I(2P1/2) 被 O3 和 O(3P) 猝灭
Quenching of I(2P1/2) by O3 and O(3P).
作者信息
Azyazov Valeriy N, Antonov Ivan O, Heaven Michael C
机构信息
Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
出版信息
J Phys Chem A. 2007 Apr 26;111(16):3010-5. doi: 10.1021/jp068546g. Epub 2007 Apr 4.
Oxygen-iodine lasers that utilize electrical or microwave discharges to produce singlet oxygen are currently being developed. The discharge generators differ from conventional chemical singlet oxygen generators in that they produce significant amounts of atomic oxygen. Post-discharge chemistry includes channels that lead to the formation of ozone. Consequently, removal of I(2P1/2) by O atoms and O3 may impact the efficiency of discharge driven iodine lasers. In the present study, we have measured the rate constants for quenching of I(2P1/2) by O(3P) atoms and O3 using pulsed laser photolysis techniques. The rate constant for quenching by O3, (1.8 +/- 0.4) x 10(-12) cm3 s-1, was found to be a factor of 5 smaller than the literature value. The rate constant for quenching by O(3P) was (1.2 +/- 0.2) x 10(-11) cm3 s-1.
目前正在研发利用电放电或微波放电来产生单重态氧的氧碘激光器。放电发生器与传统化学单重态氧发生器的不同之处在于，它们会产生大量的原子氧。放电后的化学反应包括导致臭氧形成的通道。因此，O原子和O3对I(2P1/2)的去除可能会影响放电驱动碘激光器的效率。在本研究中，我们使用脉冲激光光解技术测量了O(3P)原子和O3猝灭I(2P1/2)的速率常数。发现O3猝灭的速率常数为(1.8±0.4)×10(-12) cm3 s-1，比文献值小5倍。O(3P)猝灭的速率常数为(1.2±0.2)×10(-11) cm3 s-1。
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