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Citation: Ren Li, Kong Fan-Ao. A Study of the Reaction of OH radical with CO by Time-resolved FTIR Spectroscopy[J]. Acta Physico-Chimica Sinica, ;2002, 18(06): 486-489. doi: 10.3866/PKU.WHXB20020602 shu

A Study of the Reaction of OH radical with CO by Time-resolved FTIR Spectroscopy

Ren Li ,
Kong Fan-Ao

1.
State Key Laboratory of Molecular Reaction, Institute of Chemistry, Chinese Academy of Sciences, Beijing　100080

Received Date: 3 March 2002
Available Online: 15 June 2002

The reaction of OH radical with CO was investigated by time-resolved Fourier transform infrared (TR-FTIR) spectroscopy. OH radical was produced by laser photolysis of HNO3 at 248 nm. IR emission from vibrationally excited unsymmetric stretching mode (ν3) of product CO2 was observed for the first time (Fig.2). The simulated results for the IR emission spectrum of CO2 shows that the CO2 populates up to v=6 and the quantum number v=2 is the most populated vibration level (Fig.4). Comparison of the experimental distribution results of product CO2 with quantum or QCT calculation by Schatz and co-workers shows that experimental distributions agree well with the quantum predicting but is different from that of the QCT calculation. This consistency suggests that the SFH potential surface (Fig.1) is accurate and the quantum dynamics method but not QCT is proper approach for the chemical reaction involving H atom leaping.
- TR-FTIR;OH radical;CO;CO₂;reaction
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