物理化学学报 >> 1998, Vol. 14 >> Issue (07): 597-600.doi: 10.3866/PKU.WHXB19980705

研究论文 上一篇    下一篇

CH2(X 3B1)自由基与O2的反应

苏红梅, 毛文涛, 何勇, 徐立进, 孙亚, 孔繁敖   

  1. 中国科学院化学研究所分子反应动力学国家重点实验室，北京 100080
  • 收稿日期:1997-10-27 修回日期:1997-12-30 发布日期:1998-07-15
  • 通讯作者: 孔繁敖

Study of the Reaction CH2(X 3B1)+O2

Su Hong-Mei, Mao Wen-Tao, He Yong, Xu Li-Jin, Sun Ya, Kong Fan-Ao   

  1. The State Key Laboratory of Molecular Reaction Dynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080
  • Received:1997-10-27 Revised:1997-12-30 Published:1998-07-15
  • Contact: Kong Fan-Ao

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摘要：

用时间分辨富里叶红外发射谱仪（TR-FTIRS），研究了CH2(X3B1)自由基与O2反应的通道及产物的振动态布居．基电子态CH2(X3B1)自由基由351nm紫外激光光解CH2CO生成．观测到振动激发态反应产物CO（v≤10）、CO2（ν3≤7）、OH（H2O）和H2CO的红外发射，证实存在生成H2CO的通道．由光谱拟合得到不同时刻CO（v）和CO2（ν3）的相对振动布居，发现v＝4能级的布居数相对于v3≤3能级有明显反转．

关键词: CH2, O2, 反应, TR-FTIRS

Abstract:

The reaction of methylene radical CH2(X3B1)with molecular oxygen was investigated with Time-Resolved Fourier Transform Infrared spectrometer(TR-FTIRS). Pure CH2(X3B1)radicals were produced by UV photolysis of ketene at 351nm. Vibrationally excited products OH(or H2O) and H2CO were observed in the infrared emission spectra. The H2CO channel was verified as a product of elementary reaction. The nascent vibrational distribution of CO and CO2 were obtained. The most populated vibrational level was v=4 for both the CO and CO2.

Key words: CH2, O2, Reaction, TR-FTIRS