Strange and unconventional isotope effects in ozone formation

被引:275
作者
Gao, YQ [1 ]
Marcus, RA [1 ]
机构
[1] CALTECH, Arthur Amos Noyes Lab Chem Phys, Pasadena, CA 91125 USA
关键词
D O I
10.1126/science.1058528
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The puzzling mass-independent isotopic enrichment in ozone formation contrasts markedly with the more recently observed large unconventional mass-dependent ratios of the individual ozone formation rate constants in certain systems. An RRKM (Rice, Ramsperger, Kassel, Marcus)-based theory is used to treat both effects. Restrictions of symmetry on how energy is shared among the rotational/vibrational states of the ozone isotopomer, together with an analysis of the competition between the transition states of its two exit channels, permit the calculation of isotope effects consistent with a wide array of experimental results.
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收藏
页码:259 / 263
页数:5
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