We have directed a supersonic beam of atomic oxygen containing a large concentration of ground-state O(3P) and a small percentage of electronically excited O(1D) at a continuously refreshed liquid Ðlm of a long-chain saturated hydrocarbon, squalane (C Angularly resolved Ñux and energy dis- 30H62). tributions of reactively scattered products revealed that the dominant volatile reaction product is the OH radical, which can be formed by an EleyÈRideal direct-reaction mechanism or by a process that leads to trapping and desorption of the initial product. Both of these processes occur with comparable probabilities. A second product, H is thought to be 2O, formed by abstraction of a hydrogen atom from the hydrocarbon chain by the primary OH product. The H product also exits the surface via non- 2O thermal and thermal mechanisms, although the thermal mechanism dominates.
REACTIVE SCATTERING OF GROUND-STATE AND ELECTRONICALLY EXCITED OXYGEN ATOMS ON A LIQUID HYDROCARBON SURFACE
BALUCANI, Nadia;CASAVECCHIA, Piergiorgio;VOLPI, GIAN GUALBERTO
1997
Abstract
We have directed a supersonic beam of atomic oxygen containing a large concentration of ground-state O(3P) and a small percentage of electronically excited O(1D) at a continuously refreshed liquid Ðlm of a long-chain saturated hydrocarbon, squalane (C Angularly resolved Ñux and energy dis- 30H62). tributions of reactively scattered products revealed that the dominant volatile reaction product is the OH radical, which can be formed by an EleyÈRideal direct-reaction mechanism or by a process that leads to trapping and desorption of the initial product. Both of these processes occur with comparable probabilities. A second product, H is thought to be 2O, formed by abstraction of a hydrogen atom from the hydrocarbon chain by the primary OH product. The H product also exits the surface via non- 2O thermal and thermal mechanisms, although the thermal mechanism dominates.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
