Search for Lowest-Energy Nonclassical Fullerenes III: C22

Chad Killblane, Yi Gao, Nan Shao, Xiao Cheng Zeng

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Density functional and second-order Møller-Plesset perturbation (MP2) methods were employed in the investigation of low-lying C22 isomers. All cage structures with four- , five-, six-, and seven-membered rings were examined with the monocyclic ring, bowl, and other noncage structures. Cage isomers were first identified via graph theoretical methods, and noncages were identified by basin-hopping methods. Initial isomer screenings were carried out at the PBE/DND level of theory. Low-lying isomers, within 0.6 eV of the predicted lowestenergy isomer, were further evaluated at the PBElPBE/cc-pVTZ and MP2/cc-pVTZ levels. Our results confirm that the cage structures are more stable than the ring structure and the bowl structure. The lowest-energy structure for C22 is predicted to be the C22-I cage containing one four-membered ring. Anion photoelectron and optical spectra of the six lowest-lying isomers are also computed.

Original languageEnglish (US)
Pages (from-to)8839-8844
Number of pages6
JournalJournal of Physical Chemistry A
Volume113
Issue number31
DOIs
StatePublished - Aug 6 2009

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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