Singlet excited state (S1) of higher fullerenes C76 and C84: Correlation between lifetime and HOMO-LUMO energy gap

Hyun Sun Cho, Tae Kyu Ahn, Sung Ik Yang, Seung Min Jin, Dongho Kim, Seong Keun Kim, Hong Doo Kim

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Photophysical properties of higher fullerenes C76 and C84 were investigated in toluene by steady-state and transient absorption spectroscopy. Lifetimes of 75 and 35 ps were measured for the lowest excited state of C76 and C84, respectively, which are much shorter than the values estimated from previous triplet-triplet absorption studies. It was found that the internal conversion rate constants, kIC, increased as the size of fullerene increased, and that kIC was strongly correlated with the HOMO-LUMO energy gap, ΔEg. From this correlation, an empirical relationship was obtained: log kIC (s-1)=14.59 - 3.39 ΔEg (eV).

Original languageEnglish
Pages (from-to)292-298
Number of pages7
JournalChemical Physics Letters
Volume375
Issue number3-4
DOIs
Publication statusPublished - 2003 Jul 3

All Science Journal Classification (ASJC) codes

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

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