Product Studies of Inelastic and Reactive Collisions of NH2+NO: Effects of Vibrationally and Electronically Excited NH2

Published

September 1, 2002

Author(s)

T P. Marcy, Dwayne E. Heard, S R. Leone

Abstract

The reaction between NH₂ and NO has been studied by time-resolved step-scan Fourier transform infrared (FTIR) emission spectroscopy.We observe time-dependent emission from vibrationally excited NO, N₂O and H₂O arising from the interaction of NO with initially vibrationally and electronically excited NH₂ produced by the 193 nm laser photolysis of ammonia. The excited NH₂ gives rise to a rapidly decaying emission signal. The correlated time dependences of the vibrationally excited NO and N₂O signals suggest that they are formed by direct collisions of NO with the vibrationally and electronically excited NH₂. There is sufficient excitation of the NH₂ to overcome the high barrier to N₂Oformation. The emission from vibrationally excited H₂0 shows that its formation is delayed, with a significant induction period. The time dependence of the H₂0 induction period matches well to the decay of emissions from the Ņ₁ and Ņ₃ bands of NH₂ suggesting that the NH₂ is deactivated to its ground electronic and bibrational state before it produces the water product by reacting with NO.

Citation

Journal of Physical Chemistry A

Volume

106

Issue

No. 36

Pub Type

Journals

Keywords

De-No_x, NH₂+NO

Citation

Marcy, T. , Heard, D. and Leone, S. (2002), Product Studies of Inelastic and Reactive Collisions of NH₂+NO: Effects of Vibrationally and Electronically Excited NH₂, Journal of Physical Chemistry A (Accessed July 26, 2024)