Ultraviolet photoelectron spectra of Er 2@C 82 (I), Er 2@C 82 (III), Er 2C 2@C 82 (I) and Er 2C 2@C 82 (III)

Takafumi Miyazaki, Ryohei Sumii, Hisashi Umemoto, Haruya Okimoto, Yasuhiro Ito, Toshiki Sugai, Hisanori Shinohara, Takeyuki Zaima, Hajime Yagi, Shojun Hino

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16 Citations (Scopus)


Ultraviolet photoelectron spectra (UPS) and X-ray photoelectron spectra (XPS) of two erbium atoms and an erbium-carbide cluster entrapped fullerenes, Er 2@C 82 (I), Er 2@C 82 (III), Er 2C 2@C 82 (I) and Er 2C 2@C 82 (III), were measured using a synchrotron radiation light source and MgKα X-ray gun. The spectral onset energy of these endohedral fullerenes is around 0.8-0.9 eV, which is larger than that of Er@C 82 (I) of 0.4 eV. The UPS of erbium atoms encapsulated endohedral fullerenes having the same C 82 cage structure were analogous while those of the different cage structure are different. This finding supports an empirical rule that the electronic structure of the endohedral fullerenes is principally governed by the C 82 cage structure. The XPS Er4d 5/2 peak of Er 2@C 82 suggests the oxidation state of (Er 3+) 2 @C826-. The difference spectrum between the UPS of Er 2@C 82 (III) and Er 2C 2@C 82 (III) has the same C 3v structure reveals two excess electrons on the cage of Er 2@C 82.

Original languageEnglish
Pages (from-to)87-91
Number of pages5
JournalChemical Physics
Issue number1
Publication statusPublished - Mar 13 2012
Externally publishedYes


  • C
  • Electronic structure
  • Endohedral fullerenes
  • Ultraviolet photoelectron spectroscopy
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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