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71.
72.
73.
N. V. Tverdova N. I. Giricheva G. V. Girichev N. P. Kuz’mina O. V. Kotova A. V. Zakharov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2009,83(13):2255-2265
Vibrational spectra of N,N′-ethylene-Bis(salicylaldiminaates) and N,N′-ethylene-Bis(acetylacetoniminates) of nickel (II),
copper (II), and zinc (II) are studied experimentally (IR spectroscopy, 400–4000 cm−1) and theoretically (B3LYP), band assignment is given, and the distribution of potential energy of normal vibrations in internal
coordinates is studied. Differences between vibrational spectra of the complexes are discussed. Thermodynamic functions of
gas-phase complexes corresponding to temperatures of 298 and 800 K are calculated. 相似文献
74.
S. V. Samolienkov O. V. Kotova N. P. Kuz’mina 《Russian Journal of Coordination Chemistry》2009,35(11):793-797
A one-step method for the synthesis of volatile barium and strontium complexes [M(Thd)2(Phen)2] (M = Ba, Sr; Thd is the dipivaloylmethane anion) was developed. The method is based on the reaction of metal hydroxide octahydrates
with dipivaloylmethane (HThd) and o-phenanthroline (Phen) accompanied by removal of water from the reaction mixture as a solvent-water azeotrope. In the case
of calcium hydroxide monohydrate, a similar interaction causes destruction of the dipivaloylmethanate ligand to give a mixed-ligand
calcium complex with the pivalate anion and o-phenanthroline. 相似文献
75.
T. A. Krysanova D. L. Kotova V. F. Selemenev 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2009,83(2):220-222
The interaction of water with solid Novocaine hydrochloride was studied isopiestically over a wide range of solvent relative activities. The Gibbs energy of water interaction with Novocaine hydrochloride crystals was calculated. A scheme of intermolecular interactions in the water-Novocaine hydrochloride system was suggested. 相似文献
76.
O. V. Kotova S. V. Eliseeva A. S. Averjushkin L. S. Lepnev A. A. Vaschenko A. Yu. Rogachev A. G. Vitukhnovskii N. P. Kuzmina 《Russian Chemical Bulletin》2008,57(9):1880-1889
The effect of the nature of organic ligands and complex formation on the photoluminescent characteristics (relative quantum
yield, excited-state lifetime) and thermal stability of tetradentate Schiff bases (H2L), derivatives of salicylaldehyde (H2(SAL)1, H2(SAL)2), o-vanillin (H2(MO)1, H2(MO)2) with ethylenediamine and o-phenylenediamine, and their zinc(II) complexes was studied. Zinc(II) complexes were synthesized by the reaction of H2L with Zn(AcO)2·2H2O in MeOH at room temperature or under reflux. In the case of H2L = H2(SAL)2, H2(MO)1, H2(MO)2, complexes of the composition ZnL·H2O were isolated irrespective of the temperature. For H2L = H2(SAL)1, the reaction results in Zn(SAL)1·H2O at room temperature and in anhydrous dimeric complex [Zn(SAL)1]2 under reflux. Density functional calculations of H2L and ZnL confirmed that (1) luminescence of these compounds is due to the π-π* transition between orbitals of the organic
ligand and (2) enhancement of conjugation of the chain and introduction of electron-donating substituents lead to a decrease
of the energy gap and, there-fore, to a bathochromic shift of the emission maximum.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1846–1855, September, 2008. 相似文献
77.
D. L. Kotova E. G. Davydova T. A. Krysanova 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2011,85(7):1183-1186
The mechanism of formation of hydrate structures in the system sulfo exchanger-imino acid was suggested. The mutual position
of fixed ion, imino acid, and water molecules was determined in cation exchanger. The conclusion was made on the presence
of water molecule between the functional group of sorbent and counterion of imino acid. It was demonstrated that the mechanism
of sorption of proline and hydroxyproline is performed by the break of bond between water molecules and protonation of carboxylic
group of imino acid. 相似文献
78.
D. L. Kotova E. G. Davydova T. A. Krysanova A. V. Astapov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2008,82(4):619-622
The thermokinetic characteristics of sorption of proline and hydroxyproline on H-sulfocation exchanger were determined. The absorption of dipolar imino acid ions by the cation exchanger was found to be an exothermic process accompanied by a decrease in the enthalpy component of sorption. The enthalpy character of sorption was to a greater extent characteristic of hydroxyproline. 相似文献
79.
V. V. Myasoedova L. R. Lyusova S. V. Kotova V. A. Optov A. N. Shchegolikhin 《Polymer Science Series D》2008,1(3):154-157
Results of comprehensive systematic physicochemical studies of the blends of ethyl cellulose and butadiene-acrylonitrile rubbers are reported. It is shown that the addition of butadiene-acrylonitrile rubbers to ethyl cellulose results in the formation of ethyl cellulose-butadiene-acrylonitrile rubber thermoelastoplastic complexes due to the elastification of the thermoplastic polymorphous structure of ethyl cellulose with enhanced impact strength and heat resistance. 相似文献
80.
O. V. Kotova 《Ukrainian Mathematical Journal》2008,60(10):1650-1659
We study the equation ν
1(x) = x, where ν
1(x) is the function of frequency of the digit 1 in the ternary expansion of x. We prove that this equation has a unique rational root and a continuum set of irrational solutions. An algorithm for the
construction of solutions is proposed. We also describe the topological and metric properties of the set of all solutions.
Some additional facts about the equations ν
i
(x) = x, i = 0, 2, are given.
Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 60, No. 10, pp. 1414–1421, October, 2008. 相似文献