Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Citronellal reactions with ozone and OH radical: Rate constants and gas-phase products detected using PFBHA derivatization
AbstractThe bimolecular rate constants, kOH+citronellal, (150±40)×10−12cm3molecule−1s−1 and, , (3.5±1.2)×10−16cm3molecule−1s−1, were measured using the relative rate technique for the reactions of the hydroxyl radical (OH) and ozone (O3) with 3,7-dimethyl-6-octen-1-al ((R)-(+)-citronellal) at (297±3)K and 1atm total pressure. To more clearly define part of citronellal's indoor environment degradation mechanism, the products of the citronellal+OH and citronellal+O3 reactions were also investigated. The positively identified citronellal/OH and citronellal/O3 reaction products were: 3-methylhexanedial HC(O)CH2CH2CH(CH3)CH2C(O)H and 2-oxopropanal (methylglyoxal, CH3C(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/O3 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/O3 reaction mechanisms based on previously published volatile organic compound/OH and volatile organic compound/O3 gas-phase reaction mechanisms.
Citronellal reactions with ozone and OH radical: Rate constants and gas-phase products detected using PFBHA derivatization
AbstractThe bimolecular rate constants, kOH+citronellal, (150±40)×10−12cm3molecule−1s−1 and, , (3.5±1.2)×10−16cm3molecule−1s−1, were measured using the relative rate technique for the reactions of the hydroxyl radical (OH) and ozone (O3) with 3,7-dimethyl-6-octen-1-al ((R)-(+)-citronellal) at (297±3)K and 1atm total pressure. To more clearly define part of citronellal's indoor environment degradation mechanism, the products of the citronellal+OH and citronellal+O3 reactions were also investigated. The positively identified citronellal/OH and citronellal/O3 reaction products were: 3-methylhexanedial HC(O)CH2CH2CH(CH3)CH2C(O)H and 2-oxopropanal (methylglyoxal, CH3C(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/O3 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/O3 reaction mechanisms based on previously published volatile organic compound/OH and volatile organic compound/O3 gas-phase reaction mechanisms.
Citronellal reactions with ozone and OH radical: Rate constants and gas-phase products detected using PFBHA derivatization
Harrison, J.C. (Autor:in) / Ham, J.E. (Autor:in) / Wells, J.R. (Autor:in)
Atmospheric Environment ; 41 ; 4482-4491
17.01.2007
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch