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| 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). |
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| 气相CBr2 自由基的产生及激光诱导荧光色散谱研究 |
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张先牋,孔祥蕾,罗晓琳,裴克梅,阚瑞峰,李海洋*
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| 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 |
| 分类号: |