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The Production and Dispersed Laser Induced Fluorescence Spectrum of Dibromocarbene in Gas Phase
Zhang Xianyi,Kong Xianglei,Luo Xiaoling,Pei Kemei,Kan Ruifeng,Li Haiyang*
Author NameAffiliationE-mail
Zhang Xianyi Laboratory of Environmental SpectroscopyAnhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031Department of PhysicsAnhui Normal UniversityWuhu 241000  
Kong Xianglei Laboratory of Environmental SpectroscopyAnhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031  
Luo Xiaoling Laboratory of Environmental SpectroscopyAnhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031  
Pei Kemei Laboratory of Environmental SpectroscopyAnhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031  
Kan Ruifeng Laboratory of Environmental SpectroscopyAnhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031  
Li Haiyang* Laboratory of Environmental SpectroscopyAnhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031 hli@aiofm.ac.cn 
Abstract:
Dispersed laser induced fluorescence spectra of gas-phase CBr2 and Br2 produced by the reaction of F atom with CH2Br2 in the microwave discharge flow tube apparatus have been measured. The dispersed fluorescence spectrum excited at 571.9 nm was assigned to A(0,13,0)→X(0,v2",0)( v2"=16)transitions of CBr2,the fundamental vibrational frequencies of bending mode of gas - phase CBr2 in electronic ground state was firstly derived from the spectrum to be v2"=215 cm-1 . The dispersed fluorescence spectrum excited at 575. 3 nm was assigned to B3Π+u →X1Σ+g transitions of Br2 . The generation of CBr2 and Br2 species is believed to be the second or third step reaction of F atom with CH2Br2 .
Key words:  CBr2,Dispersed laser induced fluorescence spectrum,Gas-phase reaction
FundProject:国家自然科学基金资助项目(20073046).
气相CBr2 自由基的产生及激光诱导荧光色散谱研究
张先牋,孔祥蕾,罗晓琳,裴克梅,阚瑞峰,李海洋*
摘要:
利用双层流动反应管作为束源,研究了F与CH2Br2反应生成的CBr2和Br2的气相激光诱导荧光色散谱,将得到的谱线分别指定为CBr2的(0,13,0)→(0,v2″,0)(v2″=1~6)跃迁和Br2的 3Π+u→ 1Σ+g跃迁,从光谱中首次得到气相CBr2自由基基态弯曲振动频率ν2″=215 cm-1,实验确认了CBr2自由基和Br2是F+CH2Br2过程多步反应的产物.
关键词:  
DOI:10.1088/1674-0068/15/3/203-206
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