Energy transfer from highly vibrationally excited azulene and azulenehyphen;d8to carbon dioxide

摘要

Timehyphen;resolved diode laser absorption spectroscopy has been used to study vibrationalhyphen;tohyphen;vibrational energy transfer from highly excited azulene and azulenehyphen;d8to carbon dioxide. The energetic azulene molecules were prepared by internal conversion (S2rarr;S0) after excitation into theS2state by a pulsed laser source of 337 nm photons. Relative populations of CO2vibrational modes were determined and compared with predictions of a statistical model. The total vibrational energy transferred to CO2was determined to be about 25percnt; of the initial azulene energy. Similar experiments were carried out using 248 nm photons to excite azulene in the region of theS4state.