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Yuan DF, Trabelsi T, Zhang YR, Francisco JS, Wang LS. Probing the Electronic Structure and Bond Dissociation of SO 3 and SO 3- Using High-Resolution Cryogenic Photoelectron Imaging. J Am Chem Soc 2022; 144:13740-13747. [PMID: 35857818 DOI: 10.1021/jacs.2c04698] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The SO3 molecule and its radical anion SO3- are important chemical species atmospherically. However, their thermodynamic properties and electronic structures are not well known experimentally. Using cryogenically cooled anions, we have obtained high-resolution photoelectron images of SO3- and determined accurately the electron affinity (EA) of SO3 and the bond dissociation energy of SO3- → SO2 + O- for the first time. Because of the large geometry changes from the C3v SO3- to the D3h SO3, there is a negligible Franck-Condon factor (FCF) for the 0-0 detachment transition, that defines the EA of SO3. By fitting the high-resolution photoelectron spectra with computed FCFs using structures from high-level ab initio calculations, we have determined the EA of SO3 to be 2.126(6) eV. By monitoring the appearance of the O- signal in the photoelectron images at different photon energies, we are able to measure directly the bond dissociation energy of SO3-(X2A1) → SO2(X1A1) + O-(2P) to be 4.259 ± 0.006 eV, which also allow us to derive the dissociation energy for the spin-forbidden SO3(X1A1') → SO2(X1A1) + O(3P) to be 3.594(6) eV. The excited states of SO3- are calculated using high-level ab initio calculations, which are valuable in aiding the interpretation of autodetachment processes observed at various photon energies. The current study provides valuable information about the fundamental molecular properties of SO3, as well as the radical anion SO3-, which is known in redox reactions involving SO32- and may also play a role in the chemistry of SO2 in the atmosphere.
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Affiliation(s)
- Dao-Fu Yuan
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Tarek Trabelsi
- Department of Earth and Environmental Sciences and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Yue-Rou Zhang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Joseph S Francisco
- Department of Earth and Environmental Sciences and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Lai-Sheng Wang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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2
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Carmona-García J, Trabelsi T, Francés-Monerris A, Cuevas CA, Saiz-Lopez A, Roca-Sanjuán D, Francisco JS. Photochemistry of HOSO 2 and SO 3 and Implications for the Production of Sulfuric Acid. J Am Chem Soc 2021; 143:18794-18802. [PMID: 34726419 DOI: 10.1021/jacs.1c10153] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Sulfur trioxide (SO3) and the hydroxysulfonyl radical (HOSO2) are two key intermediates in the production of sulfuric acid (H2SO4) on Earth's atmosphere, one of the major components of acid rain. Here, the photochemical properties of these species are determined by means of high-level quantum chemical methodologies, and the potential impact of their light-induced reactivity is assessed within the context of the conventional acid rain generation mechanism. Results reveal that the photodissociation of HOSO2 occurs primarily in the stratosphere through the ejection of hydroxyl radicals (•OH) and sulfur dioxide (SO2). This may decrease the production rate of H2SO4 in atmospheric regions with low O2 concentration. In contrast, the photostability of SO3 under stratospheric conditions suggests that its removal efficiency, still poorly understood, is key to assess the H2SO4 formation in the upper atmosphere.
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Affiliation(s)
- Javier Carmona-García
- Institut de Ciència Molecular, Universitat de València, València 46071, Spain.,Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid 28006, Spain
| | - Tarek Trabelsi
- Department of Earth and Environmental Sciences and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | | | - Carlos A Cuevas
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid 28006, Spain
| | - Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid 28006, Spain
| | - Daniel Roca-Sanjuán
- Institut de Ciència Molecular, Universitat de València, València 46071, Spain
| | - Joseph S Francisco
- Department of Earth and Environmental Sciences and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Brutti S, De Maria G, Cerri G, Giovannelli A, Brunetti B, Cafarelli P, Elvio Semprin,, Barbarossa V, Ceroli A. Decomposition of H2SO4 by Direct Solar Radiation. Ind Eng Chem Res 2007. [DOI: 10.1021/ie070245l] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergio Brutti
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
| | - Giovanni De Maria
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
| | - Giovanni Cerri
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
| | - Ambra Giovannelli
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
| | - Bruno Brunetti
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
| | - Patrizia Cafarelli
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
| | - Elvio Semprin,
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
| | - Vincenzo Barbarossa
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
| | - Antonio Ceroli
- Dip. di Chimica, Università di Roma “La Sapienza”, P.le A. Moro 5, 00185 Roma, Italy, Dip. di Ingegneria Meccanica e Industriale, Università di Roma Tre, Via della Vasca Navale 79, 00146 Roma, Italy, ISMN−CNR, Sezione Roma 1, P.le A. Moro 5, 00185 Roma, Italy, ISMN−CNR, Sezione Montelibretti, Via Salaria Km 29,300, Montelibretti, Italy, and ENEA−Research Center “Casaccia”, 00060 S. M. Di Galeria, Roma, Italy
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