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161.
A. V. Aksenov I. V. Aksenova A. S. Lyakhovnenko N. A. Aksenov 《Chemistry of Heterocyclic Compounds》2008,44(11):1379-1383
A novel three-component synthesis has been developed for 1,3-diazapyrenes based on the reaction of 1,8-naphthalenediamine
with triazine and carbonyl compounds in polyphosphoric acid (PPA). The use of benzonitrile in place of the carbonyl compounds
in this reaction gives 6-phenyl-1,3,7-triazapyrenes.
Dedicated to one of the best Russian chemists A. F. Pozharskii on his 70th jubilee.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1694–1698, November, 2008. 相似文献
162.
O. V. Shatalova A. V. Krivandin N. A. Aksenova A. B. Solov’eva 《Polymer Science Series A》2008,50(4):417-421
The structure of pluronic F-127 and its complexes with tetraphenylporphyrin has been studied by SAXS and WAXS techniques. It has been shown that the samples prepared via evaporation of chloroform and aqueous solutions of pluronic and its mixtures with tetraphenylporphyrin have a semicrystalline layered structure with the crystalline phase composed of poly(ethylene oxide). The identity period of layers in the samples prepared from the aqueous solution of pluronic has been found to be larger than that in the samples prepared from chloroform solutions of the polymer. This result may apparently be explained by a more pronounced hydration of the samples prepared by the former method. The presence of tetraphenylporphyrin in the samples has an insignificant effect on the parameters of the crystalline and layered structures of pluronic. When the tetraphenylporphyrin content is not larger than its solubilization limit with pluronic, tetraphenylporphyrin concentrates in the amorphous layers of pluronic in the noncrystalline finely dispersed state. 相似文献
163.
N. A. Aksenova N. N. Glagolev V. T. Shashkova N. L. Zaichenko L. S. Kol’tsova A. I. Shienok I. R. Mardaleishvili P. S. Timashev B. I. Zapadinskii A. B. Solov’eva 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2008,82(9):1570-1574
The solubilization of europium β-diketonate complexes with amphiphilic polymers, ternary block copolymers of ethylene and propylene oxides (Pluronics), was shown to change luminescence intensity in such complexes. The association of europium β-diketonate complexes with Pluronics was proved by atomic force microscopy of agglomerates crystallized on mica surfaces from chloroform solutions of Pluronic F-127 in the presence and absence of the luminophores under study. In the absence of luminophores, Pluronic F-127 crystallized on a mica surface had a dendrite-like structure, while the evaporation of chloroform solutions containing both europium β-diketonates and Pluronic F-127 gave crystallized luminophore-Pluronic associates as compact islands with a characteristic size of ~0.5 μm. 相似文献
164.
K. A. Aksenova 《Journal of Mathematical Sciences》2011,176(2):103-111
Following the approach suggested by I. Kaj and M. Taqqu, we consider a stochastic model of teletraffic based on Poisson random measure. We show that under appropriate assumptions, the finite-dimensional distributions for the scaled workload process converge to those of a stable Lévy process. Bibliography: 10 titles. 相似文献
165.
I. A. Kotlova F. A. Kolokolov V. V. Dotsenko N. A. Aksenov I. V. Aksenova 《Russian Journal of General Chemistry》2019,89(12):2413-2419
New complex compounds LnL3·nH2O (n = 5–10) have been synthesized on the basis of Eu3+, Gd3+, and Tb3+ salts and quinoline-4-carboxylic acid derivatives obtained via the Pfitzinger reaction. Composition and structure of the ligands and the resulting complex compounds have been confirmed by NMR and IR spectroscopy, thermogravimetry, and complexometric titration. Europium complex with 1,2,3,4-tetrahydroacridine-9-carboxylic acid has exhibited efficient luminescence. 相似文献
166.
Published data on the recyclization reactions of 1,3,5-triazines are reviewed. The classification is based on the fragments
of the 1,3,5-triazine molecules used in the construction of new heterocycles.
Dedicated to the birthday of A. F. Pozharskii, who has made a great contribution to our establishment as scientists.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 167–190, February, 2009. 相似文献
167.
Karetnikov A. A. Kovshik A. P. Karetnikov N. A. Ryumtsev E. I. Aksenova E. V. Svanidze A.V. 《Optics and Spectroscopy》2021,129(2):234-238
Optics and Spectroscopy - Electrically controlled light refraction in a nematic liquid crystal (LC) with homeoplanar orientation possessing different thicknesses has been investigated at angles of... 相似文献
168.
Dotsenko V. V. Khrustaleva A. N. Frolov K. A. Aksenov N. A. Aksenova I. V. Krivokolysko S. G. 《Russian Journal of General Chemistry》2021,91(1):44-56
Russian Journal of General Chemistry - 1,6-Diamino-2-oxo-1,2,3,4-tetrahydropyridine-3,5-dicarbonitriles under the action of primary aliphatic amines and an excess of 37% formalin in ethanol were... 相似文献
169.
Nicolai A. Aksenov Alexander V. Aksenov Igor A. Kurenkov Nikita K. Kirillov Dmitrii A. Aksenov Nikolai A. Arutiunov Daria S. Aksenova Michael Rubin 《Molecules (Basel, Switzerland)》2022,27(9)
A highly efficient and expeditious one-pot approach towards 2-(3-oxoindolin-2-yl)acetonitriles was designed, which involves a base-assisted aldol reaction of ortho-nitroacetophenones, followed by hydrocyanation, triggering an unusual reductive cyclization reaction. 相似文献