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51.
A. V. Belyankin A. R. Khomutov Yu. N. Zhukov O. N. Kartasheva R. M. Khomutov 《Russian Chemical Bulletin》1997,46(1):133-136
The reaction of aryl and aralkyl aldoximes with hypophosphorous acid resulted in aminophosphinic acids, which were oxidized
into the corresponding aminophosphonic acids.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 137–140, January, 1997. 相似文献
52.
The state-of-the-art in the field of research on semiconductor nanoparticles is analyzed; cadmium chalcogenide nanoparticles
are considered in most detail. Emphasis is placed on the methods of synthesis and on control of the size, composition, and
structure of semiconductor nanoparticles — “quantum dots”. The state of the surface plays a significant role in determining
the properties of nanoparticles. Organized nanostructures comprised of quantum dots are considered. The properties of semiconductor
nanoparticles are described. Prospects for applications of semiconductor nanomaterials are discussed.
Dedicated to Academician V. I. Minkin on the occasion of his 70th birthday.
__________
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 811–836, April, 2005. 相似文献
53.
Conclusions Some conformational inhibitors were synthesized.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1386–1388, June, 1967. 相似文献
54.
Sergey Khomutov Marina V. Donova 《Journal of inclusion phenomena and macrocyclic chemistry》2011,70(3-4):353-357
Molecular-imprinting by cross-linking of ligands of ??-cyclodextrin (CD) complex with steroids has been developed for the synthesis of tailor-made CD dimer. Steroids of androstane (9??-hydroxy-androst-4-en-3,17-dione, androst-4-en-3,17-dione, androsta-1,4-dien-3,17-dione (ADD)) and pregnane (hydrocortisone, 6-methyl-hydrocortisone, 20-hydroxymethylpregna-1,4-diene-3-one (HMPD)) series were used as template molecules. For imprinting procedure, crystalline ??-CD complexes of exact stoichiometry (??-CD:steroid template = 2:1) were synthesized following by toluene 2,4-diisocyanate (TDI) cross-linking. The attempts to produce CD dimer for steroid without hydrophobic side chain failed, while tailor-made CD dimer has been obtained using HMPD as a template. The dimer was characterized by 1H NMR and mass-spectrometry. The complex stability constant (KS) towards HMPD template exceeded 107 M?1. The KS of CD dimer with ADD exceeded the corresponded value of TDI-modified CD monomer by more than an order of magnitude. The dimer was applied for quantitative extraction of ADD from aqueous solution using dialysis membranes impermeable for CD. The value of KS for ADD estimated from balanced concentrations of dialysis data corresponded to that calculated by nonlinear spectrometric method. 相似文献
55.
Ilker Dincer Onur Tozkoparan Sergey V. German Alexey V. Markin Oguz Yildirim Gennady B. Khomutov Dmitry A. Gorin Sergey B. Venig Yalcin Elerman 《Journal of magnetism and magnetic materials》2012
Aqueous colloidal suspension of iron oxide nanoparticles has been synthesized. Z-potential of iron oxide nanoparticles stabilized by citric acid was −35±3 mV. Iron oxide nanoparticles have been characterized by the light scattering method and transmission electron microscopy. The polyelectrolyte/iron oxide nanoparticle thin films with different numbers of iron oxide nanoparticle layers have been prepared on the surface of silicon substrates via the layer-by-layer assembly technique. The physical properties and chemical composition of nanocomposite thin films have been studied by atomic force microscopy, magnetic force microscopy, magnetization measurements, Raman spectroscopy. Using the analysis of experimental data it was established, that the magnetic properties of nanocomposite films depended on the number of iron oxide nanoparticle layers, the size of iron oxide nanoparticle aggregates, the distance between aggregates, and the chemical composition of iron oxide nanoparticles embedded into the nanocomposite films. The magnetic permeability of nanocomposite coatings has been calculated. The magnetic permeability values depend on the number of iron oxide nanoparticle layers in nanocomposite film. 相似文献
56.
Simple and efficient methods for the synthesis oftrans-3-fluoroalkyl-2-aziridinyl ketones from polyfluorinated α,β-enones have been developed. 相似文献
57.
58.
K. I. Pashkevich V. G. Ratner O. G. Khomutov V. B. Korolev V. I. Flyakova 《Russian Chemical Bulletin》1996,45(6):1423-1424
The rcgioselective synthesis of fluoroalkyl-containing P-hydroxyketones by the reduction of the salts of the corresponding -diketones with LiAlH4 was proposed. This is the sole method for the synthesis of -hydroxyketones with two fluoroalkyl substituents.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1493–1495, June, 1996. 相似文献
59.
O. G. Khomutov V. I. Filyakova A. V. Kuchin K. I. Pashkevich GA. Tolstikov 《Russian Chemical Bulletin》1992,41(10):1834-1835
Unlike nonfluorinated analogs, complex esters of polyfluorinated acids in reactions with trialkylalanes produce only polyfluorinated secondary alcohols.Department of Fine Organic Synthesis, Institute of Organic Chemistry, Urals Branch, Russian Academy of Sciences, 450054 Ufa. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 10, pp. 2339–2341, October, 1992. 相似文献
60.
This paper discusses effects of organic ligands, electrostatic and magnetic interactions involved in morphological control of chemically synthesized inorganic nanostructures including colloid and planar systems. The special attention was concentrated on noble metal (gold and palladium) nanoparticles and nanostructures formed at the gas-liquid interface. The analysis of experimental data showed that electrostatic and ligand-related interactions influence very strongly on the metal nanostructure morphology. The hydrophobicity of ligand, charge and binding affinity to inorganic phase are important factors influencing the morphology of inorganic nanostructures formed in a layer at the gas/liquid interface by the interfacial synthesis method. The important point of this method is the quasi two-dimensional character of reaction area and possibilities to realize ultimately thin and anisotropic dynamic monomolecular reaction system with two-dimensional diffusion and interactions of precursors, intermediates and ligands resulting in planar growth and organization of inorganic nanoparticles and nanostructures in the plain of Langmuir monolayer. The morphology of resulting inorganic nanostructures can be controlled efficiently by variations of growth conditions via changes in state and composition of interfacial planar reaction media with the same precursor, and by variations of composition of adjacent bulk phases. The extreme anisotropy and heterogeneity of two-dimensional interfacial reaction system allows creating conditions when growing inorganic particles floating on the aqueous phase surface interact selectively with hydrophobic water-insoluble ligands in interfacial monolayer or with hydrophilic bulk-phase ligands, or at the same time with ligands of different nature present in monolayer and in aqueous phase. The spatial anisotropy of interfacial reaction system and non-homogeneity of ligand binding to inorganic phase gives possibilities for growth of integrated anisotropic nanostructures with unique morphologies, in particularly those characterized by very high surface/volume ratio, high effective perimeter, and labyrinth-like structure. In a case of magnetic nanoparticles dispersed in colloids specific magnetic dipolar interactions can result in formation of chains, rings and more complex nanoparticulate structures or separated highly anisotropic nanoparticles. Theoretical considerations indicate to the importance of system dimensionality in relation to the energy balance which determines specific features of structure organization in planar charged metallic and magnetic nanostructures. For example, a requirement of Coulomb energy minimum, the possibility of free electron redistribution and strengthened attractive interactions between particles in metallic nanostructures can explain formation of very branchy systems with extremely high "effective perimeter". The obtained experimental and literature data show that system dimensionality, organic ligand nature along with electrostatic and magnetic interactions are most important factors of morphological control of chemically synthesized inorganic nanomaterials. The understanding and appropriate exploitation of these factors can be useful for further developments of efficient nanofabrication techniques based on colloidal and interfacial synthetic methods. 相似文献