Zagidullin M V, Khvatov N A, Medvedkov I A, Tolstov G I, Mebel A M, Heaven M C, Azyazov V N
Samara National Research University , Samara 443086, Russia.
Lebedev Physical Institute , Samara 443011, Russia.
J Phys Chem A. 2017 Oct 5;121(39):7343-7348. doi: 10.1021/acs.jpca.7b07885. Epub 2017 Sep 26.
Rate constants for the removal of O(bΣ) by collisions with O, N, CO, and HO have been determined over the temperature range from 297 to 800 K. O(bΣ) was excited by pulses from a tunable dye laser, and the deactivation kinetics were followed by observing the temporal behavior of the bΣ-XΣ fluorescence. The removal rate constants for CO, N, and HO were not strongly dependent on temperature and could be represented by the expressions k = (1.18 ± 0.05) × 10 × T × exp[Formula: see text], k = (8 ± 0.3) × 10 × T × exp[Formula: see text], and k = (1.27 ± 0.08) × 10 × T × exp[Formula: see text] cm molecule s. Rate constants for O(bΣ) removal by O(X), being orders of magnitude lower, demonstrated a sharp increase with temperature, represented by the fitted expression k = (7.4 ± 0.8) × 10 × T × exp[Formula: see text] cm molecule s. All of the rate constants measured at room temperature were found to be in good agreement with previously reported values.
已测定了在297至800 K温度范围内，O(bΣ)与O、N、CO和HO碰撞去除的速率常数。O(bΣ)由可调谐染料激光脉冲激发，通过观察bΣ-XΣ荧光的时间行为跟踪失活动力学。CO、N和HO的去除速率常数对温度的依赖性不强，可用表达式k = (1.18 ± 0.05) × 10 × T × exp[公式：见原文]、k = (8 ± 0.3) × 10 × T × exp[公式：见原文]和k = (1.27 ± 0.08) × 10 × T × exp[公式：见原文] cm³分子⁻¹ s⁻¹表示。O(X)去除O(bΣ)的速率常数低几个数量级，随温度急剧增加，拟合表达式为k = (7.4 ± 0.8) × 10 × T × exp[公式：见原文] cm³分子⁻¹ s⁻¹。发现在室温下测量的所有速率常数与先前报道的值高度一致。
