排序方式: 共有42条查询结果,搜索用时 671 毫秒
1.
E. O. Ashevaskaya L. L. Scherbakova V. A. Scherbakov 《Journal of Radioanalytical and Nuclear Chemistry》1990,143(2):307-316
Uranyl hydration and solvation numbers of uranyl benzenesulfonate (BSU) aqueous-organic solutions have been determined by means of dynamic NMR spectroscopy technique. Three aqua-complexes have been found to exist in aqueous-acetone solution: [UO2 (U6H5SO3)2·4H2O] and [UO2(C6H5SO3)2·(H2O)n] where n=1 or 2 and anions are bridging bidentate. Transition from [UO2 (C6H5SO3)2·4H2O] to the higher aqua complexes begins at P>40. There is a disolvate in the non-aqueous solution of BSU in tri-n-butyl phosphate (TBP). Composition of aqueous and organic phase of the BSU-water-TBP ternary system has been determined at room temperature, allowing to produce the phase diagram of the system. The binodale position is related to the anion amphiphilicity. The solvation number determined for BSU in the organic phases corresponds exactly to the low temperature data and allows to observe BSU dehydration and desolvation in the region of mutual dissolution of water and the organic phase, as well as TBP and the aqueous phase. 相似文献
2.
Khalyavka T. A. Shapovalova M. V. Korzhak G. V. Shcherban N. D. Khyzhun O. Y. Camyshan S. V. Permyakov V. V. Scherbakov S. N. 《Research on Chemical Intermediates》2022,48(1):13-28
Research on Chemical Intermediates - Carbon-modified TiO2 using a sol–gel method (TiO2/CSG) and mechanochemical treatment (TiO2/CMC) was obtained. X-ray powder diffraction (XRD), scanning... 相似文献
3.
L. D. Popov A. O. Bulanov E. A. Raspopova A. N. Morozov I. N. Scherbakov O. I. Kobeleva T. M. Valova V. A. Barachevskii 《Russian Journal of General Chemistry》2013,83(6):1111-1116
A series of new hydrazones based on 3,3-dimethyl-7-hydroxy-8-formyl-[2H]-1-benzopyran-2,1-[2]-oxaindane] with the substituents of different nature in the hydrazone moiety was synthesized. A comparative study of photochromism and complexation of the synthesized spiropyrans with a number of metal cations was carried out. Spectral and kinetic differences in photochromism and complexation of these compounds were revealed. 相似文献
4.
Yu. Zanevsky V. Belyakov V. Chepurnov S. Chernenko O. Fateev Yu. Krasnov A. Moskovsky S. Razin N. Scherbakov A. Zubarev 《Physics of Particles and Nuclei Letters》2008,5(1):54-56
The current status of construction and testing of Transition Radiation Detectors (TRD) for ALICE at LHE, JINR, is presented.
The main purpose of this detector is electron identification at intensive pion background. The whole ALICE TRD system is comprised
of 540 wire chambers of total sensitive area ∼750 m2. Each chamber consists of drift and amplifying gaps and a radiator. One hundred such TRD chambers will be constructed at
LHE, JINR.
The text was submitted by the authors in English. 相似文献
5.
6.
N.?I.?BelayaEmail author A.?V.?Belyj O.?M.?Zarechnaya I.?N.?Scherbakov V.?M.?Mikhalchuk V.?S.?Doroshkevich 《Russian Journal of General Chemistry》2017,87(4):690-697
Mechanisms of the reaction of di- and trihydroxybenzenes with 2,2′-diphenyl-1-picrylhydrazyl (stable radical) in aprotic media of different polarity have been elucidated by experimental and quantum-chemical methods. Kinetic, stoichiometric, and activation parameters of the reaction have been determined. In benzene (nonpolar solvent), the studied reaction occurs via the hydrogen atom transfer mechanism; in the polar solvent with weak ionizing ability (i.e. DMSO), the reaction predominantly occurs via the faster mechanism of coupled electron and proton transfer. 相似文献
7.
Popov L. D. Scherbakov I. N. Borodkin S. A. Revinskii Yu. V. Kazoyan E. A. Shaginyan G. A. Sarkisyan A. R. Markaryan Sh. A. 《Russian Journal of General Chemistry》2019,89(5):906-912
Condensation of 4-hydroxy-3-formylcoumarin with 4-aminobenzyl(triphenyl)phosphonium bromide has led to the formation of a phosphonium salt existing in DMSO solution as a mixture of two enamine forms, Z and E, according to NMR spectroscopy and quantum-chemical simulations data. Basing on the obtained salt, the ML2 metal chelates of zinc(II), copper(II), and nickel(II) have been synthesized. Luminescence properties of the ligand and its complex with zinc have been studied.
相似文献8.
Leonid N. Bochkarev Vladislav I. Scherbakov Irina P. Malysheva Galina V. Basova Natalia E. Stolyarova Irina K. Grigorieva Andrey L. Bochkarev Georgii K. Fukin Yurii A. Kurskii Gleb A. Abakumov 《Journal of organometallic chemistry》2006,691(5):983-986
The novel silicon-, germanium- and tin-containing imido alkyl complexes of tungsten of the type (ArN)2W(CH2EMe3)2 (; E = Si (1), Ge (2), Sn (3)) have been prepared by the reactions of (ArN)2WCl2(dme) (dme = 1,2-dimethoxyethane) with heteroelement-containing alkyllithium or Grignard reagents Me3ECH2Li (E = Si, Ge), Me3ECH2MgCl (E = Ge, Sn). The title compounds were isolated in high yields as crystalline solids and characterized by elemental analysis, IR, 1H, 13C, 29Si and 119Sn NMR spectroscopy and X-ray diffraction studies. The geometry of the W atoms in the compounds can be described as a distorted tetrahedron. 相似文献
9.
10.
S. G. Barsov A. L. Getalov V. P. Koptev L. A. Kuzmin S. M. Mikirtychyants G. V. Scherbakov A. A. Vasiljev V. K. Fedotov V. I. Kulakov R. K. Nicolaev N. S. Sidorov Y. M. Mukovskii A. S. Nigmatulin S. E. Strunin 《Hyperfine Interactions》1991,63(1-4):161-167
In this work the magnetic and superconducting properties of YBa2Cu3O6+x
, ceramic samples are studied with regard to there preparations technology and oxygen content. It is shown that at 0.41≤x≤0.45 the magnetic and superconducting states coexist. 相似文献