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Chemical bonding between thorium atoms and a carbon hexagon in carbon nanomaterials

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dc.contributor.authorBibikov, A. V.
dc.contributor.authorNikolaev, A. V.
dc.contributor.authorTkalya, E. V.
dc.contributor.authorНиколаев, Александр Васильевич
dc.contributor.authorТкаля, Евгений Викторович
dc.date.accessioned2024-11-27T09:01:11Z
dc.date.available2024-11-27T09:01:11Z
dc.date.issued2020
dc.description.abstractWe explore the unusual nature of chemical bonding of thorium atoms with a ring of six carbon atoms (hexagon) in novel carbon materials. Our ab initio calculations of Th-based metallofullerenes (Th@C60 and Th@C20) and Th bound to benzene or coronene at the Hartree-Fock level with the second order perturbation (MP2) correction accounting for the van der Waals interactions demonstrate that the optimal position of the thorium atom is where it faces the center of a hexagon and is located at a distance of 2.01-2.07 Å from the center. For Th encapsulated in C60 it is found at 2.01 Å, whereas the other local energy minima are shifted to larger energies (0.22 eV and higher). Inside C60 the highest local minimum at 1.17 eV is observed when Th faces the center of the five member carbon ring (pentagon). Based on our calculations for Th with benzene and coronene where the global minimum for Th corresponds to its position at 2.05 Å (benzene) or 2.02 Å (coronene) from the hexagon center, we conclude that a well pronounced minimum is likely to be present in graphene and in a single wall carbon nanotube. The ground state of Th is singlet, and other high spin states (triplet and quintet) lie higher in energy (>1.62 eV). We discuss a potential use of carbon nanomaterials with the 229Th isotope having its nuclear transition in the optical range, for metrological purposes.
dc.format.extentС. 22501-22507
dc.identifier.citationBibikov, A. V. Chemical bonding between thorium atoms and a carbon hexagon in carbon nanomaterials / Bibikov, A.V., Nikolaev, A.V., Tkalya, E.V. // Physical Chemistry Chemical Physics. - 2020. - 22. - № 39. - P. 22501-22507. - 10.1039/d0cp03970e
dc.identifier.doi10.1039/d0cp03970e
dc.identifier.urihttps://www.doi.org/10.1039/d0cp03970e
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85093539139&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000581179800032
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/22489
dc.relation.ispartofPhysical Chemistry Chemical Physics
dc.titleChemical bonding between thorium atoms and a carbon hexagon in carbon nanomaterials
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue39
oaire.citation.volume22
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