Comment on "unexpected epoxide formation in the gas-phase photooxidation of isoprene"

Abstract

Paulot et al. (Reports, 7 August 2009, p. 730) reported that the photooxidation of isoprene under low-nitrogen oxides (NOx) conditions produces epoxides that can facilitate the formation of secondary organic aerosol (SOA However, another pathway involving the formation of methyl-butenediol intermediates can also lead to isoprene-derived SOA formation. Further research is needed to clarify the fate of isoprene in the atmosphere.