Spectral hole burning and evidence for vibrational energy migration of H-bonded molecules observed with transient infrared spectroscopy

Via intense ps-excitation of the OH-stretching vibration of ethanol diluted in CCl4 we succeed in spectral hole burning within the inhomogeneously bro adened oligomer band. The lifetime of the transient hole and the v = 1-leve l of the OH-stetch of associated ethanol molecules are determined to be abo ut 1.2 and 1.7 ps, respectively. Further dynamical features are discussed w hich give evidence for energy migration within the H-bonded ethanol chains and subsequent breaking of the oligomers into shorter fragments.