Abstract
A pump-probe experiment was performed to examine vibrational population relaxation of diiodomethane (CH2I2) molecule dissolved in supercritical CO2. Using an apparatus with femtosecond time resolution, we observed the contributions of intramolecular vibrational energy redistribution (IVR) and intermolecular vibrational energy transfer (VET) separately. IVR and VET rates were measured with varying solvent densities at a constant temperature. It is shown that the IVR rate is not density dependent while the VET rate increases with increasing density from 0.4 to 0.8 g cm-3. This observation suggests that the rate of the VET process is determined by solute-solvent collisions whereas the IVR rate is not much affected by solute-solvent interaction.
| Original language | English |
|---|---|
| Pages (from-to) | 84-90 |
| Number of pages | 7 |
| Journal | Chemical Physics Letters |
| Volume | 356 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 2002 Apr 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Spectroscopy
- Atomic and Molecular Physics, and Optics
Cite this
Intramolecular and intermolecular vibrational energy relaxation of CH2I2 dissolved in supercritical fluid. / Sekiguchi, K.; Shimojima, Atsushi; Kajimoto, O.
In: Chemical Physics Letters, Vol. 356, No. 1-2, 15.04.2002, p. 84-90.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Intramolecular and intermolecular vibrational energy relaxation of CH2I2 dissolved in supercritical fluid
AU - Sekiguchi, K.
AU - Shimojima, Atsushi
AU - Kajimoto, O.
PY - 2002/4/15
Y1 - 2002/4/15
N2 - A pump-probe experiment was performed to examine vibrational population relaxation of diiodomethane (CH2I2) molecule dissolved in supercritical CO2. Using an apparatus with femtosecond time resolution, we observed the contributions of intramolecular vibrational energy redistribution (IVR) and intermolecular vibrational energy transfer (VET) separately. IVR and VET rates were measured with varying solvent densities at a constant temperature. It is shown that the IVR rate is not density dependent while the VET rate increases with increasing density from 0.4 to 0.8 g cm-3. This observation suggests that the rate of the VET process is determined by solute-solvent collisions whereas the IVR rate is not much affected by solute-solvent interaction.
AB - A pump-probe experiment was performed to examine vibrational population relaxation of diiodomethane (CH2I2) molecule dissolved in supercritical CO2. Using an apparatus with femtosecond time resolution, we observed the contributions of intramolecular vibrational energy redistribution (IVR) and intermolecular vibrational energy transfer (VET) separately. IVR and VET rates were measured with varying solvent densities at a constant temperature. It is shown that the IVR rate is not density dependent while the VET rate increases with increasing density from 0.4 to 0.8 g cm-3. This observation suggests that the rate of the VET process is determined by solute-solvent collisions whereas the IVR rate is not much affected by solute-solvent interaction.
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UR - http://www.scopus.com/inward/citedby.url?scp=0037090194&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(02)00371-8
DO - 10.1016/S0009-2614(02)00371-8
M3 - Article
VL - 356
SP - 84
EP - 90
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 1-2
ER -