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化学学报
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化学学报 ›› 1998, Vol. 56 ›› Issue (9): 914-919. 上一篇    下一篇

研究论文

F~2, F与I~2的化学发光反应

吴成印;储焰南;曹德兆   

  1. 中国科学院安徽光学精密机械研究所.合肥(230031);中国科学院激光光谱学开 放实验室
  • 发布日期:1998-09-15

Chemiluminescent reactions of F~2 and F atoms with I~2 molecules

Wu Chengyin;Chu Yannan;Cao Dezhao   

  1. Anhui Inst Opt & Fine Mech, Acad Sinica.Hefei(230031)
  • Published:1998-09-15

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在流动余辉实验装置上,研究了F~2,F与I~2的化学发光反应。首次在F+I~2反应体系中观察到较强的IF(B→X)发射光谱,采用简单碰撞理论对IF(B)的振动驰豫进行估算后,得到了其振动布居,发现与F~2+I~2反应体系有明显的不同,从而推测这两个反应的激发态产物IF(B)是由不同的反应通道形成的。前者由初级反应产物I~2F与F原子进一步作用产生,而后者则由激发态的I(^2p~1~/~2)与基态的F(^2p~3~/~2)碰撞复合产生。

关键词: 化学发光反应, 氟, 碘, 流动余辉, 化学激光器, 介质, 发射光谱分析, 振动驰豫, 反应机理

In order to obtain high concentration of IF(B) through chemical ways, we studied the chemiluminescent reactions of F~2, F with I~2 in the flowing afterglow apparatus. Strong emission spectrum IF(B-X) was firstly observed in the F/I~2 system. Simple collision theory was used to estimate the IF(B) vibrational energy relaxation in inert gas. The vibrational population distribution of the excited state IF(B) was measured. Compared the IF(B) vibrational distribution of different systems, we conclude that IF(B) were produced through different reaction mechanisms in the reactions of F~2, F with I~2. The former proceeds via a secondary, reactive encounter of the F atom with the stable thrialogen intermediate I~2F, whearas the latter may be the recombination reaction of spin-orbit excited iodine atoms with ground fluorine atoms.

Key words: CHEMILUMINESCENCE REACTION, FLUORINE, IODINE, CHEMICAL LASER, MEDIA, EMISSION SPECTROGRAPHIC ANALYSIS, VIBRATION RELAXATION, REACTION MECHANISM

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