Vibrational relaxation of OH and OD stretching vibrations of phenol and its clusters studied by IR--UV pump-probe spectroscopy

Research was done on the vibrational relaxation of the OH/OD stretching mode of phenol and its cluster with Ar or H2O which had been examined directly by nanosecond IR--UV pump--probe spectroscopy. In conclusion, the experiment on the phenol--Ar and phenol--H2O reveal the OH stretching level, which showed a fast single exponential decay curve, indicating a transformation from intermediate coupling to the statistical limit upon the cluster formation.