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

Hideaki Kano; Takayoshi Kobayashi

doi:10.1246/bcsj.75.1071

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

Hideaki Kano, Takayoshi Kobayashi

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	1071-1074
Number of pages	4
Journal	Bulletin of the Chemical Society of Japan
Volume	75
Issue number	5
DOIs	https://doi.org/10.1246/bcsj.75.1071
Publication status	Published - May 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)

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10.1246/bcsj.75.1071

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title = "Real-time spectroscopy of the excited-state excitons in porphyrin J-aggregates",

abstract = "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.",

author = "Hideaki Kano and Takayoshi Kobayashi",

year = "2002",

month = may,

doi = "10.1246/bcsj.75.1071",

language = "English",

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pages = "1071--1074",

journal = "Bulletin of the Chemical Society of Japan",

issn = "0009-2673",

publisher = "The Chemical Society of Japan",

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T1 - Real-time spectroscopy of the excited-state excitons in porphyrin J-aggregates

AU - Kano, Hideaki

AU - Kobayashi, Takayoshi

PY - 2002/5

Y1 - 2002/5

N2 - 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.

AB - 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.

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M3 - Article

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EP - 1074

JO - Bulletin of the Chemical Society of Japan

JF - Bulletin of the Chemical Society of Japan

IS - 5

ER -

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

Abstract

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