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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Energy Transfer from NH(a~1Δ,v) to O_2(X~3∑_g~-): Kinetics of Single Vibrational States
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Energy Transfer from NH(a~1Δ,v) to O_2(X~3∑_g~-): Kinetics of Single Vibrational States

机译：从NH（a〜1Δ，v）到O_2（X〜3∑_g〜-）的能量转移：单振动态的动力学

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This experimental investigation reports the temperature-dependent reaction rate constants for electronically excited, metastable NH(a) and ND(a) radicals in the v = 0-3 levels that are transferring electronic energy to O2 to yield O_2(b). The covered temperature range is 209-421 K. All measured Arrhenius activation energies (E_a) are essentially independent of v and fall into the range of 6.7-9.0 kJ/mol, with an average value of 7.6 kJ/mol, except for NH(a,v = 3), which has an E_a value of 3.5 ±1.6 kJ/mol. Obviously, for the lowest levels, vibrational excitation does not markedly accelerate the energy transfer and does not seem to be favorable to overcome the small activation barrier. From this and previous work, we propose that a vibrationally adiabatic process generates NH(X,v). In the case of NH(a,v = 3), we suggest that an additional channel opens.
机译：这项实验研究报告了电子激发的亚稳态NH（a）和ND（a）自由基在v = 0-3的水平下随温度变化的反应速率常数，这些自由基将电子能量转移至O2以产生O_2（b）。涵盖的温度范围为209-421K。所有测得的Arrhenius活化能（E_a）基本上与v无关，落在6.7-9.0 kJ / mol的范围内，平均值为7.6 kJ / mol，除了NH（ a，v = 3），其E_a值为3.5±1.6 kJ / mol。显然，对于最低水平，振动激励不会显着加速能量传递，并且似乎不利于克服较小的激活势垒。从这项工作和以前的工作中，我们提出振动绝热过程会产生NH（X，v）。对于NH（a，v = 3），我们建议打开一个附加通道。

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