Kinetics of Electron Scavenging and Ion Recombination in the Radiolysis of Hydrocarbon Solutions
Kinetics of Electron Scavenging and Ion Recombination in the Radiolysis of Hydrocarbon Solutions
复制标题
烃溶液辐射解中电子清除和离子复合的动力学
DOI：
10.1063/1.1673597
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发表时间：
1970
期刊：
影响因子：
--
通讯作者：
R. H. Schuler
中科院分区：
文献类型：
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作者：
S. Rzad;P. Infelta;J. Warman;R. H. Schuler
纯烃的辐解中产生的离子对的寿命的功能描述来自离子清除观察到的浓度依赖性。一些后果，从这个描述进行了探讨。特别地，它表明，在没有清除剂的情况下，成对离子的衰变必须非常接近地描述为F（t）= eλterfc（λt）1/2，其中λ是常数，F（t）是在时间t存在的离子的分数。给出了二次离子生长和衰变的适当描述，并将结果应用于有限脉冲的真实的系统。本文对二次负离子布居的时间依赖性的预测与托马斯及其同事在脉冲辐照联苯的环己烷溶液中联苯负离子衰变的实验观测作了比较。结果表明，联苯清除电子的速率常数为1.3 × 10 ~（11）M −1·sec−1，
A functional description of the lifetimes of the ion pairs produced in the radiolysis of pure hydrocarbons is derived from the concentration dependence observed for ion scavenging. A number of consequences which follow from this description are explored. In particular it is shown that in the absence of scavenger the decay of the geminate ions must be very closely described by F(t) = eλterfc(λt)1/2, where λ is a constant and F(t) is the fraction of ions present at time t. Appropriate descriptions for the growth and decay of secondary ions are given, and the results are applied to real systems of finite pulses. Comparison is made between the predictions given here for the time dependence of the population of secondary negative ions and the experimental observations of Thomas and co‐workers on the decay of diphenylide negative ion in pulse irradiated cyclohexane solutions of diphenyl. From this comparison it is concluded that the rate constant for electron scavenging by the diphenyl is ∼ 3 × 1011M−1·sec−1 an...