Atmospheric Chemistry of 1,3,5-Trioxane: UV Spectra of c-C3H5O3(•) and (c-C3H5O3)O2(•) Radicals, Kinetics of the Reactions of (c-C3H5O3)O2(•) Radicals with NO and NO2, and Atmospheric Fate of the Alkoxy Radical (c-C3H5O3)O(•)
| Autor: | Timothy J. Wallington, Rainer Vogt, J. Platz, Jens Sehested, Ole John Nielsen, L. K. Christensen, C. G. Sauer, K. H. Becker, Ian Barnes |
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| Rok vydání: | 1998 |
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| Zdroj: | The Journal of Physical Chemistry A. 102:4829-4838 |
| ISSN: | 1520-5215 1089-5639 |
| DOI: | 10.1021/jp9809540 |
| Popis: | A pulse radiolysis technique was used to measure the UV absorption spectra of c-C3H5O3(•) and (c-C3H5O3)O2(•) radicals over the range 220−300 nm, with σ(c-C3H5O3(•))250 nm = (5.2 ± 0.7) × 10-18 and σ((c-C3H5O3)O2(•))250 nm = (3.7 ± 0.4) × 10-18 cm2 molecule-1. The self-reaction rate constant for the c-C3H5O3(•) radicals, defined as d[c-C3H5O3(•)]/dt = 2k4[c-C3H5O3(•)]2, was k4 = (3.1 ± 0.6) × 10-11 cm3 molecule-1 s-1. The rate constants for reactions of (c-C3H5O3)O2(•) radicals with NO and NO2 were k6 = (5.8 ± 1.4) × 10-12 and k7 = (1.1 ± 0.2) × 10-11 cm3 molecule-1 s-1, respectively. The rate constants for the reaction of F atoms with 1,3,5-trioxane and the reaction of c-C3H5O3(•) radicals with O2 were k3 = (1.1 ± 0.4) × 10-10 and k2 = (7.4 ± 1.1) × 10-12 cm3 molecule-1 s-1, respectively. Relative rate techniques were used to measure the rate constants for the reactions of OH radicals and Cl atoms with 1,3,5-trioxane and Cl atoms with H(O)COCH2OC(O)H, k20 = (6.0 ± 1.0) × 10-12, k24 = (1.0 ± 0.2) × 10-10,... |
| Databáze: | OpenAIRE |
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