Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 24, issue 7
Articles | Volume 24, issue 7
https://doi.org/10.5194/acp-24-4473-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-4473-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 24, issue 7
Research article
 | 
17 Apr 2024
Research article |  | 17 Apr 2024

Formation and loss of light absorbance by phenolic aqueous SOA by ●OH and an organic triplet excited state

Stephanie Arciva, Lan Ma, Camille Mavis, Chrystal Guzman, and Cort Anastasio

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Latest update: 23 Apr 2025
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Short summary
We measured changes in light absorption during the aqueous oxidation of six phenols with hydroxyl radical (●OH) or an organic triplet excited state (3C*). All the phenols formed light-absorbing secondary brown carbon (BrC), which then decayed with continued oxidation. Extrapolation to ambient conditions suggest ●OH is the dominant sink of secondary phenolic BrC in fog/cloud drops, while 3C* controls the lifetime of this light absorption in particle water.
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