Studies of the NH/sub 2/ + NO reaction by infrared kinetic spectroscopy

Journal Article · Thu May 22 00:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100402a047· OSTI ID:5569363

Hall, J L; Zeitz, D; Stephens, J W; Kasper, J V.V.; Glass, G P; Curl, R F; Tittel, F K

Infrared kinetic spectroscopy using excimer laser flash photolysis and color center laser probing has been used to study the NH/sub 2/ + NO reaction. The amidogen radical, NH/sub 2/, was produced by ArF photolysis of NH/sub 3/. Infrared absorptions of OH and H/sub 2/O were measured to determine the absolute contributions of the OH and H/sub 2/O product channels. It was found that the OH channel accounts for 13 +- 2% of the reaction. Using two different pairs of NH/sub 3/ and H/sub 2/O lines, we measured values of 0.85 +- 0.09 and 0.66 +- 0.03 for the ratio of H/sub 2/O formed to NH/sub 3/ photolyzed. All of the H/sub 2/O signals exhibit a pronounced induction period suggesting that H/sub 2/O is produced in very high vibrational states. The time evolution of low-lying vibrationally excited and ground vibrational state H/sub 2/O lines is adequately simulated by a model in which a stepwise sequential loss of vibrational energy occurs with quenching cross sections for each step proportional to excess energy.

• Research Organization: Rice Univ., Houston, TX
• DOE Contract Number: FG05-85ER13439
• OSTI ID: 5569363
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:11; ISSN JPCHA
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTROSCOPY
AMMONIA
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
EXCIMER LASERS
EXCITED STATES
EXPERIMENTAL DATA
GAS LASERS
GROUND STATES
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
INFRARED RADIATION
LASERS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATIONS
REACTION INTERMEDIATES
SPECTROSCOPY
VIBRATIONAL STATES