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首页> 外文期刊>The Journal of Chemical Physics >New information on the ozone monomer photochemistry at 266 nm in nitrogen matrix
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New information on the ozone monomer photochemistry at 266 nm in nitrogen matrix

机译:氮基质中266 nm处臭氧单体光化学的新信息

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The photochemistry of ozone trapped in solid nitrogen and mixed matrices has been reinvestigated using irradiation at 266 nm and infrared spectroscopy between 10 and 25 K. In this temperature range the most probable reaction channel appears to be the formation of metastable excited nitrous oxide molecules that fragment mostly into an oxygen atom and nitrogen. Recombination of O+O-2 is negligible, suggesting that the atomic oxygen that is formed from the deactivation of excited N2O is bound to the nitrogen molecule, preventing the reformation of O-3 and leading to a fast first-order photodecomposition of ozone in highly diluted samples. The experimental value of the photokinetic constant suggests that the photodissociation cross section of ozone in matrices at 266 nm is weaker than that measured in the gas phase. (C) 1998 American Institute of Physics. [References: 26]
机译:已使用266 nm辐射和10至25 K之间的红外光谱对固态氮和混合基质中捕获的臭氧的光化学进行了重新研究。在此温度范围内,最可能的反应通道似乎是形成亚稳态激发的一氧化二氮分子,该分子会碎裂大部分变成氧原子和氮O + O-2的重组可忽略不计,这表明由激发的N2O失活形成的原子氧与氮分子结合,阻止了O-3的重整并导致臭氧中臭氧的快速一阶光分解。高度稀释的样品。光动力学常数的实验值表明,臭氧在266 nm基质中的光解离截面比在气相中测得的弱。 (C)1998美国物理研究所。 [参考:26]

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