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Time-Resolved FTIR Study on the Reaction of CHCl2 with NO2
Kun-hui Liu, Chun-fan Yang, Huan Wang, Wei-qiang Wu, Hong-mei Su *
State Key Laboratory of Molecular Reaction Dynamics, Beijing National Laboratory for Molecular Sci- ences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Abstract:
The environmentally important free radical reaction of chlorinated methyl CHCl2 with NO2 was investigated by step-scan time-resolved FTIR (TR-FTIR) emission spectroscopy. Vibrationally excited products of CHClO, NO, CO, and HCl are observed in the high-resolution IR emission spectra and three possible reaction channels are therefore elucidated. In particular,the product CO is newly detected and the product HCl is identified explicitly as a yield from the CHCl2+NO2 reaction, taking advantage of the sensitive detection of HCl and CO with TR-FTIR. These results are of particular interests to understand the related realistic chemical processes including atmospheric photochemistry, biofuel combustion, waste destruction,and smoking fire.
Key words:  TR-FTIR, Dichloromethyl, NO2, Reaction product channel
FundProject:
Time-Resolved FTIR Study on the Reaction of CHCl2 with NO2
刘坤辉, 杨春帆, 王欢, 吴为强, 苏红梅 *
中国科学院化学研究所分子反应动力学国家重点实验室,北京100190
摘要:
采用时间分辨傅立叶变换红外发射光谱(TR-FTIR)研究了环境化学中重要的氯代甲基CHCl2和NO2分子的反应. 通 过0.5 cm-1高分辨的TR-FTIR发射光谱观察到四种振动激发态产物CHClO、NO、CO和HCl,进而推测出CHCl2+NO2反应三个相应的产物通道. 其中,CO是CHCl2+NO2反应中首次观测到的产物,而HCl则是明确肯定存在的初级反应产物.
关键词:  时间分辨红外发射光谱,CHCl2,NO2,产物通道
DOI:10.1088/1674-0068/22/02/134-138
分类号: