Pump- and probe-wavelength dependencies of picosecond anti-stokes Raman spectrum of trans-stilbene in the S1 state

Takakazu Nakabayashi, Hiromi Okamoto, Mitsuo Tasumi

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Vibrational relaxation dynamics of trans-stilbene in the S1 state immediately after photoexcitation is studied by picosecond time-resolved anti-Stokes Raman spectroscopy with several pump and probe wavelengths. Pump-wavelength dependence of the anti-Stokes spectrum indicates that, when pump photons with high excess energy (≈5200cm-1) are used, the anti-Stokes Raman bands at 0 ps delay time arise from vibrationally excited transients with excess vibrational energy not thermally distributed in the molecule. Probe-wavelength dependence suggests that the vibrationally excited transients at 0 ps are mostly on the lowest excited vibrational levels, as far as the olefinic C = C stretching and the C-Ph stretching modes are concerned. The vibrational relaxation process of S1 trans-stilbene is discussed on the basis of the observed results.

本文言語English
ページ(範囲)75-78
ページ数4
ジャーナルLaser Chemistry
19
1-4
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 生化学
  • 分光学

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