Journal of Physical Chemistry p. 3253 - 3259 (1987)
Update date:2022-08-11
Topics:
Wantuck, Paul J.
Oldenborg, Richard C.
Baughcum, Steven L.
Winn, Kenneth R.
Room temperature rate constants for collisional quenching of CH3O(A2A1) have been measured for 20 collision partners.Methoxy radicals are produced by 248-nm photolysis of CH3ONO and the CH3O(A2A1) is produced by exciting the A-X transition using a pulsed dye laser.Rate constants are determined by monitoring the time-resolved fluorescence signal as a function of quenching gas pressure.The experimental quenching cross sections are best correlated in terms of the CH3O-collision partner interaction well depth.Reasonable correlation is observed for 15 quenching gases, but several exceptions are apparent.A similar trend in collision partner quenching efficiency for OH(A2Σ+) and CH3O(A2A1) is noted and discussed.
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