排序方式: 共有78条查询结果,搜索用时 78 毫秒
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Babushkina Anastasia A. Mikhaylov Vladimir N. Novikov Alexander S. Sorokoumov Viktor N. Gureev Maxim A. Kryukova Mariya A. Shpakov Alexander O. Balova Irina A. 《Chemistry of Heterocyclic Compounds》2022,58(8-9):432-437
Chemistry of Heterocyclic Compounds - The Richter cyclization was used for the synthesis of 6-halo-3-(hydroxymethyl)cinnolin-4(1H)-ones. X-ray analysis revealed that these compounds exist as dimers... 相似文献
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Analysis of the Results of Magnetic Measurements of the Structural Elements of the Nuclotron Booster
Emelianenko V. N. Kazinova O. Mikhaylov V. A. Philippov A. V. 《Physics of Particles and Nuclei Letters》2020,17(4):453-455
Physics of Particles and Nuclei Letters - —The results of a statistical and harmonic analysis of the magnetic measurement data of structural elements (dipole magnets) of the Nuclotron Booster... 相似文献
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Medvedev A. G. Sharipov M. Yu. Mikhaylov A. A. Grishanov D. A. Churakov A. V. Prikhodchenko P. V. 《Russian Journal of Coordination Chemistry》2021,47(10):670-678
Russian Journal of Coordination Chemistry - Sodium and potassium tert-butyl peroxide hydrates 2Na+·2C4H9 $${\text{O}}_{2}^{ - }$$ ·7H2O (I) and 2K+· 2C4H9 $${\text{O}}_{2}^{ - }$$... 相似文献
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Zaitseva Elvira R. Sokolov Anatolii I. Mikhaylov Andrey A. Baleeva Nadezhda S. Baranov Mikhail S. Smirnov Alexander Yu. 《Chemistry of Heterocyclic Compounds》2022,58(8-9):477-480
Chemistry of Heterocyclic Compounds - A methodology was developed for the synthesis of phenylspiro[imidazole-4,3'-thiochroman]ones by treatment of [2-(benzylsulfanyl)-benzylidene]imidazolones... 相似文献
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Dr. Alexey A. Mikhaylov Dr. Alexander G. Medvedev Dr. Andrei V. Churakov Dmitry A. Grishanov Dr. Petr V. Prikhodchenko Prof. Dr. Ovadia Lev 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(9):2980-2986
Tellurium–peroxo complexes in aqueous solutions have never been reported. In this work, ammonium peroxotellurates (NH4)4Te2(μ‐OO)2(μ‐O)O4(OH)2 ( 1 ) and (NH4)5Te2(μ‐OO)2(μ‐O)O5(OH)?1.28 H2O?0.72 H2O2 ( 2 ) were isolated from 5 % hydrogen peroxide aqueous solutions of ammonium tellurate and characterized by single‐crystal and powder X‐ray diffraction analysis, by Raman spectroscopy and thermal analysis. The crystal structure of 1 comprises ammonium cations and a symmetric binuclear peroxotellurate anion [Te2(μ‐OO)2(μ‐O)O4(OH)2]4?. The structure of 2 consists of an unsymmetrical [Te2(μ‐OO)2(μ‐O)O5(OH)]5? anion, ammonium cations, hydrogen peroxide, and water. Peroxotellurate anions in both 1 and 2 contain a binuclear Te2(μ‐OO)2(μ‐O) fragment with one μ‐oxo‐ and two μ‐peroxo bridging groups. 125Te NMR spectroscopic analysis shows that the peroxo bridged bitellurate anions are the dominant species in solution, with 3–40 %wt H2O2 and for pH values above 9. DFT calculations of the peroxotellurate anion confirm its higher thermodynamic stability compared with those of the oxotellurate analogues. This is the first direct evidence for tellurium–peroxide coordination in any aqueous system and the first report of inorganic tellurium–peroxo complexes. General features common to all reported p‐block element peroxides could be discerned by the characterization of aqueous and crystalline peroxotellurates. 相似文献
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One of modern approaches to the problem of coordination of classical mechanics and statistical physics — functional mechanics
is considered. Deviations from classical trajectories are calculated and evolution of themoments of distribution function
is constructed. The relation between the received results and absence of the Poincaré-Zermelo paradox in functional mechanics
is discussed. Destruction of periodicity of movement in functional mechanics is shown and decrement of attenuation for classical
invariants of movement on a trajectory of functional mechanical averages is calculated. 相似文献
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E. S. Demidov A. N. Mikhaylov A. I. Belov M. V. Karzanova N. E. Demidova Yu. I. Chigirinskii A. N. Shushunov D. I. Tetelbaum O. N. Gorshkov E. A. Evropeitsev 《Physics of the Solid State》2011,53(12):2415-2420
It has been shown that the presence of silicon nanoparticles in a layer of porous silicon saturated with tungsten-tellurite
glass causes an increase in the photoluminescence quantum efficiency of erbium (1530 nm) by an order of magnitude in the case
of long-wavelength excitation and an enhancement of the ytterbium photoluminescence (980 nm) by almost 50 times and erbium
photoluminescence by 25 times in the case of short-wavelength pumping. This luminescence enhancement is explained by the formation
of additional channels of transfer of external excitation by silicon nanocrystallites in porous silicon to impurity ytterbium
and erbium ions in tungsten-tellurite glass. 相似文献