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Terpenylic acid and nine-carbon multifunctional compounds formed during the aging of β-pinene ozonolysis secondary organic aerosol
https://orcid.org/0000-0002-3716-3730
Abstract Recent field and laboratory studies suggest that forest aerosol particles contain more highly functionalized organic molecules than pinonic acid, a traditional molecular maker of secondary organic aerosol (SOA) particles. To investigate the reaction mechanisms during the aging of biogenic SOAs, the gases and particles formed from the ozonolysis of β- and α-pinene were exposed to OH radicals in a laboratory chamber. The particle samples were collected before and after OH exposure for analysis by liquid chromatography-negative electrospray ionization time-of-flight mass spectrometry. Pinic acid and terpenylic acid were abundant products in both β- and α-pinene ozonolysis SOA particles. Terpenylic acid and products with m/z 201.08 present in β-pinene SOA particles increased upon exposing SOA to OH radicals, whereas 3-methyl-1,2,3-butanetricarboxylic acid present in α-pinene SOA particles increased upon exposing SOA to OH radicals. The products with m/z 201.08 were suggested to be C9H14O5 compounds. Similar C9H14O5 compounds and terpenylic acid were also detected in SOA particles formed from the photooxidation of nopinone, a major first-generation product of β-pinene ozonolysis. The OH-initiated oxidation of nopinone will contribute to the formation of terpenylic acid and C9H14O5 compounds during the aging of β-pinene SOA. A formation mechanism for terpenylic acid via gas-phase diaterpenylic acid formation followed by self-dehydration in the condensed phase was suggested.
Graphical abstract Display Omitted
Highlights SOA formed from β-pinene ozonolysis was exposed to OH radicals. Terpenylic acid and C9H14O5 in SOA particles increased after OH exposure. Nopinone oxidation will contribute to terpenylic acid and C9H14O5 formation. Formation mechanisms of terpenylic acid and C9H14O5 were suggested.
Terpenylic acid and nine-carbon multifunctional compounds formed during the aging of β-pinene ozonolysis secondary organic aerosol
https://orcid.org/0000-0002-3716-3730
Abstract Recent field and laboratory studies suggest that forest aerosol particles contain more highly functionalized organic molecules than pinonic acid, a traditional molecular maker of secondary organic aerosol (SOA) particles. To investigate the reaction mechanisms during the aging of biogenic SOAs, the gases and particles formed from the ozonolysis of β- and α-pinene were exposed to OH radicals in a laboratory chamber. The particle samples were collected before and after OH exposure for analysis by liquid chromatography-negative electrospray ionization time-of-flight mass spectrometry. Pinic acid and terpenylic acid were abundant products in both β- and α-pinene ozonolysis SOA particles. Terpenylic acid and products with m/z 201.08 present in β-pinene SOA particles increased upon exposing SOA to OH radicals, whereas 3-methyl-1,2,3-butanetricarboxylic acid present in α-pinene SOA particles increased upon exposing SOA to OH radicals. The products with m/z 201.08 were suggested to be C9H14O5 compounds. Similar C9H14O5 compounds and terpenylic acid were also detected in SOA particles formed from the photooxidation of nopinone, a major first-generation product of β-pinene ozonolysis. The OH-initiated oxidation of nopinone will contribute to the formation of terpenylic acid and C9H14O5 compounds during the aging of β-pinene SOA. A formation mechanism for terpenylic acid via gas-phase diaterpenylic acid formation followed by self-dehydration in the condensed phase was suggested.
Graphical abstract Display Omitted
Highlights SOA formed from β-pinene ozonolysis was exposed to OH radicals. Terpenylic acid and C9H14O5 in SOA particles increased after OH exposure. Nopinone oxidation will contribute to terpenylic acid and C9H14O5 formation. Formation mechanisms of terpenylic acid and C9H14O5 were suggested.
Terpenylic acid and nine-carbon multifunctional compounds formed during the aging of β-pinene ozonolysis secondary organic aerosol
https://orcid.org/0000-0002-3716-3730
Abstract Recent field and laboratory studies suggest that forest aerosol particles contain more highly functionalized organic molecules than pinonic acid, a traditional molecular maker of secondary organic aerosol (SOA) particles. To investigate the reaction mechanisms during the aging of biogenic SOAs, the gases and particles formed from the ozonolysis of β- and α-pinene were exposed to OH radicals in a laboratory chamber. The particle samples were collected before and after OH exposure for analysis by liquid chromatography-negative electrospray ionization time-of-flight mass spectrometry. Pinic acid and terpenylic acid were abundant products in both β- and α-pinene ozonolysis SOA particles. Terpenylic acid and products with m/z 201.08 present in β-pinene SOA particles increased upon exposing SOA to OH radicals, whereas 3-methyl-1,2,3-butanetricarboxylic acid present in α-pinene SOA particles increased upon exposing SOA to OH radicals. The products with m/z 201.08 were suggested to be C9H14O5 compounds. Similar C9H14O5 compounds and terpenylic acid were also detected in SOA particles formed from the photooxidation of nopinone, a major first-generation product of β-pinene ozonolysis. The OH-initiated oxidation of nopinone will contribute to the formation of terpenylic acid and C9H14O5 compounds during the aging of β-pinene SOA. A formation mechanism for terpenylic acid via gas-phase diaterpenylic acid formation followed by self-dehydration in the condensed phase was suggested.
Graphical abstract Display Omitted
Highlights SOA formed from β-pinene ozonolysis was exposed to OH radicals. Terpenylic acid and C9H14O5 in SOA particles increased after OH exposure. Nopinone oxidation will contribute to terpenylic acid and C9H14O5 formation. Formation mechanisms of terpenylic acid and C9H14O5 were suggested.
Terpenylic acid and nine-carbon multifunctional compounds formed during the aging of β-pinene ozonolysis secondary organic aerosol
Sato, Kei (author) / Jia, Tianyu (author) / Tanabe, Kiyoshi (author) / Morino, Yu (author) / Kajii, Yoshizumi (author) / Imamura, Takashi (author)
Atmospheric Environment ; 130 ; 127-135
2015-08-18
9 pages
Article (Journal)
Electronic Resource
English
Biogenic volatile organic compound , Secondary organic aerosol , Environmental chamber , Molecular marker , Multiphase chemistry , EIC , Extracted-ion chromatogram , FT-IR , Fourier transform-infrared spectroscopy , LC–TOF , Liquid chromatography–time-of-flight mass spectrometry , MBTCA , 3-methyl-1,2,3-butanetricarboxylic acid , SMPS , Scanning mobility particle sizer , SOA
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