Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Denis A. Rychkov"'
Autor:
Aleksandr S. Dubok, Denis A. Rychkov
Publikováno v:
Crystals, Vol 13, Iss 4, p 617 (2023)
Pyrazinamide may exist in at least four known polymorphic forms, which were obtained experimentally. One of these polymorphs, (α), shows outstanding mechanical properties, demonstrating a significant anisotropic plasticity in a three-point bending t
Externí odkaz:
https://doaj.org/article/4e02a498e1824e50835587e01a3c5264
Publikováno v:
Crystals, Vol 12, Iss 8, p 1157 (2022)
The investigation of molecular crystals at high pressure is a sought-after trend in crystallography, pharmaceutics, solid state chemistry, and materials sciences. The di-p-tolyl disulfide (CH3−C6H4−S−)2 system is a bright example of high-pressu
Externí odkaz:
https://doaj.org/article/9146e5d7b146400482d0da0b95ae12d0
Autor:
Kseniya D. Skakunova, Denis A. Rychkov
Publikováno v:
Crystals, Vol 12, Iss 5, p 580 (2022)
The authors wish to update the Acknowledgments in their paper published in Crystals journal [...]
Externí odkaz:
https://doaj.org/article/62bb1a728f6c44adadd85639aaadb55d
Autor:
Kseniya D. Skakunova, Denis A. Rychkov
Publikováno v:
Crystals, Vol 11, Iss 12, p 1575 (2021)
The polymorphism of molecular crystals is a well-known phenomenon, resulting in modifications of physicochemical properties of solid phases. Low temperatures and high pressures are widely used to find phase transitions and quench new solid forms. In
Externí odkaz:
https://doaj.org/article/84f5c115ec154d178bf30ffaa85b94ca
Autor:
Denis A. Rychkov
Publikováno v:
Crystals, Vol 10, Iss 2, p 81 (2020)
High-pressure chemistry of organic compounds is a hot topic of modern chemistry. In this work, basic computational concepts for high-pressure phase transition studies in molecular crystals are described, showing their advantages and disadvantages. Th
Externí odkaz:
https://doaj.org/article/2c537adb072248c0bb1a7503dcb7beb8
Autor:
Nargiz B. Asanbaeva, Denis A. Rychkov, Sergey G. Arkhipov, Nikolay F. Uvarov, Pavel Yu. Tyapkin
Publikováno v:
Structural Chemistry. 32:1261-1267
The crystal and molecular structure of tris(tetrabutylammonium) pentanitratoplumbate(II) was determined and characterized by single-crystal and powder X-ray diffraction and IR spectroscopy. The structure is compared to other tetra-n-butylammonium-bas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d90bed3195b5dcbb70893ce5dcda5144
https://doi.org/10.1007/s11224-021-01732-y
https://doi.org/10.1007/s11224-021-01732-y
Autor:
Denis A. Rychkov, A. Yu. Fedorov
Publikováno v:
Journal of Structural Chemistry. 61:1356-1366
The study of the high-pressure behavior of molecular crystals helps find limits of their stability, as well as obtain previously unknown new phases. This may result in the creation of new materials and their forms for a variety of applications: pharm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6786541af449223ee0fb59df1dc5fa7c
https://doi.org/10.1134/s0022476620090024
https://doi.org/10.1134/s0022476620090024
Publikováno v:
Materials Today: Proceedings. 25:412-415
A simple crystallographic model for anomalously high plasticity of molecular crystal of L-Leucinium hydrogen maleate (LLHM) even at cryogenic temperatures was suggested. Based on our previous studies and literature data “sliding layers” mechanism
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f8fdfd04e8767328e5b0bc199f6ce8c
https://doi.org/10.1016/j.matpr.2019.12.137
https://doi.org/10.1016/j.matpr.2019.12.137
Autor:
Sergey G. Arkhipov, Denis A. Rychkov, Elizaveta A. Fedorova, Elena V. Boldyreva, Colin R. Pulham, Alexey Yu. Fedorov, Viktoria M. Zemtsova, Vasily S. Minkov, Callum Boa
Publikováno v:
Acta Crystallographica Section C Structural Chemistry. 75:1465-1470
We report the crystal structure and crystallization conditions of a first hydrated form of metacetamol (a hemihydrate), C8H9NO2·0.5H2O. It crystallizes from metacetamol-saturated 1:1 (v/v) water–ethanol solutions in a monoclinic structure (space g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8120ad73006dff861350c3093c909df7
https://doi.org/10.1107/s2053229619012981
https://doi.org/10.1107/s2053229619012981
Publikováno v:
Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials. 75:143-151
L-Leucinium hydrogen maleate crystals are very plastic at ambient conditions. Here it is shown that this plasticity is preserved at least down to 77 K. The structural changes in the temperature range 293–100 K were followed in order to rationalize
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3157a2d7d6acb38ce5a9858cb3d12772
https://doi.org/10.1107/s2052520619000441
https://doi.org/10.1107/s2052520619000441