In:
The Journal of Chemical Physics, AIP Publishing, Vol. 109, No. 21 ( 1998-12-01), p. 9494-9501
Abstract:
Femtosecond transient absorption studies of I2–arene complexes, with arene=hexamethylbenzene (HMB), mesitylene (MST), or m-xylene (mX), are used to investigate the effect of solvent–solute attractive forces upon the rate of vibrational relaxation in solution. Comparison of measurements on I2–MST complexes in neat mesitylene and I2–MST complexes diluted in carbontetrachloride demonstrate that binary solvent–solute attractive forces control the rate of vibrational relaxation in this prototypical model of diatomic vibrational relaxation. The data obtained for different arenes demonstrate that the rate of I2 relaxation increases with the magnitude of the I2–arene attractive interaction. I2–HMB relaxes much faster than I2 in MST or mX. The results of these experiments are discussed in terms of both isolated binary collision and instantaneous normal mode models for vibrational relaxation.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
1998
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
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