Primary quantum yields of NO2 photodissociation
Primary quantum yields of NO2 photodissociation
复制标题
NO2 光解的初级量子产率
DOI：
10.1029/jd092id06p06642
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发表时间：
1987
影响因子：
--
通讯作者：
J. Calvert
中科院分区：
文献类型：
--
作者：
E. Gardner;P. Sperry;J. Calvert
最近对二氧化氮光解的初级量子效率(ϕ1)，即NO2+hν→NO+O(3P)，在374~396 nm波长范围内的估计存在很大的差异。为了解决这个问题，在选定的波长(334.1-404.3 nm)和温度(273-370K)下，测量了低压(0.13-0.30Torr)下NO2蒸气中NO、O2的生成量子产率和NO2的损失。根据这些数据，得到了ϕ1的估计值，这证实了琼斯和贝叶斯(1973b)之前的发现：ϕ1从424 nm的近零迅速增加到近1，因为λ397.9 nm的激发(λDISS)很大程度上是由NO_2分子的转动和振动能组成的。基于对这些数据的回顾和对58年期间的估计，给出了作为波长的函数的ϕ1的推荐值。
A large discrepancy exists among recent estimates of the primary quantum efficiencies (ϕ1) of nitrogen dioxide photodecomposition, NO2 + hν → NO + O(3P), in the wavelength range from 374 to 396 nm. To resolve this problem, quantum yields of formation of NO, O2, and NO2 loss have been measured for NO2 vapor at low pressures (0.13–0.30 torr) irradiated at selected wavelengths (334.1–404.3 nm) and temperatures (273–370 K). From these data, estimates of ϕ1 were derived which confirm the previous findings of Jones and Bayes (1973b): ϕ1 increases rapidly from near zero at 424 nm to near unity for excitation at λ 397.9 nm (λdiss) is made up in large part from the rotational and vibrational energy of the NO2 molecules. Recommended values for ϕ1 based upon a review of these data and estimates made over a period of 58 years, are given as a function of wavelength.