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化学学报
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化学学报 ›› 1993, Vol. 51 ›› Issue (9): 903-909. 上一篇    下一篇

研究论文

氟原子与溴代甲烷反应化学发光研究

储焰南;周士康;詹明生;杨新;刘军;宋芳青;史济良   

  1. 中国科学院安徽光学精密机械研究所;激光光谱学开放实验室;中国科学院上海有机化学研究所
  • 发布日期:1993-09-15

Study on chemiluminescence from reactions of f atom with bromine substitute methane

CHU YANNAN;ZHOU SHIKANG;ZHAN MINGSHENG;YANG XIN;LIU JUN;SONG FANGQING;SHI JILIANG   

  • Published:1993-09-15

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316

被引次数

7 | 2

用光子计数技术系统地探测了F(^2P)原子与溴代甲烷等(CH~3Br、CH~2Br~2和CHBr~3)反应在各种压力下的可见区(300～900nm)化学发光,得到HF电子基态振动泛频跃迁及 Br~2(B)、BrF(B)、CHF(A)、CH(A) 等分子电子激发态跃迁的发射谱.求出HF(υ=3)转动温度为480K,计算机模拟光谱获得了Br~2(B)的振动布居.对比F与氯代甲烷反应的机理分析表明,初级反应主要是F提取形成HF,多级反应产生了电子激发态的产物分子.

关键词: 甲烷 P, 反应机理, 氟, 溴代烃, 光谱分析, 激发态, 化学发光反应, 电子跃迁, 气相反应

Visible chemiluminescence in the region 300~900 nm was measured from reactions of F(2P) atoms with CH3Br, CH2Br2 and CHBr2 at various pressures using crossed mol. beam setup. Emissions were observed from vibrationally excited HF(X) and from electronically excited Br2(A or B), BrF(B), CHF(A) and CH(A). The rotational temperature of HF(X) was obtained to be 480 K. The relative vibrational populations of Br2(B) and BrF(B) were solved by computer simulated spectrum. The reaction mechanism was discussed; the primary reaction is mainly the channel of H abstraction, and multistage processes produce electronically activated mols.

Key words: METHANE P, REACTION MECHANISM, FLUORINE, BROMOHYDROCARBON, SPECTROGRAPHIC ANALYSIS, EXCITED STATE, CHEMILUMINESCENCE REACTION, ELECTRON TRANSITION, GAS PHASE REACTION

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