Polyradical Character and Spin Frustration in Fullerene Molecules: An Ab Initio Non-Collinear Hartree–Fock Study

Simple item page
dc.citation.firstpage9925
dc.citation.issueNumber42
dc.citation.journalTitleThe Journal of Physical Chemistry A
dc.citation.lastpage9940
dc.citation.volumeNumber118
dc.contributor.authorJiménez-Hoyos, Carlos A.
dc.contributor.authorRodríguez-Guzmán, R.
dc.contributor.authorScuseria, Gustavo E.
dc.date.accessioned2016-04-05T20:14:03Z
dc.date.available2016-04-05T20:14:03Z
dc.date.issued2014
dc.description.abstractMost ab initio calculations on fullerene molecules have been carried out on the basis of the paradigm of the Hückel model. This is consistent with the restricted nature of the independent-particle model underlying such calculations, even in single-reference-based correlated approaches. Notwithstanding, previous works on some of these molecules using model Hamiltonians have clearly indicated the importance of short-range interatomic spin–spin correlations. In this work, we consider ab initio non-collinear Hartree–Fock (HF) solutions for representative fullerene systems: the bowl, cage, ring, and pentagon isomers of C20, and the larger C30, C36, C60, C70, and C84 fullerene cages. In all cases but the ring we find that the HF minimum corresponds to a truly non-collinear solution with a torsional spin density wave. Optimized geometries at the generalized HF (GHF) level lead to fully symmetric structures, even in those cases where Jahn–Teller distortions have been previously considered. The nature of the GHF solutions is consistent with the π-electron space becoming polyradical in nature: each p-orbital remains effectively singly occupied. The spin frustration, induced by the presence of pentagon rings on an otherwise antiferromagnetic background, is minimized at the HF level by aligning the spins with non-collinear arrangements. The long-range magnetic ordering observed is reminiscent of the character of broken symmetry HF solutions in polyacene systems.
dc.identifier.citationJiménez-Hoyos, Carlos A., Rodríguez-Guzmán, R. and Scuseria, Gustavo E.. "Polyradical Character and Spin Frustration in Fullerene Molecules: An Ab Initio Non-Collinear Hartree–Fock Study." <i>The Journal of Physical Chemistry A,</i> 118, no. 42 (2014) American Chemical Society: 9925-9940. http://dx.doi.org/10.1021/jp508383z.
dc.identifier.doihttp://dx.doi.org/10.1021/jp508383z
dc.identifier.urihttps://hdl.handle.net/1911/88851
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.rightsThis is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_termsofuse.htmlen_US
dc.titlePolyradical Character and Spin Frustration in Fullerene Molecules: An Ab Initio Non-Collinear Hartree–Fock Study
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
jp508383z.pdf
Size:
2.75 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Center for Research Computing
Chemistry Publications
Physics and Astronomy Publications