Citronellal reactions with ozone and OH radical: Rate constants and gas-phase products detected using PFBHA derivatization

The bimolecular rate constants, k OH+citronellal, (150±40)×10 −12 cm 3 molecule −1 s −1 and, k O 3 + citronellal , (3.5±1.2)×10 −16 cm 3 molecule −1 s −1, were measured using the relative rate technique for the reactions of the hydroxyl radical (OH) and ozone (O 3) with 3,7-dimethyl-6-octen-1-al ((R...

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Vydáno v:Atmospheric environment (1994) Ročník 41; číslo 21; s. 4482 - 4491
Hlavní autoři: Harrison, J.C., Ham, J.E., Wells, J.R.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford Elsevier Ltd 01.07.2007
Elsevier Science
Témata:
3, 7-Dimethyl-6-octen-1-al
Applied sciences
Atmospheric pollution
Buildings. Public works
Citronellal
Exact sciences and technology
Indoor pollution and occupational exposure
Kinetics
Oxygenated organic compounds
Pollution
Pollution indoor buildings
Reaction products
Citronellal
Reaction products
Oxygenated organic compounds
Kinetics
3, 7-Dimethyl-6-octen-1-al
Ozonolysis
Terpenoid
Pollutant behavior
Reaction product
Ozone
Volatile organic compound
Citronellal; 3
Aldehyde
Enaldehyde
Chemical reaction kinetics
Ethylenic aliphatic compound
Reaction mechanism
Indoor pollution
7-Dimethyl-6-octen-l-al; Reaction products; Kinetics; Oxygenated organic compounds
Oxidation
Gaseous phase reaction
Hydroxyl
ISSN:1352-2310, 1873-2844
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Shrnutí:The bimolecular rate constants, k OH+citronellal, (150±40)×10 −12 cm 3 molecule −1 s −1 and, k O 3 + citronellal , (3.5±1.2)×10 −16 cm 3 molecule −1 s −1, were measured using the relative rate technique for the reactions of the hydroxyl radical (OH) and ozone (O 3) with 3,7-dimethyl-6-octen-1-al ((R)-(+)-citronellal) at (297±3) K and 1 atm total pressure. To more clearly define part of citronellal's indoor environment degradation mechanism, the products of the citronellal+OH and citronellal+O 3 reactions were also investigated. The positively identified citronellal/OH and citronellal/O 3 reaction products were: 3-methylhexanedial HC( O)CH 2CH 2CH(CH 3)CH 2C( O)H and 2-oxopropanal (methylglyoxal, CH 3C( O)C( O)H). The use of derivatizing agent O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBHA) was used to propose 3-methylhexanedial as a major citronellal/OH and citronellal/O 3 reaction product. The elucidation of this reaction product was facilitated by mass spectrometry of the derivatized reaction products coupled with plausible citronellal/OH and citronellal/O 3 reaction mechanisms based on previously published volatile organic compound/OH and volatile organic compound/O 3 gas-phase reaction mechanisms.
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ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2007.01.042