Highly Oxidized RO2 Radicals and Consecutive Products from the Ozonolysis of Three Sesquiterpenes.

摘要: The formation of highly oxidized multifunctional organic compounds (HOMs) from the ozonolysis three sesquiterpenes, α-cedrene, β-caryophyllene, and α-humulene, was investigated for first time. Sesquiterpenes contribute 2.4% to global carbon emission biogenic volatile (BVOCs) can be responsible up 70% regional BVOC emissions. HOMs were detected with chemical ionization−atmospheric pressure interface−time-of-flight mass spectrometry nitrate acetate ionization. Acetate ions more sensitive toward RO2 radicals containing a single hydroperoxide moiety. Under chosen reaction conditions, product dominated by which react NO, NO2, HO2, other under atmospheric conditions. sesquiterpenes resulted in molar HOM yields 0.6% α-cedrene (acetate), 1.8% β-caryophyllene 1.4% α-humulene (nitrate) afflicted an uncertainty factor ...