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Gao Q, Shen C, Zhang H, Long B, Truhlar DG. Quantitative kinetics reveal that reactions of HO 2 are a significant sink for aldehydes in the atmosphere and may initiate the formation of highly oxygenated molecules via autoxidation. Phys Chem Chem Phys 2024; 26:16160-16174. [PMID: 38787752 DOI: 10.1039/d4cp00693c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
Large aldehydes are widespread in the atmosphere and their oxidation leads to secondary organic aerosols. The current understanding of their chemical transformation processes is limited to hydroxyl radical (OH) oxidation during daytime and nitrate radical (NO3) oxidation during nighttime. Here, we report quantitative kinetics calculations of the reactions of hexanal (C5H11CHO), pentanal (C4H9CHO), and butanal (C3H7CHO) with hydroperoxyl radical (HO2) at atmospheric temperatures and pressures. We find that neither tunneling nor multistructural torsion anharmonicity should be neglected in computing these rate constants; strong anharmonicity at the transition states is also important. We find rate constants for the three reactions in the range 3.2-7.7 × 10-14 cm3 molecule-1 s-1 at 298 K and 1 atm, showing that the HO2 reactions can be competitive with OH and NO3 oxidation under some conditions relevant to the atmosphere. Our findings reveal that HO2-initiated oxidation of large aldehydes may be responsible for the formation of highly oxygenated molecules via autoxidation. We augment the theoretic studies with laboratory flow-tube experiments using an iodide-adduct time-of-flight chemical ionization mass spectrometer to confirm the theoretical predictions of peroxy radicals and the autoxidation pathway. We find that the adduct from HO2 + C5H11CHO undergoes a fast unimolecular 1,7-hydrogen shift with a rate constant of 0.45 s-1. We suggest that the HO2 reactions make significant contributions to the sink of aldehydes.
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Affiliation(s)
- Qiao Gao
- School of Physics and Mechatronic Engineering, Guizhou Minzu University, Guiyang 550025, China.
| | - Chuanyang Shen
- Department of Chemistry, University of California, Riverside, California, 92507, USA.
| | - Haofei Zhang
- Department of Chemistry, University of California, Riverside, California, 92507, USA.
| | - Bo Long
- School of Physics and Mechatronic Engineering, Guizhou Minzu University, Guiyang 550025, China.
- College of Materials Science and Engineering, Guizhou Minzu university, Guiyang 550025, China
| | - Donald G Truhlar
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, USA.
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2
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Chao W, Markus CR, Okumura M, Winiberg FAF, Percival CJ. Chemical Kinetic Study of the Reaction of CH 2OO with CH 3O 2. J Phys Chem Lett 2024; 15:3690-3697. [PMID: 38546268 DOI: 10.1021/acs.jpclett.4c00159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Criegee intermediates play an important role in the oxidizing capacity of the Earth's troposphere. Although extensive studies have been conducted on Criegee intermediates in the past decade, their kinetics with radical species remain underexplored. We investigated the kinetics of the simplest Criegee intermediate, CH2OO, with the methyl peroxy radical, CH3O2, as a model system to explore the reactivities of Criegee intermediates with peroxy radicals. Using a multipass UV-Vis spectrometer coupled to a pulsed-laser photolysis flow reactor, CH2OO and CH3O2 were generated simultaneously from the photolysis of CH2I2/CH3I/O2/N2 mixtures with CH2OO measured directly near 340 nm. We determined a reaction rate coefficient kCH2OO+CH3O2 = (1.7 ± 0.5) × 10-11 cm3 s-1 at 294 K and 10 Torr, where the influence of iodine adducts is reduced. This rate coefficient is faster than previous theoretical predictions, highlighting the challenges in accurately describing the interaction between zwitterionic and biradical characteristics of Criegee intermediates.
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Affiliation(s)
- Wen Chao
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd, Pasadena, California 91125, United States
| | - Charles R Markus
- NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109-8099, United States
| | - Mitchio Okumura
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd, Pasadena, California 91125, United States
| | - Frank A F Winiberg
- NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109-8099, United States
| | - Carl J Percival
- NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109-8099, United States
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3
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Welsh BA, Corrigan ME, Assaf E, Nauta K, Sebastianelli P, Jordan MJT, Fittschen C, Kable SH. Photophysical oxidation of HCHO produces HO 2 radicals. Nat Chem 2023; 15:1350-1357. [PMID: 37414879 DOI: 10.1038/s41557-023-01272-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 06/07/2023] [Indexed: 07/08/2023]
Abstract
Formaldehyde, HCHO, is the highest-volume carbonyl in the atmosphere. It absorbs sunlight at wavelengths shorter than 330 nm and photolyses to form H and HCO radicals, which then react with O2 to form HO2. Here we show HCHO has an additional HO2 formation pathway. At photolysis energies below the energetic threshold for radical formation we directly detect HO2 at low pressures by cavity ring-down spectroscopy and indirectly detect HO2 at 1 bar by Fourier-transform infrared spectroscopy end-product analysis. Supported by electronic structure theory and master equation simulations, we attribute this HO2 to photophysical oxidation (PPO): photoexcited HCHO relaxes non-radiatively to the ground electronic state where the far-from-equilibrium, vibrationally activated HCHO molecules react with thermal O2. PPO is likely to be a general mechanism in tropospheric chemistry and, unlike photolysis, PPO will increase with increasing O2 pressure.
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Affiliation(s)
- Blair A Welsh
- School of Chemistry, University of New South Wales, Kensington, New South Wales, Australia
- Combustion Research Facility, Sandia National Laboratories, Livermore, CA, USA
| | - Maggie E Corrigan
- School of Chemistry, University of Sydney, Sydney, New South Wales, Australia
| | - Emmanuel Assaf
- Université Lille, CNRS, UMR 8522, PC2A-Physicochimie des Processus de Combustion et de l'Atmosphère, Lille, France
- Chemical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - Klaas Nauta
- School of Chemistry, University of New South Wales, Kensington, New South Wales, Australia
| | - Paolo Sebastianelli
- School of Chemistry, University of New South Wales, Kensington, New South Wales, Australia
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, New South Wales, Australia
| | - Meredith J T Jordan
- School of Chemistry, University of Sydney, Sydney, New South Wales, Australia.
| | - Christa Fittschen
- Université Lille, CNRS, UMR 8522, PC2A-Physicochimie des Processus de Combustion et de l'Atmosphère, Lille, France
| | - Scott H Kable
- School of Chemistry, University of New South Wales, Kensington, New South Wales, Australia.
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4
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Long B, Xia Y, Truhlar DG. Quantitative Kinetics of HO 2 Reactions with Aldehydes in the Atmosphere: High-Order Dynamic Correlation, Anharmonicity, and Falloff Effects Are All Important. J Am Chem Soc 2022; 144:19910-19920. [PMID: 36264240 DOI: 10.1021/jacs.2c07994] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Kinetics provides the fundamental parameters for elucidating sources and sinks of key atmospheric species and for atmospheric modeling more generally. Obtaining quantitative kinetics in the laboratory for the full range of atmospheric temperatures and pressures is quite difficult. Here, we use computational chemistry to obtain quantitative rate constants for the reactions of HO2 with HCHO, CH3CHO, and CF3CHO. First, we calculate the high-pressure-limit rate constants by using a dual-level strategy that combines conventional transition state theory using a high level of electronic structure wave function theory with canonical variational transition state theory including small-curvature tunneling using density functional theory. The wave-function level is beyond-CCSD(T) for HCHO and CCSD(T)-F12a (Level-A) for XCHO (X = CH3, CF3), and the density functional (Level-B) is specifically validated for these reactions. Then, we calculate the pressure-dependent rate constants by using system-specific quantum RRK theory (SS-QRRK) and also by an energy-grained master equation. The two treatments of the pressure dependence agree well. We find that the Level-A//Level-B method gives good agreement with CCSDTQ(P)/CBS. We also find that anharmonicity is an important factor that increases the rate constants of all three reactions. We find that the HO2 + HCHO reaction has a significant dependence on pressure, but the HO2 + CF3CHO reaction is almost independent of pressure. Our findings show that the HO2 + HCHO reaction makes important contribution to the sink for HCHO, and the HO2 + CF3CHO reaction is the dominant sink for CF3CHO in the atmosphere.
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Affiliation(s)
- Bo Long
- College of Materials Science and Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Yu Xia
- College of Materials Science and Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Donald G Truhlar
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
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5
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Shi G, Song J. Quantum chemical and theoretical kinetics studies on the reactions of hydroperoxy radical with methanethiol and ethanethiol. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Assali M, Fittschen C. Self-Reaction of Acetonyl Peroxy Radicals and Their Reaction with Cl Atoms. J Phys Chem A 2022; 126:4585-4597. [PMID: 35793477 DOI: 10.1021/acs.jpca.2c02602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The rate constant for the self-reaction of the acetonyl peroxy radicals, CH3C(O)CH2O2, has been determined using laser photolysis/continuous wave cavity ring down spectroscopy (cw-CRDS). CH3C(O)CH2O2 radicals have been generated from the reaction of Cl atoms with CH3C(O)CH3, and the concentration time profiles of four radicals (HO2, CH3O2, CH3C(O)O2, and CH3C(O)CH2O2) have been determined by cw-CRDS in the near-infrared. The rate constant for the self-reaction was found to be k = (5.4 ± 1.4) × 10-12 cm3 s-1, in good agreement with a recently published value (Zuraski, K., et al. J. Phys. Chem. A 2020, 124, 8128); however, the branching ratio for the radical path was found to be ϕ1b = (0.6 ± 0.1), which is well above the recently published value (0.33 ± 0.13). The influence of a fast reaction of Cl atoms with the CH3C(O)CH2O2 radical became evident under some conditions; therefore, this reaction has been investigated in separate experiments. Through the simultaneous fitting of all four radical profiles to a complex mechanism, a very fast rate constant of k = (1.35 ± 0.8) × 10-10 cm3 s-1 was found, and experimental results could be reproduced only if Cl atoms would partially react through H-atom abstraction to form the Criegee intermediate with a branching fraction of ϕCriegee = (0.55 ± 0.1). Modeling the HO2 concentration-time profiles was possible only if a subsequent reaction of the Criegee intermediate with CH3C(O)CH3 was included in the mechanism leading to HO2 formation with a rate constant of k = (4.5 ± 2.0) × 10-14 cm3 s-1.
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Affiliation(s)
- Mohamed Assali
- Université Lille, CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000 Lille, France
| | - Christa Fittschen
- Université Lille, CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000 Lille, France
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7
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Shi G, Song J. Theoretical investigation on the mechanisms and kinetics of the reactions of hydroperoxy radical with dimethyl sulphide and ethyl methyl sulphide. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2101561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Gai Shi
- State Key Laboratory of Engines, Tianjin University, Tianjin, People’s Republic of China
| | - Jinou Song
- State Key Laboratory of Engines, Tianjin University, Tianjin, People’s Republic of China
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8
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Berndt T, Chen J, Kjærgaard ER, Møller KH, Tilgner A, Hoffmann EH, Herrmann H, Crounse JD, Wennberg PO, Kjaergaard HG. Hydrotrioxide (ROOOH) formation in the atmosphere. Science 2022; 376:979-982. [PMID: 35617402 DOI: 10.1126/science.abn6012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Organic hydrotrioxides (ROOOH) are known to be strong oxidants used in organic synthesis. Previously, it has been speculated that they are formed in the atmosphere through the gas-phase reaction of organic peroxy radicals (RO2) with hydroxyl radicals (OH). Here, we report direct observation of ROOOH formation from several atmospherically relevant RO2 radicals. Kinetic analysis confirmed rapid RO2 + OH reactions forming ROOOH, with rate coefficients close to the collision limit. For the OH-initiated degradation of isoprene, global modeling predicts molar hydrotrioxide formation yields of up to 1%, which represents an annual ROOOH formation of about 10 million metric tons. The atmospheric lifetime of ROOOH is estimated to be minutes to hours. Hydrotrioxides represent a previously omitted substance class in the atmosphere, the impact of which needs to be examined.
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Affiliation(s)
- Torsten Berndt
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany
| | - Jing Chen
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
| | - Eva R Kjærgaard
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
| | - Kristian H Møller
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
| | - Andreas Tilgner
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany
| | - Erik H Hoffmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany
| | - John D Crounse
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
| | - Paul O Wennberg
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.,Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
| | - Henrik G Kjaergaard
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
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9
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Grinberg Dana A, Wu H, Ranasinghe DS, Pickard FC, Wood GPF, Zelesky T, Sluggett GW, Mustakis J, Green WH. Kinetic Modeling of API Oxidation: (1) The AIBN/H 2O/CH 3OH Radical "Soup". Mol Pharm 2021; 18:3037-3049. [PMID: 34236207 DOI: 10.1021/acs.molpharmaceut.1c00261] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stress testing of active pharmaceutical ingredients (API) is an important tool used to gauge chemical stability and identify potential degradation products. While different flavors of API stress testing systems have been used in experimental investigations for decades, the detailed kinetics of such systems as well as the chemical composition of prominent reactive species, specifically reactive oxygen species, are unknown. As a first step toward understanding and modeling API oxidation in stress testing, we investigated a typical radical "soup" solution an API is subject to during stress testing. Here we applied ab initio electronic structure calculations to automatically generate and refine a detailed chemical kinetics model, taking a fresh look at API oxidation. We generated a detailed kinetic model for a representative azobis(isobutyronitrile) (AIBN)/H2O/CH3OH stress-testing system with a varied cosolvent ratio (50%/50%-99.5%/0.5% vol water/methanol) for 5.0 mM AIBN and representative pH values of 4-10 at 40 °C that was stirred and open to the atmosphere. At acidic conditions, hydroxymethyl alkoxyl is the dominant alkoxyl radical, and at basic conditions, for most studied initial methanol concentrations, cyanoisopropyl alkoxyl becomes the dominant alkoxyl radical, albeit at an overall lower concentration. At acidic conditions, the levels of cyanoisopropyl peroxyl, hydroxymethyl peroxyl, and hydroperoxyl radicals are relatively high and comparable, while, at both neutral and basic pH conditions, superoxide becomes the prominent radical in the system. The present work reveals the prominent species in a common model API stress testing system at various cosolvent and pH conditions, sets the stage for an in-depth quantitative API kinetic study, and demonstrates the usage of novel software tools for automated chemical kinetic model generation and ab initio refinement.
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Affiliation(s)
- Alon Grinberg Dana
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,Wolfson Department of Chemical Engineering, Technion, Israel Institute of Technology, Haifa 3200003, Israel
| | - Haoyang Wu
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Duminda S Ranasinghe
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Frank C Pickard
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Geoffrey P F Wood
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Todd Zelesky
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Gregory W Sluggett
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Jason Mustakis
- Pfizer Global Research & Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
| | - William H Green
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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10
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Glarborg P, Andreasen CS, Hashemi H, Qian R, Marshall P. Oxidation of methylamine. INT J CHEM KINET 2020. [DOI: 10.1002/kin.21408] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Peter Glarborg
- Department of Chemical and Biochemical Engineering Technical University of Denmark Lyngby Denmark
| | - Charlotte S. Andreasen
- Department of Chemical and Biochemical Engineering Technical University of Denmark Lyngby Denmark
| | - Hamid Hashemi
- Department of Chemical and Biochemical Engineering Technical University of Denmark Lyngby Denmark
| | - Rachel Qian
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling University of North Texas Denton Texas
| | - Paul Marshall
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling University of North Texas Denton Texas
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11
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Allen HM, Crounse JD, Bates KH, Teng AP, Krawiec-Thayer MP, Rivera-Rios JC, Keutsch FN, St. Clair JM, Hanisco TF, Møller KH, Kjaergaard HG, Wennberg PO. Kinetics and Product Yields of the OH Initiated Oxidation of Hydroxymethyl Hydroperoxide. J Phys Chem A 2018; 122:6292-6302. [DOI: 10.1021/acs.jpca.8b04577] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | - Jean C. Rivera-Rios
- Paulson School of Engineering and Applied Sciences and Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Frank N. Keutsch
- Paulson School of Engineering and Applied Sciences and Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Jason M. St. Clair
- Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, Maryland 21228, United States
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, United States
| | - Thomas F. Hanisco
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, United States
| | - Kristian H. Møller
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Henrik G. Kjaergaard
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
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12
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Patros KM, Mann JE, Jarrold CC. O 2-·[Polar VOC] Complexes: H-Bonding versus Charge-Dipole Interactions, and the Noninnocence of Formaldehyde. J Phys Chem A 2017; 121:5459-5467. [PMID: 28671848 DOI: 10.1021/acs.jpca.7b05124] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Anion photoelectron imaging was used to measure the photodetachment spectra of molecular complexes formed between O2- and a range of atmospherically relevant polar molecules, including species with a carbonyl group (acetone, formaldehyde) and alcohols (ethanol, propenol, butenol). Experimental spectra are analyzed using a combination of Franck-Condon simulations and electronic structure calculations. Strong charge-dipole interactions and H-bonding stabilize the complex anions relative to the neutrals, resulting in a ca. 1 eV increase in electron binding energy relative to bare O2-, an effect more pronounced in complexes with H-bonding. In addition, broken degeneracy of the O2-local πg orbitals in the complexes results in the stabilization of the low-lying excited O2 (a 1Δg)·[polar VOC] state relative to the ground O2 (X 3Σg-)·[polar VOC] state when compared to bare O2. The spectra of the O2-·[polar VOC] complexes exhibit less pronounced laser photoelectron angular distribution (PADs). The spectrum of O2-·formaldehyde is unique in terms of both spectral profile and PAD. On the basis of these experimental results in addition to computational results, the complex anion cannot be described as a distinct O2- anion partnered with an innocent solvent molecule; the molecules are more strongly coupled through charge delocalization. Overall, the results underscore how the symmetry of the O2 πg orbitals is broken by different polar partners, which may have implications for atmospheric photochemistry and models of solar radiation absorption that include collision-induced absorption.
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Affiliation(s)
- Kellyn M Patros
- Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Jennifer E Mann
- Physical Electronics , 18725 Lake Drive East, Chanhassen, Minnesota, 55317, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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13
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Linguerri R, Puzzarini C, Al Mogren MM, Francisco JS, Hochlaf M. Benchmark study of the structural and spectroscopic parameters of the hydroxymethyl peroxy (HOCH2OO) radical and its decomposition reaction to HO2 and H2CO. J Chem Phys 2017; 146:144303. [DOI: 10.1063/1.4979573] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Roberto Linguerri
- Laboratorie Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, Université Paris-Est, 5 Blvd. Descartes, 77454 Marne-la-Vallée, France
| | - Cristina Puzzarini
- Dipartimento di Chimica “Giacomo Ciamician,” Universitá di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Muneerah Mogren Al Mogren
- Chemistry Department, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Joseph S. Francisco
- Department of Chemistry and Department of Earth and Atmospheric Science, Purdue University, West Lafayette, Indiana 47907-1393, USA
| | - Majdi Hochlaf
- Laboratorie Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, Université Paris-Est, 5 Blvd. Descartes, 77454 Marne-la-Vallée, France
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14
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Sun C, Zeng Y, Xu B, Meng L. Mechanism and kinetics for the reactions of methacrolein and methyl vinyl ketone with HO2 radical. NEW J CHEM 2017. [DOI: 10.1039/c7nj01260h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism and kinetics for the reactions of unsaturated aldehyde and ketone with HO2 radical were investigated.
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Affiliation(s)
- Cuihong Sun
- College of Chemical Engineering
- Shijiazhuang University
- Shijiazhuang
- People's Republic of China
- College of Chemistry and Material Science
| | - Yanli Zeng
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- People's Republic of China
| | - Baoen Xu
- College of Chemical Engineering
- Shijiazhuang University
- Shijiazhuang
- People's Republic of China
| | - Lingpeng Meng
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- People's Republic of China
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15
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Long B, Tan XF, Bao JL, Wang DM, Long ZW. Theoretical Study of the Reaction Mechanism and Kinetics of HO2with XCHO (X = F, Cl). INT J CHEM KINET 2016. [DOI: 10.1002/kin.21062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Bo Long
- College of Computer and Information Engineering; Guizhou MinZu University; Guiyang 550025 People's Republic of China
| | - Xing-Feng Tan
- College of Computer and Information Engineering; Guizhou MinZu University; Guiyang 550025 People's Republic of China
| | - Junwei Lucas Bao
- Department of Chemistry; Chemical Theory Center, and Supercomputing Institute; University of Minnesota; Minneapolis MN 55455
| | - Ding-Mei Wang
- Department of Physics; Guizhou University; Guiyang 550025 People's Republic of China
| | - Zheng-Wen Long
- Department of Physics; Guizhou University; Guiyang 550025 People's Republic of China
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16
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Church JR, Skodje RT. Reaction Kinetics of HBr with HO2: A New Channel for Isotope Scrambling Reactions. J Phys Chem A 2016; 120:8503-8511. [DOI: 10.1021/acs.jpca.6b07215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jonathan R. Church
- Department
of Chemistry and
Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - Rex T. Skodje
- Department
of Chemistry and
Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
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17
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Bouzidi H, Djehiche M, Gierczak T, Morajkar P, Fittschen C, Coddeville P, Tomas A. Low-Pressure Photolysis of 2,3-Pentanedione in Air: Quantum Yields and Reaction Mechanism. J Phys Chem A 2015; 119:12781-9. [DOI: 10.1021/acs.jpca.5b09448] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hichem Bouzidi
- Mines Douai, SAGE, 59508 Douai, France
- Université de Lille, 59000 Lille, France
| | - Mokhtar Djehiche
- Mines Douai, SAGE, 59508 Douai, France
- Université de Lille, 59000 Lille, France
| | - Tomasz Gierczak
- Faculty
of Chemistry, Warsaw University, ul. Pasteura 1, Poland
| | - Pranay Morajkar
- Université de Lille 1, PC2A, UMR 8522 CNRS/Lille 1, 59655 Villeneuve d’Ascq, France
| | - Christa Fittschen
- Université de Lille 1, PC2A, UMR 8522 CNRS/Lille 1, 59655 Villeneuve d’Ascq, France
| | - Patrice Coddeville
- Mines Douai, SAGE, 59508 Douai, France
- Université de Lille, 59000 Lille, France
| | - Alexandre Tomas
- Mines Douai, SAGE, 59508 Douai, France
- Université de Lille, 59000 Lille, France
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18
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Morajkar P, Bossolasco A, Schoemaecker C, Fittschen C. Photolysis of CH3CHO at 248 nm: Evidence of triple fragmentation from primary quantum yield of CH3 and HCO radicals and H atoms. J Chem Phys 2014; 140:214308. [DOI: 10.1063/1.4878668] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Sprague MK, Mertens LA, Widgren HN, Okumura M, Sander SP, McCoy AB. Cavity Ringdown Spectroscopy of the Hydroxy-Methyl-Peroxy Radical. J Phys Chem A 2013; 117:10006-17. [DOI: 10.1021/jp400390y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew K. Sprague
- Arthur Amos Noyes Laboratory of Chemical
Physics, MC
127-72, California Institute of Technology, Pasadena, California 91125, United States
| | - Laura A. Mertens
- Arthur Amos Noyes Laboratory of Chemical
Physics, MC
127-72, California Institute of Technology, Pasadena, California 91125, United States
| | - Heather N. Widgren
- Arthur Amos Noyes Laboratory of Chemical
Physics, MC
127-72, California Institute of Technology, Pasadena, California 91125, United States
| | - Mitchio Okumura
- Arthur Amos Noyes Laboratory of Chemical
Physics, MC
127-72, California Institute of Technology, Pasadena, California 91125, United States
| | - Stanley P. Sander
- NASA Jet
Propulsion Laboratory, MC 183-901, California Institute of Technology, Pasadena, California
91109, United States
| | - Anne B. McCoy
- Department of Chemistry
and Biochemistry, The Ohio State University, Columbus,
Ohio 43210, United States
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