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排序方式: 共有617条查询结果,搜索用时 15 毫秒
71.
Vasin V. A. Korovin D. Yu. Razin V. V. Petrov P. S. 《Russian Journal of Organic Chemistry》2019,55(4):415-425
Russian Journal of Organic Chemistry - Tricyclo[4.1.0.02,7]heptane and 1-phenyltricyclo[4.1.0.02,7]heptane reacted with 2,3-bis(benzenesulfonyl)propene in boiling toluene (20–24 h) in the... 相似文献
72.
Technical Physics - The formulated problem makes it possible to study the influence of magnetic forces on capillary instability of a ferrofluid jet with given physical characteristics in both weak... 相似文献
73.
Ruslan V. Vovk Georgij Ya. Khadzhai Oleksandr V. Dobrovolskiy 《Applied Physics A: Materials Science & Processing》2014,114(3):997-1002
A single-sized dielectric cylinder-based metamaterial is fabricated from TiO2 nanoparticles, using a bottom-up approach. The sub-elements constituting the metalayer are embedded in a nonmagnetic transparent host matrix in the microwave regime and arranged in a square lattice. We demonstrate numerically and experimentally a broadband magnetic activity. The key feature to achieve this performance remains in the high aspect ratio of the metamaterial building blocks. This is a very promising step towards complex electromagnetic functions, involving low-cost metamaterials with simple fabrication. 相似文献
74.
75.
Malets Yehor S. Moskvina Viktoriia S. Grygorenko Oleksandr O. Brovarets Volodymyr S. 《Chemistry of Heterocyclic Compounds》2019,55(11):1007-1012
Chemistry of Heterocyclic Compounds - This minireview highlights known methods for the synthesis of azachromones and azachromanones, including the earliest and the latest examples of their... 相似文献
76.
Dr. Bugga Balakrishna Arjun Menon Dr. Kecheng Cao Sebastian Gsänger Dr. Sebastian B. Beil Julia Villalva Oleksandr Shyshov Oliver Martin Prof. Dr. Andreas Hirsch Prof. Dr. Bernd Meyer Prof. Dr. Ute Kaiser Prof. Dr. Dirk M. Guldi Prof. Dr. Max von Delius 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(42):18933-18945
77.
Multicomponent Self‐Assembly with a Shape‐Persistent N‐Heterotriangulene Macrocycle on Au(111)
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Kang Cui Dr. Florian Schlütter Dr. Oleksandr Ivasenko Dr. Milan Kivala Dr. Matthias G. Schwab Dr. Shern‐Long Lee Dr. Stijn F. L. Mertens Dr. Kazukuni Tahara Prof. Yoshito Tobe Prof. Klaus Müllen Dr. Kunal S. Mali Prof. Steven De Feyter 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(4):1652-1659
Multicomponent network formation by using a shape‐persistent macrocycle ( MC6 ) at the interface between an organic liquid and Au(111) surface is demonstrated. MC6 serves as a versatile building block that can be coadsorbed with a variety of organic molecules based on different types of noncovalent interactions at the liquid–solid interface. Scanning tunneling microscopy (STM) reveals the formation of crystalline bicomponent networks upon codeposition of MC6 with aromatic molecules, such as fullerene (C60) and coronene. Tetracyanoquinodimethane, on the other hand, was found to induce disorder into the MC6 networks by adsorbing on the rim of the macrocycle. Immobilization of MC6 itself was studied in two different noncovalently assembled host networks. MC6 assumed a rather passive role as a guest and simply occupied the host cavities in one network, whereas it induced a structural transition in the other. Finally, the central cavity of MC6 was used to capture C60 in a complex three‐component system. Precise immobilization of organic molecules at discrete locations within multicomponent networks, as demonstrated here, constitutes an important step towards bottom‐up fabrication of functional surface‐based nanostructures. 相似文献
78.
Kazakova M. A. Korovin E. Yu. Moseenkov S. I. Kachalov A. S. Sergeenko D. I. Shuvaev A. V. Kuznetsov V. L. Suslyaev V. I. 《Russian Journal of Applied Chemistry》2018,91(12):1994-2002
Russian Journal of Applied Chemistry - Specific features are revealed of how composite materials are formed on the basis of polyethylene and multi-walled carbon nanotubes modified with iron oxide... 相似文献
79.
M. A. Kazakova N. V. Semikolenova E. Yu. Korovin S. I. Moseenkov A. S. Andreev A. S. Kachalov V. L. Kuznetsov V. I. Suslyaev M. A. Mats’ko V. A. Zakharov 《Russian Journal of Applied Chemistry》2018,91(1):127-135
Specific features of formation of composite materials based on polyethylene, multi-walled carbon nanotubes, and cobalt nanoparticles (MWCNT–PE and Co/MWCNT–PE) by in situ polymerization were revealed. The in situ polymerization technique is based on ethylene polymerization on a highly dispersed Ti-containing catalyst supported on the surface of MWCNT and Со/MWCNT. This method ensures uniform distribution of MWCNT and Co/MWCNT in the polyethylene matrix. The effect of MWCNT and Со/MWCNT on the final properties of the composite materials was determined. Introduction of MWCNT into the polyethylene matrix increases the specific electrical conductivity of the material. Such composite materials can be used for preparing concentrates with preset composition for the subsequent preparation of antistatic coatings. Introduction of the Со/MWCNT filler into the polyethylene matrix makes the material paramagnetic owing to Co nanoparticles and allows its use for preparing coatings that efficiently protect from electromagnetic radiation. 相似文献
80.
Oleksandr P. Demchuk Bohdan V. Bobovskyi Bohdan V. Vashchenko Dr. Oleksandr V. Hryshchuk Artem Skreminskyi Dr. Anton V. Chernykh Dr. Viktoriia S. Moskvina Dr. Olga V. Hordiyenko Prof. Dr. Dmitriy M. Volochnyuk Prof. Dr. Oleksandr O. Grygorenko 《European journal of organic chemistry》2023,26(24):e202300292
Synthesis and physicochemical characterization of all possible cis- and trans-1,3-disubstituted cyclobutane-derived amines and carboxylic acids bearing mono-, di- and trifluoromethyl groups at the C-3 position is disclosed. Tetramethylammonium fluoride (TMAF)- or morpholinosulfur trifluoride (Morph-DAST)-mediated nucleophilic fluorination of appropriate cis- and trans-diastereomeric substrates was used as the key step for the preparation of CH2F- and CHF2-substituted derivatives. To obtain the corresponding cis- and trans-isomeric CF3-substituted derivatives, resolution of known 3-(trifluoromethyl)cyclobutanecarboxylic acid (obtained as a mixture of diastereomers) was applied. The proposed procedures were suitable for the preparation of corresponding fluoroalkyl-substituted cyclobutane-derived amines and carboxylic acids on up to 50 g scale. All 12 building blocks obtained were characterized by measuring dissociation constants (pKa) and lipophilicities (LogP, for model derivatives) to evaluate the effect of the fluoroalkyl substituents on their physicochemical properties relevant to further drug discovery applications. 相似文献