Acta Chimica Sinica ›› 2001, Vol. 59 ›› Issue (5): 643-647. Previous Articles     Next Articles

Original Articles

亚稳分子O~2(b^1∑^+~g)猝灭反应研究

宁利新;程平;王鸿梅;曹德兆;储焰南   

  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
  • 出版日期:2001-05-15 发布日期:2001-05-15

Study on quenching reactions of metastable O~2(b^1∑^+~g)

Ning Lixin;Cheng Ping;Wang Hongmei;Cao Dezhao;Chu Yannan   

  1. Anhui Inst Opt & Fine Mech, Acad Sinica.Hefei(230031)
  • Online:2001-05-15 Published:2001-05-15

Metastable O~2 in the b^1∑^+~g state has been prepared in aflowing after -glow reactor by oxygen atoms reacombination on a nikel surface at 300K. By using the pesudo -first -order method, total quenching tate constanbts for 15 molecules are measured to be the range of 10^- 12~10^-14cm^3·molecule^-1·s^-1,with those for metastable O~2(b^1∑ ^+~g) reactions with CH~2Cl~2, CHCl~3, CH~3CN, C~2H~4Cl~2,C~2H~2Cl~4 C~3H~7NH~2,(C~2H~5)~2NH and C~6H~6 being known for the first time. An electronic ----to ---vibrational (E--V) energy transfer model analysis shows that O~2(b^1∑^+~g) quenching reaction rate constant is clorrelated with terminal bond number of x----h(x=c, n, o) bond within a quenching reagent molecule. Iur experimental measurement also demonstrates that a completely theoretical description of O~2 (b^1∑^+~g) quenching reaction mechanism needs to further consider other characteristics of reagent molecules.

Key words: METASTABLE STATES, OXYGEN, REACTION RATE CONSTANT

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