Ups of buckminsterfullerene and other large clusters of carbon

S. H. Yang*, C. L. Pettiette, J. Conceicao, O. Cheshnovsky, R. E. Smalley

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Ultraviolet photoelectron spectra (UPS) are reported for mass-selected negative carbon clusters extracted from a pulsed supersonic beam. In the size range from 48 to 84 atoms, three clusters were found to be closed-shell species with appreciable HOMO-LUMO gaps: C50(0.3-0.6 eV), C60 (1.5-2.0 eV), and C70 (0.7-1.2 eV). UPS data for all other clusters revealed no appreciable HOMO-LUMO gap, indicating they are either open-shell species, or closed-shell species with small HOMO-LUMO gaps. Buckminsterfullerene (C60) was found to have the lowest electron affinity (2.6-2.8 eV) of any cluster. Agreement between these UPS data and electronic structure calculations strongly support the spheroidal shell model for C60.

Original languageEnglish
Pages (from-to)233-238
Number of pages6
JournalChemical Physics Letters
Issue number3-4
StatePublished - 28 Aug 1987
Externally publishedYes


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