. The effects for the solutions on lowering the temperature include a partial restoration of the tetrahedral network of H-bonds of the solvent molecules, insignificant increase in the number of the nearest-neighbor water molecules, enhancement of the coordination ability of Li+ cation, strengthening of hydrogen bonding between anions and water molecules in the first hydration shell, increase in the number of solvent-separated ion pairs, and weakening of the temperature effect on these structural parameters in the following order of solutions: LiCl > LiBr > LiI. The probability of contact ion pair formation in the systems studied should appreciably decrease. The temperature should to a greater extent influence the associative ability of larger anions. 相似文献