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Isomer-Resolved Mobility-Mass Analysis of α-Pinene Ozonolysis Products
[Image: see text] Highly oxygenated organic molecules (HOMs) are important sources of atmospheric aerosols. Resolving the molecular-level formation mechanisms of these HOMs from freshly emitted hydrocarbons improves the understanding of aerosol properties and their influence on the climate. In this...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9358649/ https://www.ncbi.nlm.nih.gov/pubmed/35862553 http://dx.doi.org/10.1021/acs.jpca.2c03366 |
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author | Skyttä, Aurora Gao, Jian Cai, Runlong Ehn, Mikael Ahonen, Lauri R. Kurten, Theo Wang, Zhibin Rissanen, Matti P. Kangasluoma, Juha |
author_facet | Skyttä, Aurora Gao, Jian Cai, Runlong Ehn, Mikael Ahonen, Lauri R. Kurten, Theo Wang, Zhibin Rissanen, Matti P. Kangasluoma, Juha |
author_sort | Skyttä, Aurora |
collection | PubMed |
description | [Image: see text] Highly oxygenated organic molecules (HOMs) are important sources of atmospheric aerosols. Resolving the molecular-level formation mechanisms of these HOMs from freshly emitted hydrocarbons improves the understanding of aerosol properties and their influence on the climate. In this study, we measure the electrical mobility and mass-to-charge ratio of α-pinene oxidation products using a secondary electrospray-differential mobility analyzer-mass spectrometer (SESI-DMA-MS). The mass-mobility spectrum of the oxidation products is measured with seven different reagent ions generated by the electrospray. We analyzed the mobility-mass spectra of the oxidation products C(9–10)H(14–18)O(2–6). Our results show that acetate and chloride yield the highest charging efficiencies. Analysis of the mobility spectra suggests that the clusters have 1–5 isomeric structures (i.e., ion-molecule cluster structures with distinct mobilities), and the number is affected by the reagent ion. Most of the isomers are likely cluster isomers originating from binding of the reagent ion to different sites of the molecule. By comparing the number of observed isomers and measured mobilities and collision cross sections between standard pinanediol and pinonic acid to the values observed for C(10)H(18)O(2) and C(10)H(16)O(3) produced from oxidation of α-pinene, we confirm that pinanediol and pinonic acid are the only isomers for these elemental compositions in our experimental conditions. Our study shows that the SESI-DMA-MS produces new information from the first steps of oxidation of α-pinene. |
format | Online Article Text |
id | pubmed-9358649 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-93586492022-08-10 Isomer-Resolved Mobility-Mass Analysis of α-Pinene Ozonolysis Products Skyttä, Aurora Gao, Jian Cai, Runlong Ehn, Mikael Ahonen, Lauri R. Kurten, Theo Wang, Zhibin Rissanen, Matti P. Kangasluoma, Juha J Phys Chem A [Image: see text] Highly oxygenated organic molecules (HOMs) are important sources of atmospheric aerosols. Resolving the molecular-level formation mechanisms of these HOMs from freshly emitted hydrocarbons improves the understanding of aerosol properties and their influence on the climate. In this study, we measure the electrical mobility and mass-to-charge ratio of α-pinene oxidation products using a secondary electrospray-differential mobility analyzer-mass spectrometer (SESI-DMA-MS). The mass-mobility spectrum of the oxidation products is measured with seven different reagent ions generated by the electrospray. We analyzed the mobility-mass spectra of the oxidation products C(9–10)H(14–18)O(2–6). Our results show that acetate and chloride yield the highest charging efficiencies. Analysis of the mobility spectra suggests that the clusters have 1–5 isomeric structures (i.e., ion-molecule cluster structures with distinct mobilities), and the number is affected by the reagent ion. Most of the isomers are likely cluster isomers originating from binding of the reagent ion to different sites of the molecule. By comparing the number of observed isomers and measured mobilities and collision cross sections between standard pinanediol and pinonic acid to the values observed for C(10)H(18)O(2) and C(10)H(16)O(3) produced from oxidation of α-pinene, we confirm that pinanediol and pinonic acid are the only isomers for these elemental compositions in our experimental conditions. Our study shows that the SESI-DMA-MS produces new information from the first steps of oxidation of α-pinene. American Chemical Society 2022-07-21 2022-08-04 /pmc/articles/PMC9358649/ /pubmed/35862553 http://dx.doi.org/10.1021/acs.jpca.2c03366 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Skyttä, Aurora Gao, Jian Cai, Runlong Ehn, Mikael Ahonen, Lauri R. Kurten, Theo Wang, Zhibin Rissanen, Matti P. Kangasluoma, Juha Isomer-Resolved Mobility-Mass Analysis of α-Pinene Ozonolysis Products |
title | Isomer-Resolved
Mobility-Mass Analysis of α-Pinene
Ozonolysis Products |
title_full | Isomer-Resolved
Mobility-Mass Analysis of α-Pinene
Ozonolysis Products |
title_fullStr | Isomer-Resolved
Mobility-Mass Analysis of α-Pinene
Ozonolysis Products |
title_full_unstemmed | Isomer-Resolved
Mobility-Mass Analysis of α-Pinene
Ozonolysis Products |
title_short | Isomer-Resolved
Mobility-Mass Analysis of α-Pinene
Ozonolysis Products |
title_sort | isomer-resolved
mobility-mass analysis of α-pinene
ozonolysis products |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9358649/ https://www.ncbi.nlm.nih.gov/pubmed/35862553 http://dx.doi.org/10.1021/acs.jpca.2c03366 |
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