期刊
CHEMICAL SCIENCE
卷 11, 期 25, 页码 6423-6430出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0sc00063a
关键词
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资金
- Ministry of Science and Technology of Taiwan [MOST-105-2113-M-001-019-My3]
- Academia Sinica
- NSFC [21590801, 21688102, 21421003]
The roaming mechanism, an unconventional reaction path, was discovered more than a decade ago in the studies of formaldehyde photodissociation, H2CO -> H-2+ CO. Since then, observations of roaming have been claimed in numerous photochemical processes. A closer examination of the presented data, however, revealed that evidence for roaming is not always unequivocal, and some of the conclusions could be misleading. We report here an in-depth, joint experimental and theoretical study of the title reaction. By tracking the time-evolution of the pair-correlated product state distributions, we decipher the competing, interwoven reaction pathways that lead to the radical (CH3+ HCO) and molecular (CH4+ CO) products. Possible roaming pathways are then elucidated and a more precise descriptor of the phenomenon is delineated.
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