TY - JOUR
T1 - Atmospheric Oxidation of Biogenic Hydrocarbons
T2 - Reaction of Ozone with β-Pinene, d-Limonene and trans-Caryophyllene
AU - Grosjean, Daniel
AU - Williams, Edwin L.
AU - Grosjean, Eric
AU - Andino, Jean M.
AU - Seinfeld, John H.
PY - 1993/1/1
Y1 - 1993/1/1
N2 - Several gas-phase carbonyl products of two terpenes, β-pinene and D-limonene, and of the sesquiterpene, trans-caryophyllene, have been identified and their concentrations measured in experiments involving the reaction of these unsaturated biogenic hydrocarbons with ozone in the dark. Cyclohexane was added as a scavenger for the hydroxyl radical to minimize interferences from OH, which forms as a product of the ozone-hydrocarbon reaction. Carbonyl products were formaldehyde (yield = 0.42) and nopinone (yield = 0.22) from β-pinene, formaldehyde (yield = 0.10) and 4-acetyl-1-methylcyclohexene from D-limonene, and formaldehyde (yield 0.08) from trans-caryophyllene. The nature and yields of these products are discussed in terms of the ozone-olefin reaction mechanism. The ozone-β-pinene reaction rate constant, measured in the presence of cyclohexane, is 12.2 ± 1.3 × 10−18 cm3 molecule−1 s−1 at 22 ± 1 °C. Carbonyl products have also been identified in exploratory experiments with trans-caryophyllene and NO in sunlight.
AB - Several gas-phase carbonyl products of two terpenes, β-pinene and D-limonene, and of the sesquiterpene, trans-caryophyllene, have been identified and their concentrations measured in experiments involving the reaction of these unsaturated biogenic hydrocarbons with ozone in the dark. Cyclohexane was added as a scavenger for the hydroxyl radical to minimize interferences from OH, which forms as a product of the ozone-hydrocarbon reaction. Carbonyl products were formaldehyde (yield = 0.42) and nopinone (yield = 0.22) from β-pinene, formaldehyde (yield = 0.10) and 4-acetyl-1-methylcyclohexene from D-limonene, and formaldehyde (yield 0.08) from trans-caryophyllene. The nature and yields of these products are discussed in terms of the ozone-olefin reaction mechanism. The ozone-β-pinene reaction rate constant, measured in the presence of cyclohexane, is 12.2 ± 1.3 × 10−18 cm3 molecule−1 s−1 at 22 ± 1 °C. Carbonyl products have also been identified in exploratory experiments with trans-caryophyllene and NO in sunlight.
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U2 - 10.1021/es00049a014
DO - 10.1021/es00049a014
M3 - Article
AN - SCOPUS:0027788143
SN - 0013-936X
VL - 27
SP - 2754
EP - 2758
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 13
ER -