Intramolecular vibrational redistribution of CH2I2 dissolved in supercritical Xe

K. Sekiguchi, Atsushi Shimojima, O. Kajimoto

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Abstract

Intramolecular vibrational energy redistribution (IVR) of CH2I2 in supercritical Xe has been studied. The first overtone of the C-H stretching mode was excited with a near infrared laser pulse and the transient UV absorption near 390 nm was monitored. Signals showed a rise and decay profile, which gave the IVR and VET (intermolecular vibrational energy transfer) rates, respectively. Solvent density dependence of each rate was obtained by tuning the pressure at a constant temperature. The IVR rate in supercritical Xe increased with increasing solvent density and asymptotically reached a limiting value. This result suggests that the IVR process of CH2I2 in condensed phase is a solvent-assisted process.

Original languageEnglish
Pages (from-to)303-308
Number of pages6
JournalChemical Physics Letters
Volume370
Issue number3-4
DOIs
Publication statusPublished - 2003 Mar 14
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

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