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Ab initio modeling of dynamic stability of silicon prismanes

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dc.contributor.authorGimaldinova, M. A.
dc.contributor.authorKochaev, A. I.
dc.contributor.authorMaslov, M. M.
dc.contributor.authorГимальдинова, Маргарита Александровна
dc.contributor.authorМаслов, Михаил Михайлович
dc.date.accessioned2024-11-27T07:28:15Z
dc.date.available2024-11-27T07:28:15Z
dc.date.issued2020
dc.description.abstractWe present the results of a study on the dynamic stability of silabiprismanes by means of the density functional theory. Silabiprismanes present an elementary case of a particular type of silicon nanotubes with an extremely small cross-section, constructed from dehydrogenated molecules of cyclosilanes (silicon rings). Unlike higher polysilaprismanes, they are formed by only three silicon rings and described by the chemical formula (Si-n)(3) H-2n. In the presented study, we limited ourselves to the cases n = 5 divided by 7. We focused on a detailed review of the mechanisms of isomerization and decomposition. Configurations of the corresponding transition states were determined, and the kinetic parameters in the Arrhenius law (activation energy and frequency factor) were evaluated. Silabiprismanes are found to be much more stable compounds than their carbon analogous. Their lifetimes at room temperature achieve hundreds of seconds, but at 200 K, their stability increases significantly. Thus, their lifetimes are sufficiently high for the identifying and studying of silicon biprismanes, but not for their industrial applications. Therefore, unsubstituted silabiprismanes require lower temperatures of operation, and their applicability is restricted. Although the general pyrolysis path is the same for all considered cages, its features strongly and non-monotonically depend on n. It is confirmed that the hexagonal and heptagonal silabiprismanes are much more stable than the pentagonal one. We obtained the absence of a direct correlation between the thermodynamic and kinetic stabilities of the silicon cages under consideration.
dc.format.extentС. 283-287
dc.identifier.citationGimaldinova, M. A. Ab initio modeling of dynamic stability of silicon prismanes / Gimaldinova, MA, Kochaev, AI, Maslov, MM // Letters on Materials. - 2020. - 10. - № 3. - P. 283-287. - 10.22226/2410-3535-2020-3-283-287
dc.identifier.doi10.22226/2410-3535-2020-3-283-287
dc.identifier.urihttps://www.doi.org/10.22226/2410-3535-2020-3-283-287
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85090515858&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000562282200009
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/22260
dc.relation.ispartofLetters on Materials
dc.titleAb initio modeling of dynamic stability of silicon prismanes
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue3
oaire.citation.volume10
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