Knowledge Bank

The results of studies of the density and temperature effects an the Raman line shapes of the $\nu (A1)$ C-H and C-D stretching fundamentals in several molecular liquid such as $CHCl3,CDCl3,C6H6,C6D6,CH3CN,CD3CN3,CD3OH,CH3OH$, etc., are summarized and reviewed. The vibrational relaxation rates are obtained from the isotropic component of the Raman band and the experimental data are Interpreted in terms of the Kubo stochastic line-shape theory and the collinear-isolated-binary-collision model for dephasing. The importance of the separation of the effects of density and temperature on vibrational relaxation is emphasized."