Probe-wavelength dependency of picosecond anti-Stokes Raman spectra of trans-stilbene in the S1 state

Takakazu Nakabayashi, Hiromi Okamoto, Mitsuo Tasumi

研究成果: Article査読

29 被引用数 (Scopus)

抄録

The picosecond anti-Stokes Raman spectra of trans-stilbene in the S1 state have been observed by using several probe wavelengths (580-670 nm) and a fixed pump wavelength giving a sufficient excess vibrational energy (≈5200 cm-1). The probe-wavelength dependency of the ratio of the anti-Stokes Raman-band intensity at 1180 cm-1 due to the C-Ph stretching (ν15) to that at 1570 cm-1 due to the olefinic C = C stretching (ν7) is analyzed by assuming a model based on the Franck-Condon mechanism. It has been shown from the anti-Stokes intensity analysis that vibrationally excited transients at 0 ps delay time are mostly on the lowest excited vibrational levels of the S1 state as far as the ν15 and ν7 modes are concerned, and the excess energy is not statistically distributed to other modes. A possible mechanism that accounts for this observation is discussed.

本文言語English
ページ(範囲)7189-7193
ページ数5
ジャーナルJournal of Physical Chemistry A
101
39
DOI
出版ステータスPublished - 1997 1 1
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学

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