Hydrotrioxide (ROOOH) formation in the atmosphere
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Organic hydrotrioxides (ROOOH) are known to be strong oxidants used in organic synthesis. Previously, it has been speculated that they are formed in the atmosphere through the gas-phase reaction of organic peroxy radicals (RO2) with hydroxyl radicals (OH). Here, we report direct observation of ROOOH formation from several atmospherically relevant RO2 radicals. Kinetic analysis confirmed rapid RO2 + OH reactions forming ROOOH, with rate coefficients close to the collision limit. For the OH-initiated degradation of isoprene, global modeling predicts molar hydrotrioxide formation yields of up to 1%, which represents an annual ROOOH formation of about 10 million metric tons. The atmospheric lifetime of ROOOH is estimated to be minutes to hours. Hydrotrioxides represent a previously omitted substance class in the atmosphere, the impact of which needs to be examined.
Originalsprog | Engelsk |
---|---|
Tidsskrift | Science |
Vol/bind | 376 |
Udgave nummer | 6596 |
Sider (fra-til) | 979-982 |
Antal sider | 4 |
ISSN | 0036-8075 |
DOI | |
Status | Udgivet - 27 maj 2022 |
ID: 312484409