Comment on: Vibrational relaxation and spectral evoluton following ultrafast OH stretch excitation of water by A.Pakoulev, Z. Wang, D.D. Dlott

In a recent Letter by Pakoulev et al. [CPL 371 (2003) 594], time-resolved anti-Stokes Raman measurements of the spectral evolution and relaxation of the OH stretch vibrations of pure H₂O were presented. These measurements led the authors to reinterpret the results of previous femtosecond mid-infrared pump-probe studies on water. Here we show that this reinterpretation is incorrect.