1
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Zhang C, Li C, Zhang W, Tang X, Pillier L, Schoemaecker C, Fittschen C. Rate constant and branching ratio of the reaction of ethyl peroxy radicals with methyl peroxy radicals. Phys Chem Chem Phys 2023. [PMID: 37377107 DOI: 10.1039/d3cp01141k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
The cross-reaction of ethyl peroxy radicals (C2H5O2) with methyl peroxy radicals (CH3O2) (R1) has been studied using laser photolysis coupled to time resolved detection of the two different peroxy radicals by continuous wave cavity ring down spectroscopy (cw-CRDS) in their AÃ-X̃ electronic transition in the near-infrared region, C2H5O2 at 7602.25 cm-1, and CH3O2 at 7488.13 cm-1. This detection scheme is not completely selective for both radicals, but it is demonstrated that it has great advantages compared to the widely used, but unselective UV absorption spectroscopy. Peroxy radicals were generated from the reaction of Cl-atoms with the appropriate hydrocarbon (CH4 and C2H6) in the presence of O2, whereby Cl-atoms were generated by 351 nm photolysis of Cl2. For different reasons detailed in the manuscript, all experiments were carried out under excess of C2H5O2 over CH3O2. The experimental results were best reproduced by an appropriate chemical model with a rate constant for the cross-reaction of k = (3.8 ± 1.0) × 10-13 cm3 s-1 and a yield for the radical channel, leading to CH3O and C2H5O, of (ϕ1a = 0.40 ± 0.20).
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Affiliation(s)
- Cuihong Zhang
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
- Science Island Branch, Graduate School, University of Science and Technology of China, Hefei 230026, Anhui, China
- Université Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000 Lille, France.
| | - Chuanliang Li
- Université Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000 Lille, France.
- Shanxi Engineering Research Center of Precision Measurement and Online Detection Equipment and School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Weijun Zhang
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Xiaofeng Tang
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Laure Pillier
- Université Lille, CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000 Lille, France.
| | - Coralie Schoemaecker
- 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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2
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Jones IW, Bersson JS, Liu J, Sharma K, Vasilyev OA, Miller TA, Stanton JF. Calculated and Empirical Values of Vibronic Transition Dipole Moments of Reactive Chemical Intermediates for Determination of Concentrations. J Phys Chem A 2023. [PMID: 37216680 DOI: 10.1021/acs.jpca.3c01584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Absorption spectroscopy has long been known as a technique for making molecular concentration measurements and has received enhanced visibility in recent years with the advent of new techniques, like cavity ring-down spectroscopy, that have increased its sensitivity. To apply the method, it is necessary to have a known molecular absorption cross section for the species of interest, which typically is obtained by measurements of a standard sample of known concentration. However, this method fails if the species is highly reactive, and indirect means for attaining the cross section must be employed. The HO2 and alkyl peroxy radicals are examples of reactive species for which absorption cross sections have been reported. This work explores and describes for these peroxy radicals the details of an alternative approach for obtaining these cross sections using quantum chemistry methods for the calculation of the transition dipole moment upon whose square the cross section depends. Likewise, details are given for obtaining the transition moment from the experimentally measured cross sections of individual rovibronic lines in the near-IR Ã-X̃ electronic spectrum of HO2 and the peaks of the rotational contours in the corresponding electronic transitions for the alkyl (methyl, ethyl, and acetyl) peroxy radicals. In the case of the alkyl peroxy radicals, good agreement for the transition moments, ≈20%, is found between the two methods. However, rather surprisingly, the agreement is significantly poorer, ≈40%, for the HO2 radical. Possible reasons for this disagreement are discussed.
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Affiliation(s)
- Ian W Jones
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Jonathan S Bersson
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Jinjun Liu
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
- Department of Physics, University of Louisville, Louisville, Kentucky 40292, United States
| | - Ketan Sharma
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Oleg A Vasilyev
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Terry A Miller
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - John F Stanton
- Departments of Chemistry and Physics, University of Florida, Gainesville, Florida 32611, United States
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3
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Gao Y, Lu K, Zhang Y. Review of technologies and their applications for the speciated detection of RO 2 radicals. J Environ Sci (China) 2023; 123:487-499. [PMID: 36522008 DOI: 10.1016/j.jes.2022.09.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 06/17/2023]
Abstract
Peroxy radicals (RO2), which are formed during the oxidation of volatile organic compounds, play an important role in atmospheric oxidation reactions. Therefore, the measurement of RO2, especially distinct species of RO2 radicals, is important and greatly helps the exploration of atmospheric chemistry mechanisms. Although the speciated detection of RO2 radicals remains challenging, various methods have been developed to study them in detail. These methods can be divided into spectroscopy and mass spectrometry technologies. The spectroscopy methods contain laser-induced fluorescence (LIF), UV-absorption spectroscopy, cavity ring-down spectroscopy (CRDS) and matrix isolation and electron spin resonance (MIESR). The mass spectrometry methods contain chemical ionization atmospheric pressure interface time-of-flight mass spectrometry (CI-APi-TOF), chemical ionization mass spectrometry (CIMS), CI-Orbitrap-MS and the third-generation proton transfer reaction-time-of-flight mass spectrometer (PTR3). This article reviews technologies for the speciated detection of RO2 radicals and the applications of these methods. In addition, a comparison of these techniques and the reaction mechanisms of some key species are discussed. Finally, possible gaps are proposed that could be filled by future research into speciated RO2 radicals.
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Affiliation(s)
- Yue Gao
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Keding Lu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
| | - Yuanhang Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
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4
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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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5
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Rate Constants and Branching Ratios for the Self-Reaction of Acetyl Peroxy (CH3C(O)O2•) and Its Reaction with CH3O2. ATMOSPHERE 2022. [DOI: 10.3390/atmos13020186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The self-reaction of acetylperoxy radicals (CH3C(O)O2•) (R1) as well as their reaction with methyl peroxy radicals (CH3O2•) (R2) have been studied using laser photolysis coupled to a selective time resolved detection of three different radicals by cw-CRDS in the near-infrared range: CH3C(O)O2• was detected in the Ã-X˜ electronic transition at 6497.94 cm−1, HO2• was detected in the 2ν1 vibrational overtone at 6638.2 cm−1, and CH3O2• radicals were detected in the Ã-X˜ electronic transition at 7489.16 cm−1. Pulsed photolysis of different precursors at different wavelengths, always in the presence of O2, was used to generate CH3C(O)O2• and CH3O2• radicals: acetaldehyde (CH3CHO/Cl2 mixture or biacetyle (CH3C(O)C(O)CH3) at 351 nm, and acetone (CH3C(O)CH3) or CH3C(O)C(O)CH3 at 248 nm. From photolysis experiments using CH3C(O)C(O)CH3 or CH3C(O)CH3 as precursor, the rate constant for the self-reaction was found with k1 = (1.3 ± 0.3) × 10−11 cm3s−1, in good agreement with current recommendations, while the rate constant for the cross reaction with CH3O2• was found to be k2 = (2.0 ± 0.4) × 10−11 cm3s−1, which is nearly two times faster than current recommendations. The branching ratio of (R2) towards the radical products was found at 0.67, compared with 0.9 for the currently recommended value. Using the reaction of Cl•-atoms with CH3CHO as precursor resulted in radical profiles that were not reproducible by the model: secondary chemistry possibly involving Cl• or Cl2 might occur, but could not be identified.
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Absolute Absorption Cross-Section of the Ã←X˜ Electronic Transition of the Ethyl Peroxy Radical and Rate Constant of Its Cross Reaction with HO2. PHOTONICS 2021. [DOI: 10.3390/photonics8080296] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The absolute absorption cross-section of the ethyl peroxy radical C2H5O2 in the Ã←X˜ electronic transition with the peak wavelength at 7596 cm−1 has been determined by the method of dual wavelengths time resolved continuous wave cavity ring down spectroscopy. C2H5O2 radicals were generated from pulsed 351 nm photolysis of C2H6/Cl2 mixture in presence of 100 Torr O2 at T = 295 K. C2H5O2 radicals were detected on one of the CRDS paths. Two methods have been applied for the determination of the C2H5O2 absorption cross-section: (i) based on Cl-atoms being converted alternatively to either C2H5O2 by adding C2H6 or to hydro peroxy radicals, HO2, by adding CH3OH to the mixture, whereby HO2 was reliably quantified on the second CRDS path in the 2ν1 vibrational overtone at 6638.2 cm−1 (ii) based on the reaction of C2H5O2 with HO2, measured under either excess HO2 or under excess C2H5O2 concentration. Both methods lead to the same peak absorption cross-section for C2H5O2 at 7596 cm−1 of σ = (1.0 ± 0.2) × 10−20 cm2. The rate constant for the cross reaction between of C2H5O2 and HO2 has been measured to be (6.2 ± 1.5) × 10−12 cm3 molecule−1 s−1.
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8
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Assaf E, Schoemaecker C, Vereecken L, Fittschen C. Experimental and theoretical investigation of the reaction of RO2radicals with OH radicals: Dependence of the HO2yield on the size of the alkyl group. INT J CHEM KINET 2018. [DOI: 10.1002/kin.21191] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Emmanuel Assaf
- Université Lille; CNRS; UMR 8522, PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère; Lille France
| | - Coralie Schoemaecker
- Université Lille; CNRS; UMR 8522, PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère; Lille France
| | - Luc Vereecken
- Institut für Energie und Klimaforschung; Forschungszentrum Jülich GmbH; Jülich Germany
| | - Christa Fittschen
- Université Lille; CNRS; UMR 8522, PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère; Lille France
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9
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Chattopadhyay A, Samanta M, Mondal K, Chakraborty T. Mid-infrared quantum cascade laser spectroscopy probing of the kinetics of an atmospherically significant radical reaction,
$$\hbox {CH}_{3}\hbox {O}_{2}+\hbox {NO}_{2}+\hbox {M}\rightarrow \hbox {CH}_{3}\hbox {O}_{2}\hbox {NO}_{2}+\hbox {M}$$
CH
3
O
2
+
NO
2
+
M
→
CH
3
O
2
NO
2
+
M
, in the gas phase. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1451-2] [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]
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10
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Assaf E, Tanaka S, Kajii Y, Schoemaecker C, Fittschen C. Rate constants of the reaction of C2–C4 peroxy radicals with OH radicals. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.06.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Assaf E, Sheps L, Whalley L, Heard D, Tomas A, Schoemaecker C, Fittschen C. The Reaction between CH 3O 2 and OH Radicals: Product Yields and Atmospheric Implications. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:2170-2177. [PMID: 28121426 DOI: 10.1021/acs.est.6b06265] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The reaction between CH3O2 and OH radicals has been shown to be fast and to play an appreciable role for the removal of CH3O2 radials in remote environments such as the marine boundary layer. Two different experimental techniques have been used here to determine the products of this reaction. The HO2 yield has been obtained from simultaneous time-resolved measurements of the absolute concentration of CH3O2, OH, and HO2 radicals by cw-CRDS. The possible formation of a Criegee intermediate has been measured by broadband cavity enhanced UV absorption. A yield of ϕHO2 = (0.8 ± 0.2) and an upper limit for ϕCriegee = 0.05 has been determined for this reaction, suggesting a minor yield of methanol or stabilized trioxide as a product. The impact of this reaction on the composition of the remote marine boundary layer has been determined by implementing these findings into a box model utilizing the Master Chemical Mechanism v3.2, and constraining the model for conditions found at the Cape Verde Atmospheric Observatory in the remote tropical Atlantic Ocean. Inclusion of the CH3O2+OH reaction into the model results in up to 30% decrease in the CH3O2 radical concentration while the HO2 concentration increased by up to 20%. Production and destruction of O3 are also influenced by these changes, and the model indicates that taking into account the reaction between CH3O2 and OH leads to a 6% decrease of O3.
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Affiliation(s)
- Emmanuel Assaf
- Université Lille, CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000 Lille, France
| | - Leonid Sheps
- Combustion Research Facility, Sandia National Laboratories , 7011 East Ave., Livermore, California 94551 United States
| | - Lisa Whalley
- School of Chemistry, University of Leeds , Woodhouse Lane, Leeds, LS2 9JT, U.K
- National Centre for Atmospheric Chemistry, University of Leeds , Woodhouse Lane, Leeds, LS2 9JT, U.K
| | - Dwayne Heard
- School of Chemistry, University of Leeds , Woodhouse Lane, Leeds, LS2 9JT, U.K
- National Centre for Atmospheric Chemistry, University of Leeds , Woodhouse Lane, Leeds, LS2 9JT, U.K
| | - Alexandre Tomas
- IMT Lille Douai, Université Lille, SAGE - Département Sciences de l'Atmosphère et Génie de l'Environnement, 59000 Lille, France
| | - Coralie Schoemaecker
- 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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12
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Assaf E, Song B, Tomas A, Schoemaecker C, Fittschen C. Rate Constant of the Reaction between CH 3O 2 Radicals and OH Radicals Revisited. J Phys Chem A 2016; 120:8923-8932. [PMID: 27790905 DOI: 10.1021/acs.jpca.6b07704] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction between CH3O2 and OH radicals has been studied in a laser photolysis cell using the reaction of F atoms with CH4 and H2O for the simultaneous generation of both radicals, with F atoms generated through 248 nm photolysis of XeF2. An experimental setup combining cw-Cavity Ring Down Spectroscopy (cw-CRDS) and high repetition rate laser-induced fluorescence (LIF) to a laser photolysis cell has been used. The absolute concentration of CH3O2 was measured by cw-CRDS, while the relative concentration of OH(v = 0) radicals was determined by LIF. To remove dubiety from the quantification of CH3O2 by cw-CRDS in the near-infrared, its absorption cross section has been determined at 7489.16 cm-1 using two different methods. A rate constant of k1 = (1.60 ± 0.4) × 10-10 cm3 s-1 has been determined at 295 K, nearly a factor of 2 lower than an earlier determination from our group ((2.8 ± 1.4) × 10-10 cm3 s-1) using CH3I photolysis as a precursor. Quenching of electronically excited I atoms (from CH3I photolysis) in collision with OH(v = 0) is suspected to be responsible for a bias in the earlier, fast rate constant.
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Affiliation(s)
- Emmanuel Assaf
- Université Lille , CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000 Lille, France
| | - Bo Song
- Université Lille , CNRS, UMR 8522-PC2A-Physicochimie des Processus de Combustion et de l'Atmosphère, F-59000 Lille, France
| | - Alexandre Tomas
- Mines Douai , Département Sciences de l'Atmosphère et Génie de l'Environnement (SAGE), F-59508 Douai, France.,Université Lille Nord de France , F-59000 Lille, France
| | - Coralie Schoemaecker
- 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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Assaf E, Fittschen C. Cross Section of OH Radical Overtone Transition near 7028 cm–1 and Measurement of the Rate Constant of the Reaction of OH with HO2 Radicals. J Phys Chem A 2016; 120:7051-9. [DOI: 10.1021/acs.jpca.6b06477] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Emmanuel Assaf
- CNRS, UMR 8522 - PC2A - Physicochimie
des Processus de Combustion et de l’Atmosphère, Université Lille, F-59000 Lille, France
| | - Christa Fittschen
- CNRS, UMR 8522 - PC2A - Physicochimie
des Processus de Combustion et de l’Atmosphère, Université Lille, F-59000 Lille, France
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14
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Yan C, Kocevska S, Krasnoperov LN. Kinetics of the Reaction of CH3O2 Radicals with OH Studied over the 292–526 K Temperature Range. J Phys Chem A 2016; 120:6111-21. [DOI: 10.1021/acs.jpca.6b04213] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chao Yan
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology,
University Heights, Newark, New Jersey 07102, United States
| | - Stefani Kocevska
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology,
University Heights, Newark, New Jersey 07102, United States
| | - Lev N. Krasnoperov
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology,
University Heights, Newark, New Jersey 07102, United States
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15
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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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16
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Faragó EP, Schoemaecker C, Viskolcz B, Fittschen C. Experimental determination of the rate constant of the reaction between C 2 H 5 O 2 and OH radicals. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2014.11.069] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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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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18
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