A Flash Photolysis Investigation of the Gas Phase UV Absorption Spectrum and Self‐Reaction Kinetics of the Neopentylperoxy Radical
A Flash Photolysis Investigation of the Gas Phase UV Absorption Spectrum and Self‐Reaction Kinetics of the Neopentylperoxy Radical
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新戊基过氧自由基的气相紫外吸收光谱和自反应动力学的闪光光解研究
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
M. Kurylo
中科院分区：
文献类型：
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作者：
P. Dagaut;M. Kurylo
使用闪速光解技术在气相中研究了新戊基过氧自由基（CH 3 ） 3 CCH 2 O 2 （或C 5 H 11 O 2 ）的紫外吸收光谱及其自反应动力学。将250nm处的室温吸收截面确定为σC 5 H 11 O 2 (250nm)＝(5.18±0.78)×10 -18 cm 2 分子-1，并用于标准化210和300nm之间的自由基吸收光谱。自反应系统的详细建模用于解释 228-380 K 温度范围、25 至 100 托总压力下的瞬态吸收动力学衰减曲线。结合先前的烷基过氧自由基光谱和动力学测量结果讨论了结果
The ultraviolet absorption spectrum of the neopentylperoxy radical, (CH 3 ) 3 CCH 2 O 2 (or C 5 H 11 O 2 ), and the kinetics of its self-reaction have been studied in the gas phase using a flash photolysis technique. The room temperature absorption cross-section at 250 nm was determined to be σC 5 H 11 O 2 (250 nm)=(5.18±0.78)×10 −18 cm 2 molecule −1 and was used to normalize the radical absorption spectrum between 210 and 300 nm. Detailed modeling of the self-reaction system was used to interpret the transient absorption kinetic decay curves over the temperature range 228-380 K, at total pressures between 25 and 100 torr. The results are discussed in relation to previous measurements of alkylperoxy radical spectra and kinetics