Articles | Volume 18, issue 1
Atmos. Chem. Phys., 18, 65–79, 2018
https://doi.org/10.5194/acp-18-65-2018
Atmos. Chem. Phys., 18, 65–79, 2018
https://doi.org/10.5194/acp-18-65-2018

Research article 04 Jan 2018

Research article | 04 Jan 2018

Influence of temperature on the molecular composition of ions and charged clusters during pure biogenic nucleation

Carla Frege et al.

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Latest update: 17 Sep 2021
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Short summary
It was recently shown that biogenic highly oxygenated molecules (HOMs) form particles in the absence of sulfuric acid and ions enhance the nucleation rate. Here we compare the molecular composition of positive and negative HOM clusters at 25, 5 and −25 °C. At lower temperatures the HOM average oxygen-to-carbon ratio decreases indicating a reduction in the rate of autoxidation due to rather high activation energy. The experimental findings are supported by quantum chemical calculations.
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