Research on Chemical Intermediates

, Volume 24, Issue 8, pp 803–812 | Cite as

Discrimination of s-cis/s-trans conformers of jet-cooled methyl cinnamate by population labelling spectroscopy

  • Takayuki Ebata
  • Kei Saito
  • Haruki Ishikawa
  • Naohiko Mikami


The S1−S0 electronic spectrum of methyl cinnamate in a supersonic jet has been investigated to discriminate the transitions of the s-cis/s-trans conformers. Population labelling spectroscopy was applied to the conformer discrimination, and vibronic bands belonging to each conformer were identified. The relative population was estimated from the fluorescence quantum yields obtained by lifetime measurements. It was found that both conformers exist almost equally in a supersonic jet. The conformer identification of the vibronic bands was carried out based on the difference of the red-shift of their hydrogen-bonded complexes with methanol.


Fluorescence Quantum Yield Laser Induce Fluorescence Probe Laser Vibronic Band Total Decay Rate 
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Copyright information

© Springer 1998

Authors and Affiliations

  • Takayuki Ebata
    • 1
  • Kei Saito
    • 1
  • Haruki Ishikawa
    • 1
  • Naohiko Mikami
    • 1
  1. 1.Department of Chemistry, Graduate School of ScienceTohoku UniversitySendaiJapan

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