O2(X 3σg−, ν = 8) 与CF4碰撞时的高效振动弛豫
Efficient vibrational relaxation of O2(X 3sigma(g)-, nu = 8) by collisions with CF4.
作者信息
Yamasaki Katsuyoshi, Fujii Hidekazu, Watanabe Shinji, Hatano Takayuki, Tokue Ikuo
机构信息
Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.
出版信息
Phys Chem Chem Phys. 2006 Apr 28;8(16):1936-41. doi: 10.1039/b516695k. Epub 2006 Mar 14.
A laser flash photolysis-laser-induced fluorescence (LIF) technique has been employed to study the relaxation kinetics of vibrationally excited O2(X 3sigma(g)-. The time-resolved LIF excited B 3sigma(u)(-)-X 3sigma(g)- system has been recorded and analyzed by the integrated-profiles method. The rate coefficient for vibrational relaxation of O2(X 3sigma(g)-, nu = 8) by collisions with CF(4), [1.4 +/- 0.3(2sigma)] x 10(-11) cm3 molecule(-1) s(-1), indicates that CF4 is an efficient relaxant of O2(X 3sigma(g)- and that the propensity rule for O2 relaxation suggested by Mack et al. (J. A. Mack, K. Mikulecky and A. M. Wodtke, J. Chem. Phys., 1996, 105, 4105) has been observed experimentally.
采用激光闪光光解 - 激光诱导荧光（LIF）技术研究了振动激发态O₂(X³Σg⁻)的弛豫动力学。通过积分轮廓法记录并分析了时间分辨的LIF激发B³Σu⁻ - X³Σg⁻系统。O₂(X³Σg⁻, ν = 8)与CF₄碰撞的振动弛豫速率系数为[1.4 ± 0.3(2σ)]×10⁻¹¹ cm³·分子⁻¹·s⁻¹，这表明CF₄是O₂(X³Σg⁻)的有效弛豫剂，并且实验观察到了Mack等人（J. A. Mack, K. Mikulecky和A. M. Wodtke, J. Chem. Phys., 1996, 105, 4105）提出的O₂弛豫的倾向规则。
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