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Anglada JM, Martins-Costa MTC, Francisco JS, Ruiz-López MF. Triplet State Radical Chemistry: Significance of the Reaction of 3SO 2 with HCOOH and HNO 3. J Am Chem Soc 2024; 146:14297-14306. [PMID: 38722613 PMCID: PMC11117184 DOI: 10.1021/jacs.4c03938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/25/2024] [Accepted: 04/29/2024] [Indexed: 05/23/2024]
Abstract
The triplet excited states of sulfur dioxide can be accessed in the UV region and have a lifetime large enough that they can react with atmospheric trace gases. In this work, we report high level ab initio calculations for the reaction of the a3B1 and b3A2 excited states of SO2 with weak and strong acidic species such as HCOOH and HNO3, aimed to extend the chemistry reported in previous studies with nonacidic H atoms (water and alkanes). The reactions investigated in this work are very versatile and follow different kinds of mechanisms, namely, proton-coupled electron transfer (pcet) and conventional hydrogen atom transfer (hat) mechanisms. The study provides new insights into a general and very important class of excited-state-promoted reactions, opening up interesting chemical perspectives for technological applications of photoinduced H-transfer reactions. It also reveals that atmospheric triplet chemistry is more significant than previously thought.
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Affiliation(s)
- Josep M. Anglada
- Departament
de Química Biològica (IQAC − CSIC), c/Jordi Girona 18, Barcelona E-08034, Spain
| | - Marilia T. C. Martins-Costa
- Laboratoire
de Physique et Chimie Théoriques, UMR CNRS 7019, University of Lorraine, CNRS, BP 70239, Vandoeuvre-lès-Nancy 54506, France
| | - Joseph S. Francisco
- Department
of Earth and Environmental Science and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6316, United States
| | - Manuel F. Ruiz-López
- Laboratoire
de Physique et Chimie Théoriques, UMR CNRS 7019, University of Lorraine, CNRS, BP 70239, Vandoeuvre-lès-Nancy 54506, France
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KAWAMURA K. Geochemical studies of low molecular weight organic acids in the atmosphere: sources, formation pathways, and gas/particle partitioning. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2023; 99:1-28. [PMID: 36631074 PMCID: PMC9851960 DOI: 10.2183/pjab.99.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 11/08/2022] [Indexed: 06/17/2023]
Abstract
Low molecular weight monocarboxylic acids (LMW monoacids, C1-C10) are the most abundant gaseous organic compound class in the atmosphere. Formic or acetic acid is the dominant volatile organic compound (VOC) in Earth's atmosphere. They can largely contribute to rainwater acidity, especially in the tropical forest, and react with alkaline metals, ammonia, and amines, contributing to new particle formation and secondary organic aerosol production. Gaseous and particulate LMW monoacids were abundantly reported in China. They can be directly emitted from fossil fuel combustion and biomass burring; however, the secondary formation is more important than primary emissions via the photochemical oxidation of anthropogenic and biogenic VOCs. In this paper, we review the distributions of LMW monoacids from urban, mountain, and marine sites as well as from rainwater and alpine snow samples and discuss their sources and formation mechanisms in the atmosphere. We also discuss their importance as cloud condensation nuclei (CCN) and provide future perspectives of LMW monoacids study in the warming world.
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Affiliation(s)
- Kimitaka KAWAMURA
- Chubu Institute for Advanced Studies, Chubu University, Kasugai, Japan
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Traversi R, Becagli S, Brogioni M, Caiazzo L, Ciardini V, Giardi F, Legrand M, Macelloni G, Petkov B, Preunkert S, Scarchilli C, Severi M, Vitale V, Udisti R. Multi-year record of atmospheric and snow surface nitrate in the central Antarctic plateau. CHEMOSPHERE 2017; 172:341-354. [PMID: 28088024 DOI: 10.1016/j.chemosphere.2016.12.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 12/26/2016] [Accepted: 12/28/2016] [Indexed: 06/06/2023]
Abstract
Continuous all year-round samplings of atmospheric aerosol and surface snow at high (daily to 4-day) resolution were carried out at Dome C since 2004-05 to 2013 and nitrate records are here presented. Basing on a larger statistical data set than previous studies, results confirm that nitrate seasonal pattern is characterized by maxima during austral summer for both aerosol and surface snow, occurring in-phase with solar UV irradiance. This temporal pattern is likely due to a combination of nitrate sources and post-depositional processes whose intensity usually enhances during the summer. Moreover, it should be noted that a case study of the synoptic conditions, which took place during a major nitrate event, showed the occurrence of a stratosphere-troposphere exchange. The sampling of both matrices at the same time with high resolution allowed the detection of a an about one-month long recurring lag of summer maxima in snow with respect to aerosol. This result can be explained by deposition and post-deposition processes occurring at the atmosphere-snow interface, such as a net uptake of gaseous nitric acid and a replenishment of the uppermost surface layers driven by a larger temperature gradient in summer. This hypothesis was preliminarily tested by a comparison with surface layers temperature data in the 2012-13 period. The analysis of the relationship between the nitrate concentration in the gas phase and total nitrate obtained at Dome C (2012-13) showed the major role of gaseous HNO3 to the total nitrate budget suggesting the need to further investigate the gas-to-particle conversion processes.
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Affiliation(s)
- R Traversi
- Dept. of Chemistry "Ugo Schiff", University of Florence, Sesto F.no, Florence, Italy
| | - S Becagli
- Dept. of Chemistry "Ugo Schiff", University of Florence, Sesto F.no, Florence, Italy
| | | | - L Caiazzo
- Dept. of Chemistry "Ugo Schiff", University of Florence, Sesto F.no, Florence, Italy
| | - V Ciardini
- ENEA, Laboratory for Observations and Analyses of the earth and Climate (SSPT-PROTER-OAC), Rome
| | - F Giardi
- Dept. of Chemistry "Ugo Schiff", University of Florence, Sesto F.no, Florence, Italy
| | - M Legrand
- Université Grenoble Alpes, CNRS, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), Grenoble, France
| | | | | | - S Preunkert
- Université Grenoble Alpes, CNRS, Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), Grenoble, France
| | - C Scarchilli
- ENEA, Laboratory for Observations and Analyses of the earth and Climate (SSPT-PROTER-OAC), Rome
| | - M Severi
- Dept. of Chemistry "Ugo Schiff", University of Florence, Sesto F.no, Florence, Italy
| | | | - R Udisti
- Dept. of Chemistry "Ugo Schiff", University of Florence, Sesto F.no, Florence, Italy; ISAC-CNR, Bologna, Italy
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Legrand M, Gros V, Preunkert S, Sarda-Estève R, Thierry AM, Pépy G, Jourdain B. A reassessment of the budget of formic and acetic acids in the boundary layer at Dumont d'Urville (coastal Antarctica): The role of penguin emissions on the budget of several oxygenated volatile organic compounds. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011jd017102] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Legrand M, Puxbaum H. Summary of the CARBOSOL project: Present and retrospective state of organic versus inorganic aerosol over Europe. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd008271] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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