Highly oxidized products from the atmospheric reaction of hydroxyl radicals with isoprene.

ABSTRACT: Isoprene (C₅H₈) globally accounts for half of the non-methane hydrocarbon flux into Earth´s atmosphere. Its degradation is mainly initiated by the gas-phase reaction with OH radicals yielding a complex system of RO₂ radicals. Subsequent product formation is not conclusively understood yet. Here we report the observation of C₄- and C₅-products from OH + isoprene bearing at least two functional groups. Their production is initiated either by the reaction of initially formed δ-RO₂ radicals with NO or by 1,6 H-shift isomerization of Z-δ-RO₂ radicals. Both reaction channels also form highly oxygenated molecules (HOMs), which could be important for the generation of secondary organic aerosol. C₅H₉O

SUBMITTER: Berndt T 

PROVIDER: S-EPMC11871199 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature