Real-time spectroscopy of the excited-state excitons in porphyrin J-aggregates

Hideaki Kano, Takayoshi Kobayashi

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


The excited exciton (S2-exciton originating from the second-excited state of the molecules) was studied by realtime spectroscopy with 30-fs pulses. The ultrafast dynamics due to the S2-S1 internal conversion process were clearly observed in the pump-probe signal. The signal was modulated by the coherent molecular vibrations with 241 ± 4 cm-1 and 319 ± 4 cm-1 frequencies. The phase of the oscillation indicates that not only the ground state but also the excited state contribute to the oscillatory signal. The excited-state wave-packet motion was explained by dynamic intensity borrowing mechanism from the S2 ⇄ S0-transitions to the S1 ⇄ S0-transitions.

Original languageEnglish
Pages (from-to)1071-1074
Number of pages4
JournalBulletin of the Chemical Society of Japan
Issue number5
Publication statusPublished - May 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry


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