Extremely slow intramolecular vibrational redistribution: Direct observation by time-resolved raman spectroscopy in trifluoropropyne

Intramolecular vibrational redistribution: from high-resolution spectra to real-time dynamics

“…The probable explanation of this difference was given in paper [183]. It coincides as a whole with the initial assumption made in paper [1] (see Section 3.3.1) that the dominant jhi state during IVR from the jyfi to the bath states (see Fig.…”

“…The last column in Table 6 also presents the IVR times from the jhi state estimated from formula (3.1). It is quite reasonable that these times, on the contrary, (The CIIVR rates were measured to be 8.5 ms À1 Torr À1 for HC CCH 2 Cl [182], and 10.1 ms À1 Torr À1 for HC CCF 3 [183].) The FWHM lengths of the 3330-cm À1 laser pump and 1.06-mm probe pulses were 20 and 37 ps, respectively.…”

“…As a whole, the same properties as in Section 4.2.3 were found, but with one important addition. Consider first papers [116,182,183] wherein those molecules were studied that did notreveal IVR incooled beams (see discussion in Section 3.3.1), The results are presented in Fig. 18.…”

“…r eff r vibÀrot . Because the maximum of the rotational distribution for given molecules at room temperature lies at J $ 30±45, it is clear that the majority of initially excited levels (populated states with one vibrational quantum added to the n HC mode) interact with the bath in which r vib 5 r vibÀrot (results from papers [116,182,183] illustrating this fact are presented in the third and fifth columns of Table 6). As a consequence, it is seen from Fig.…”

Intramolecular vibrational redistribution: from high-resolution spectra to real-time dynamics

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