Journal
CHEMICAL PHYSICS LETTERS
Volume 598, Issue -, Pages 23-27Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2014.02.049
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Funding
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1112016] Funding Source: National Science Foundation
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The OH radical products from unimolecular decay of energized CH2OO and CH3CHOO Criegee intermediates are detected by laser-induced fluorescence shortly after they are formed utilizing 248 nm photolysis of diiodo precursors and subsequent reaction with O-2. The OH radicals from both CH2OO and CH3CHOO are produced with average rotational energies of similar to 1-2 kcal mol (1). A different mechanism for unimolecular decay of CH3CHOO is evident from noticeably broader OH A-X (1,0) line profiles, which is attributed to Doppler broadening. Modeling of the Doppler profiles suggests that most of the available energy is channeled into translational excitation of the products. (C) 2014 Elsevier B.V. All rights reserved.
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