1
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Thawoos S, Hall GE, Cavallotti C, Suits AG. Kinetics of CN ( v = 1) reactions with butadiene isomers at low temperature by cw-cavity ring-down in a pulsed Laval flow with theoretical modelling of rates and entrance channel branching. Faraday Discuss 2023; 245:245-260. [PMID: 37317673 DOI: 10.1039/d3fd00029j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
We present an experimental and theoretical investigation of the reaction of vibrationally excited CN (v = 1) with isomers of butadiene at low temperature. The experiments were conducted using the newly built apparatus, UF-CRDS, which couples near-infrared cw-cavity ring-down spectroscopy with a pulsed Laval flow. The well-matched hydrodynamic time and long ring-down time decays allow measurement of the kinetics of the reactions within a single trace of a ring-down decay, termed Simultaneous Kinetics and Ring-down (SKaR). The pulsed experiments were carried out using a Laval nozzle designed for the 70 K uniform flow with nitrogen as the carrier gas. The measured bimolecular rates for the reactions of CN (v = 1) with 1,3-butadiene and 1,2-butadiene are (3.96 ± 0.28) × 10-10 and (3.06 ± 0.35) × 10-10 cm3 per molecule per s, respectively. The reaction rate measured for CN (v = 1) with the 1,3-butadiene isomer is in good agreement with the rate previously reported for the reaction with ground state CN (v = 0) under similar conditions. We report the rate of the reaction of CN (v = 1) with the 1,2-butadiene isomer here for the first time. The experimental results were interpreted with the aid of variable reaction-coordinate transition-state theory calculations to determine rates and branching of the addition channels based on a high-level multireference treatment of the potential energy surface. H-abstraction reaction rates were also theoretically determined. For the 1,2-butadiene system, theoretical estimates are then combined with literature values for the energy-dependent product yields from the initial adducts to predict overall temperature-dependent product branching. H loss giving 2-cyano-1,3-butadiene + H is the main product channel, exclusive of abstraction, at all energies, but methyl loss forming 1-cyano-prop-3-yne is 15% at low temperature growing to 35% at 500 K. Abstraction forming HCN and various radicals is important at 500 K and above. The astrochemical implications of these results are discussed.
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Affiliation(s)
- Shameemah Thawoos
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA.
| | - Gregory E Hall
- Chemistry Division, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Carlo Cavallotti
- Department of Chemistry, Materials, and Chemical Engineering "G. Natta", Politecnico di Milano, Milano 20133, Italy
| | - Arthur G Suits
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA.
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2
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Jarrold CC. Probing Anion-Molecule Complexes of Atmospheric Relevance Using Anion Photoelectron Detachment Spectroscopy. ACS PHYSICAL CHEMISTRY AU 2023; 3:17-29. [PMID: 36718261 PMCID: PMC9881448 DOI: 10.1021/acsphyschemau.2c00060] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 01/01/2023]
Abstract
Bimolecular reaction and collision complexes that drive atmospheric chemistry and contribute to the absorption of solar radiation are fleeting and therefore inherently challenging to study experimentally. Furthermore, primary anions in the troposphere are short lived because of a complicated web of reactions and complex formation they undergo, making details of their early fate elusive. In this perspective, the experimental approach of photodetaching mass-selected anion-molecule complexes or complex anions, which prepares neutrals in various vibronic states, is surveyed. Specifically, the application of anion photoelectron spectroscopy along with photoelectron-photofragment coincidence spectroscopy toward the study of collision complexes, complex anions in which a partial covalent bond is formed, and radical bimolecular reaction complexes, with relevance in tropospheric chemistry, will be highlighted.
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Affiliation(s)
- Caroline Chick Jarrold
- Department of Chemistry, Indiana
University, 800 East Kirkwood, Avenue
Bloomington, Indiana47405, United States
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3
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Welz O, Pfeifle M, Plehiers PM, Sure R, Deglmann P. Reaction of OH with Aliphatic and Aromatic Isocyanates. J Phys Chem A 2022; 126:9333-9352. [DOI: 10.1021/acs.jpca.2c06011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Oliver Welz
- BASF SE, Scientific Modelling − Quantum Chemistry, Group Research, Carl-Bosch-Straße 38, Ludwigshafen am Rhein67056, Germany
| | - Mark Pfeifle
- BASF SE, Scientific Modelling − Quantum Chemistry, Group Research, Carl-Bosch-Straße 38, Ludwigshafen am Rhein67056, Germany
| | - Patrick M. Plehiers
- International Isocyanate Institute Inc. (III), 333 Route 46 West, Suite. 206, Mountain Lakes, New Jersey07046, United States
| | - Rebecca Sure
- BASF SE, Scientific Modelling − Quantum Chemistry, Group Research, Carl-Bosch-Straße 38, Ludwigshafen am Rhein67056, Germany
| | - Peter Deglmann
- BASF SE, Scientific Modelling − Quantum Chemistry, Group Research, Carl-Bosch-Straße 38, Ludwigshafen am Rhein67056, Germany
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4
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Caster KL, Lee J, Donnellan Z, Selby TM, Osborn DL, Goulay F. Formation of a Resonance-Stabilized Radical Intermediate by Hydroxyl Radical Addition to Cyclopentadiene. J Phys Chem A 2022; 126:9031-9041. [DOI: 10.1021/acs.jpca.2c06934] [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]
Affiliation(s)
- Kacee L. Caster
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26506, United States
| | - James Lee
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26506, United States
| | - Zachery Donnellan
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26506, United States
| | - Talitha M. Selby
- Department of Mathematics and Natural Sciences, University of Wisconsin-Milwaukee, West Bend, Wisconsin53095, United States
| | - David L. Osborn
- Combustion Research Facility, Sandia National Laboratories, Mail Stop 9055, Livermore, California94551, United States
- Department of Chemical Engineering, University of California, Davis, Davis, California95616, United States
| | - Fabien Goulay
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26506, United States
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5
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Giri BR, V.-T. Mai T, Assali M, Nguyen TTD, Nguyen H, Szőri M, Huynh LK, Fittschen C, Farooq A. Reaction Kinetics of 1,4-Cyclohexadiene with OH radicals : An Experimental and Theoretical Study. Phys Chem Chem Phys 2022; 24:7836-7847. [DOI: 10.1039/d1cp04964j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work presents OH-initiated oxidation kinetics of 1,4-cyclochexadiene (1,4-CHD). Temperature dependence of the reaction was investigated by utilizing laser flash photolysis flow reactor and laser-induced fluorescence (LPFR/LIF) technique over the...
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6
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Kuo MT, Yang JN, Lin JJM, Takahashi K. Substituent Effect in the Reactions between Criegee Intermediates and 3-Aminopropanol. J Phys Chem A 2021; 125:6580-6590. [PMID: 34314585 DOI: 10.1021/acs.jpca.1c03737] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Via intramolecular H atom transfer, 3-aminopropanol is more reactive toward Criegee intermediates, in comparison with amines or alcohols. Here we accessed the substituent effect of Criegee intermediates in their reactions with 3-aminopropanol. Through real-time monitoring the concentrations of two Criegee intermediates with their strong UV absorption at 340 nm, the experimental rate coefficients at 298 K (100-300 Torr) were determined to be (1.52 ± 0.08) × 10-11 and (1.44 ± 0.22) × 10-13 cm3 s-1 for the reactions of 3-aminopropanol with (CH3)2COO (acetone oxide) and CH2CHC(CH3)OO (methyl vinyl ketone oxide), respectively. Compared to our previous experimental value for the reaction with syn-CH3CHOO, (1.24 ± 0.13) × 10-11 cm3 s-1, we can see that the methyl substitution at the anti position has little effect on the reactivity while the vinyl substitution causes a drastic decrease in the reactivity. Our theoretical calculations based on CCSD(T)-F12 energies reproduce this 2-order-of-magnitude decrease in the rate coefficient caused by the vinyl substitution. Using the activation strain model, we found that the interaction of Criegee intermediates with 3-aminopropanol is weaker for the case of vinyl substitution. This effect can be further rationalized by the delocalization of the lowest unoccupied molecular orbital for the vinyl-substituted Criegee intermediates. These results would help us better estimate the impact of similar reactions like the reactions of Criegee intermediates with water vapor, some of which could be difficult to measure experimentally but can be important in the atmosphere. We also found that the B2PLYP-D3BJ/aug-cc-pVTZ calculation can reproduce the CCSD(T)-F12 reaction barrier energies within ca. 1 kcal mol-1, indicating that the use of the B2PLYP-D3BJ method is promising for future predictions of the reactions of larger Criegee intermediates.
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Affiliation(s)
- Mei-Tsan Kuo
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Jie-Ning Yang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.,Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Jim Jr-Min Lin
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.,Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Kaito Takahashi
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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7
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Ma F, Guo X, Xia D, Xie HB, Wang Y, Elm J, Chen J, Niu J. Atmospheric Chemistry of Allylic Radicals from Isoprene: A Successive Cyclization-Driven Autoxidation Mechanism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:4399-4409. [PMID: 33769798 DOI: 10.1021/acs.est.0c07925] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The atmospheric chemistry of isoprene has broad implications for regional air quality and the global climate. Allylic radicals, taking 13-17% yield in the isoprene oxidation by •Cl, can contribute as much as 3.6-4.9% to all possible formed intermediates in local regions at daytime. Considering the large quantity of isoprene emission, the chemistry of the allylic radicals is therefore highly desirable. Here, we investigated the atmospheric oxidation mechanism of the allylic radicals using quantum chemical calculations and kinetics modeling. The results indicate that the allylic radicals can barrierlessly combine with O2 to form peroxy radicals (RO2•). Under ≤100 ppt NO and ≤50 ppt HO2• conditions, the formed RO2• mainly undergo two times "successive cyclization and O2 addition" to finally form the product fragments 2-alkoxy-acetaldehyde (C2H3O2•) and 3-hydroperoxy-2-oxopropanal (C3H4O4). The presented reaction illustrates a novel successive cyclization-driven autoxidation mechanism. The formed 3-hydroperoxy-2-oxopropanal product is a new isomer of the atmospheric C3H4O4 family and a potential aqueous-phase secondary organic aerosol precursor. Under >100 ppt NO condition, NO can mediate the cyclization-driven autoxidation process to form C5H7NO3, C5H7NO7, and alkoxy radical-related products. The proposed novel autoxidation mechanism advances our current understanding of the atmospheric chemistry of both isoprene and RO2•.
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Affiliation(s)
- Fangfang Ma
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian University of Technology, Dalian 116024, China
- Department of Atmospheric Sciences, Texas A&M University, College Station, Texas 77843, United States
| | - Xirui Guo
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian University of Technology, Dalian 116024, China
| | - Deming Xia
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian University of Technology, Dalian 116024, China
| | - Hong-Bin Xie
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian University of Technology, Dalian 116024, China
| | - Yonghong Wang
- Institute for Atmospheric and Earth System Research, Faculty of Science, University of Helsinki, Helsinki 00014, Finland
| | - Jonas Elm
- Department of Chemistry and iClimate, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian University of Technology, Dalian 116024, China
| | - Junfeng Niu
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
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8
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Theoretical study of the hydrogen abstraction reactions from substituted phenolic species. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2020.113120] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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9
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Mai TVT, Nguyen HT, Huynh LK. Ab initio kinetic mechanism of OH-initiated atmospheric oxidation of pyrrole. CHEMOSPHERE 2021; 263:127850. [PMID: 32818845 DOI: 10.1016/j.chemosphere.2020.127850] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 07/14/2020] [Accepted: 07/19/2020] [Indexed: 06/11/2023]
Abstract
The comprehensive kinetic mechanism of the OH-initiated gas-phase oxidation of pyrrole is first theoretically reported in a broad range of conditions (T = 200-2000 K &P = 1-7600 Torr). On the potential energy surface constructed at the M06-2X/aug-cc-pVTZ level, the temperature- and pressure-dependent behaviors of the title reaction were characterized using the stochastic Rice-Ramsperger-Kassel-Marcus based Master Equation (RRKM-ME) rate model. The corrections of the hindered internal rotation and quantum tunneling treatments were included. The calculated results reveal the competition between the two distinct pathways: OH-addition and direct H-abstraction. The former channels are found favorable at low-temperature and high-pressure range (e.g., T < 900 K and P = 760 Torr) where non-Arrhenius and positive pressure-dependent behaviors of the rate constants are noticeably observed, while the latter predominate at temperatures higher than 900 K at atmospheric pressure and no pressure dependence on the rate constant is found. The predicted global rate constants are in excellent agreement with laboratory values; thus, the derived kinetic parameters are recommended for modeling/simulation of N-heterocycle-related applications in atmospheric and even in combustion conditions. Besides, pyrrole should not be considered as a persistent organic pollutant owing to its short atmospheric lifetime (∼1 h) towards OH radicals. The secondary mechanisms of the subsequent reactions of two OH-pyrrole adducts (namely, I1 and I2) with two abundant species, O2/NO, which are relevant to the atmospheric degradation process, were also investigated. It is also revealed by TD-DFT calculations that two OH-pyrrole adducts (I1 &I2), nine intermediates, Ii (i = 3-11) and four products (P1, P2, P3 and P6) can undergo photodissociation under the sunlight.
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Affiliation(s)
- Tam V-T Mai
- Molecular Science and Nano-Materials Lab, Institute for Computational Science and Technology, SBI Building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City, Viet Nam; University of Science, 227 Nguyen Van Cu, Ward 4, District 5, Ho Chi Minh City, Viet Nam; Vietnam National University, Ho Chi Minh, Viet Nam.
| | - Hieu T Nguyen
- Molecular Science and Nano-Materials Lab, Institute for Computational Science and Technology, SBI Building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City, Viet Nam.
| | - Lam K Huynh
- Vietnam National University, Ho Chi Minh, Viet Nam; International University, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam.
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10
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Lee J, Caster K, Maddaleno T, Donnellan Z, Selby TM, Goulay F. Kinetic study of the CN radical reaction with 2‐methylfuran. INT J CHEM KINET 2020. [DOI: 10.1002/kin.21403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- James Lee
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown West Virginia
| | - Kacee Caster
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown West Virginia
| | - Trey Maddaleno
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown West Virginia
| | - Zachery Donnellan
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown West Virginia
| | - Talitha M. Selby
- Department of Mathematics and Natural Sciences University of Wisconsin‐Milwaukee West Bend Wisconsin
| | - Fabien Goulay
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown West Virginia
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11
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Chow R, Mok DKW. A theoretical study of the addition of CH 2OO to hydroxymethyl hydroperoxide and its implications on SO 3 formation in the atmosphere. Phys Chem Chem Phys 2020; 22:14130-14141. [PMID: 32542295 DOI: 10.1039/d0cp00961j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of hydroxymethyl hydroperoxide (HMHP, HOCH2OOH) with the simplest Criegee intermediate, CH2OO, has been examined using quantum chemical methods with transition state theory. Geometry optimization and IRC calculations were performed using the M06-2X, MN15-L, and B2PLYP-D3 functionals in conjunction with the aug-cc-pVTZ basis set. Single point energy calculations using QCISD(T) and BD(T) with the same basis set have been performed to determine the energy of reactants, reactive complexes, transition states, and products. Rate coefficients have been obtained using variational transition state theory. The addition of CH2OO on the three different oxygen atoms in HMHP has been considered and the ether oxide forming channel, CH2OO + HOCH2OOH → HOCH2O(O)CH2OOH (channel 2), is the most favorable. The best computed standard enthalpy of reaction (ΔH) and zero-point corrected barrier height are -20.02 and -6.33 kcal mol-1, respectively. The reaction barrier is negative and our results suggest that both the inner and outer transition states contribute to the corresponding overall reactive flux in the tropospheric temperature range (220 K to 320 K). A two-transition state model has been used to obtain reliable rate coefficients at the high-pressure limit. The pressure-dependent rate coefficient calculations using the SS-QRRK theory have shown that this channel is pressure-dependent. Moreover, our investigation has shown that the ether oxide formed may rapidly react with SO2 at 298 K to form SO3, which can, in turn, react with water to form atmospheric H2SO4. A similar calculation has been conducted for the reaction of HMHP with OH, suggesting that the titled reaction may be a significant sink of HMHP. Therefore, the reaction between CH2OO and HOCH2OOH could be an indirect source for generating atmospheric H2SO4, which is crucial to the formation of clouds, and it might relieve global warming.
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Affiliation(s)
- Ronald Chow
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong.
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12
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Xiao F, Sun X, Li Z, Li X. Theoretical Study of Radical-Molecule Reactions with Negative Activation Energies in Combustion: Hydroxyl Radical Addition to Alkenes. ACS OMEGA 2020; 5:12777-12788. [PMID: 32548462 PMCID: PMC7288374 DOI: 10.1021/acsomega.0c00400] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
Many of the radical-molecule reactions are nonelementary reactions with negative activation energies, which usually proceed through two steps. They exist extensively in the atmospheric chemistry and hydrocarbon fuel combustion, so they are extensively studied both theoretically and experimentally. At the same time, various models, such as a two transition state model, a steady-state model, an equilibrium-state model, and a direct elementary dynamics model are proposed to get the kinetic parameters for the overall reaction. In this paper, a conversion temperature T C1 is defined as the temperature at which the standard molar Gibbs free energy change of the formation of the reaction complex is equal to zero, and it is found that when T ≫ T C1, the direct elementary dynamics model with an inclusion of the tunneling correction of the second step reaction is applicable to calculate the overall reaction rate constants for this kind of reaction system. The reaction class of hydroxyl radical addition to alkenes is chosen as the objects of this study, five reactions are chosen as the representative for the reaction class, and their single-point energies are calculated using the method of CCSD(T)/CBS, and it is shown that the highest conversion temperature for the five reactions is 139.89 K, far below the usual initial low-temperature (550 K) oxidation chemistry of hydrocarbon fuels; therefore, the steady-state approximation method is applicable. All geometry optimizations are performed at the BH&HLYP/6-311+G(d,p) level, and the result shows that the geometric parameters in the reaction centers are conserved; hence, the isodesmic reaction method is applicable to this reaction class. To validate the accuracy of this scheme, a comparison of electronic energy difference at the BH&HLYP/6-311+G(d,p) level and the corrected electronic energy difference with the electronic energy difference at the CCSD(T)/CBS level is performed for the five representative reactions, and it is shown that the maximum absolute deviation of electronic energy difference can be reduced from 2.54 kcal·mol-1 before correction to 0.58 kcal·mol-1 after correction, indicating that the isodesmic reaction method is applicable for the accurate calculation of the kinetic parameters for large-size molecular systems with a negative activation energy reaction. The overall rate constants for 44 reactions of the reaction class of hydroxyl radical addition to alkenes are calculated using the transition-state theory in combination with the isodesmic correction scheme, and high-pressure limit rate rules for the reaction class are developed. In addition, the thermodynamic parameter is calculated and the results indicate that our dynamics model is applicable for our studied reaction class. A chemical kinetic modeling and sensitivity analysis using the calculated kinetic data is performed for the combustion of ethene, and the results indicate the studied reaction is important for the low-to-medium temperature combustion modeling of ethene.
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Affiliation(s)
- FengXia Xiao
- College
of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - XiaoHui Sun
- College
of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - ZeRong Li
- College
of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - XiangYuan Li
- College
of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
- Engineering
Research Center of Combustion and Cooling for Aerospace Power, Ministry
of Education, Sichuan University, Chengdu, Sichuan 610065, P. R. China
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13
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Dobulis MA, Thompson MC, Patros KM, Sommerfeld T, Jarrold CC. Emerging Nonvalence Anion States of [Isoprene-H·]·H 2O Accessed via Detachment of OH -·Isoprene. J Phys Chem A 2020; 124:2279-2287. [PMID: 32091900 DOI: 10.1021/acs.jpca.0c01250] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The anion photoelectron imaging spectra of an ion with m/z 85, generated under ion source conditions that optimize •OH production in a coexpansion with isoprene, are presented and analyzed with supporting calculations. A spectroscopic feature observed at a vertical electron detachment energy of 2.45 eV, which dominates the photoelectron spectrum measured at 3.495 eV photon energy, is consistent with the OH-·isoprene ion-molecule complex, while additional signal observed at lower electron binding energy can be attributed to other constitutional isomers. However, spectra measured over a 2.2-2.6 eV photon energy range, i.e., from near threshold of the predominant OH-·isoprene detachment feature through the vertical detachment energy, exhibit sharp features with common electron kinetic energies, suggesting autodetachment from a temporary anion prepared by photoexcitation. The photon energy independence of the electron kinetic energy of these features along with the low dipole moment predicted for the neutral •OH·isoprene van der Waals complex, suggest a complex photon-driven process. We present calculations supporting a hypothesis that near-threshold production of the •OH···isoprene reactive complex results in hydrogen abstraction of the isoprene molecule. The newly formed activated complex anion supports a dipole bound state that temporarily traps the near zero-kinetic energy electron and then autodetaches, encoding the low-frequency modes of the dehydrogenated neutral isoprene radical in the electron kinetic energies.
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Affiliation(s)
- Marissa A Dobulis
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Michael C Thompson
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Kellyn M Patros
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Thomas Sommerfeld
- Department of Chemistry and Physics, Southeast Louisiana University, SLU 10878, Hammond, Louisiana 70402, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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14
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Chemical Kinetics of Hydrogen Atom Abstraction from Propargyl Sites by Hydrogen and Hydroxy Radicals. Int J Mol Sci 2019; 20:ijms20133227. [PMID: 31262079 PMCID: PMC6650822 DOI: 10.3390/ijms20133227] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 06/26/2019] [Accepted: 06/27/2019] [Indexed: 01/02/2023] Open
Abstract
Hydrogen atom abstraction from propargyl C-H sites of alkynes plays a critical role in determining the reactivity of alkyne molecules and understanding the formation of soot precursors. This work reports a systematic theoretical study on the reaction mechanisms and rate constants for hydrogen abstraction reactions by hydrogen and hydroxy radicals from a series of alkyne molecules with different structural propargyl C-H atoms. Geometry optimizations and frequency calculations for all species are performed at M06-2X/cc-pVTZ level of theory and the hindered internal rotations are also treated at this level. The high-level W1BD and CCSD(T)/CBS theoretical calculations are used as a benchmark for a series of DFT calculations toward the selection of accurate DFT functionals for large reaction systems in this work. Based on the quantum chemistry calculations, rate constants are computed using the canonical transition state theory with tunneling correction and the treatment of internal rotations. The effects of the structure and reaction site on the energy barriers and rate constants are examined systematically. To the best of our knowledge, this work provides the first systematic study for one of the key initiation abstraction reactions for compounds containing propargyl hydrogen atoms.
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15
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Lam KT, Wilhelmsen CJ, Dibble TS. BrHgO• + C2H4 and BrHgO• + HCHO in Atmospheric Oxidation of Mercury: Determining Rate Constants of Reactions with Prereactive Complexes and Bifurcation. J Phys Chem A 2019; 123:6045-6055. [DOI: 10.1021/acs.jpca.9b05120] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Khoa T. Lam
- Department of Chemistry, State University of New York-College of Environmental Science and Forestry, 1 Forestry Dr., Syracuse, New York 13210, United States
| | - Curtis J. Wilhelmsen
- Department of Chemistry, State University of New York-College of Environmental Science and Forestry, 1 Forestry Dr., Syracuse, New York 13210, United States
| | - Theodore S. Dibble
- Department of Chemistry, State University of New York-College of Environmental Science and Forestry, 1 Forestry Dr., Syracuse, New York 13210, United States
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16
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Khaled F, Giri BR, Liu D, Assaf E, Fittschen C, Farooq A. Insights into the Reactions of Hydroxyl Radical with Diolefins from Atmospheric to Combustion Environments. J Phys Chem A 2019; 123:2261-2271. [PMID: 30768904 DOI: 10.1021/acs.jpca.8b10997] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydroxyl radicals and olefins are quite important from a combustion and an atmospheric chemistry standpoint. Large amounts of olefinic compounds are emitted into the earth's atmosphere from both biogenic and anthropogenic sources. Olefins make a significant share in transportation fuels (e.g., up to 20% by volume in gasoline), and they appear as important intermediates during hydrocarbon oxidation. As olefins inhibit low-temperature heat release, they have caught some attention for their applicability in future advanced combustion engine technology. Despite their importance, the literature data for the reactions of olefins are quite scarce. In this work, we have measured the rate coefficients for the reaction of hydroxyl radicals (OH) with several diolefins, namely 1,3-butadiene, cis-1,3-pentadiene, trans-1,3-pentadiene, and 1,4-pentadiene, over a wide range of experimental conditions ( T = 294-468 K and p ∼ 53 mbar; T = 881-1348 K and p ∼ 1-2.5 bar). We obtained the low- T data in a flow reactor using laser flash photolysis and laser-induced fluorescence (LPFR/LIF), and the high- T data were obtained with a shock tube and UV laser-absorption (ST/LA). At low temperatures, we observed differences in the reactivity of cis- and trans-1,3-pentadiene, but these molecules exhibited similar reactivity at high temperatures. Similar to monoolefins + OH reactions, we observed negative temperature dependence for dienes + OH reactions at low temperatures-revealing that OH-addition channels prevail at low temperatures. Except for the 1,4-pentadiene + OH reaction, which shows evidence of significant H-abstraction reactions even at low-temperatures, other diolefins studied here almost exclusively undergo addition reaction with OH radicals at the low-temperature end of our experiments; whereas the reactions mainly switch to hydrogen abstraction at high temperatures. These reactions show complex Arrhenius behavior as a result of many possible chemical pathways in such a convoluted system.
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Affiliation(s)
- Fethi Khaled
- Clean Combustion Research Center, Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
| | - Binod Raj Giri
- Clean Combustion Research Center, Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
| | - Dapeng Liu
- Clean Combustion Research Center, Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
| | - Emmanuel Assaf
- CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère , Universite' Lille , F-59000 Lille , France
| | - Christa Fittschen
- CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l'Atmosphère , Universite' Lille , F-59000 Lille , France
| | - Aamir Farooq
- Clean Combustion Research Center, Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
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17
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Tu Y, Wang JB, Li XY. Theoretical study of hydrogen abstraction by small radicals from cyclohexane-carbonyl-hydroperoxide. Theor Chem Acc 2019. [DOI: 10.1007/s00214-019-2426-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Asatryan R, Pal Y, Hachmann J, Ruckenstein E. Roaming-like Mechanism for Dehydration of Diol Radicals. J Phys Chem A 2018; 122:9738-9754. [DOI: 10.1021/acs.jpca.8b08690] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rubik Asatryan
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Yudhajit Pal
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
- Computational and Data-Enabled Science and Engineering Graduate Program, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Johannes Hachmann
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
- New York State Center of Excellence in Materials Informatics, Buffalo, New York 14203, United States
- Computational and Data-Enabled Science and Engineering Graduate Program, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Eli Ruckenstein
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
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19
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Wang L, Wang L. Atmospheric Oxidation Mechanism of Sabinene Initiated by the Hydroxyl Radicals. J Phys Chem A 2018; 122:8783-8793. [PMID: 30351098 DOI: 10.1021/acs.jpca.8b06381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The atmospheric oxidation mechanism of sabinene initiated by the OH radical has been studied using quantum chemistry calculations at the CBS-QB3 level and reaction kinetic calculations using transition state theory and unimolecular rate theory coupled with collisional energy transfer. The oxidation is initiated by OH radical additions to the CH2═C< bond with a branching ratio of ∼(92-96)%, while all the hydrogen atom abstractions count for ∼(4-8)% of branching ratio, which was estimated by comparing the rate coefficients of the reactions of sabinene and sabinaketon with the OH radical. Addition of OH to the ═C< carbon forms radical adduct Ra, while addition of OH to the terminal CH2═ carbon forms radical adduct Rb, which would break the three-membered ring promptly and almost completely to radical Re. RRKM-ME calculations obtained fractional yields of 0.40, 0.09, and 0.51 for radicals syn-Ra, anti-Ra, and Re, respectively, at 298 K and 760 Torr. In the atmosphere, the syn/ anti-Ra radical would ultimately transform to sabinaketone in the presence of ppbv levels of NO, while in the transformation of the Re radical, both bimolecular reactions and unimolecular H-migrations could occur competitively for the peroxy radicals formed. The H-migrations in peroxy radicals result in the formation of unsaturated multifunctional compounds containing >C═O, -OH, and/or -OOH groups. Formation of sabinaketone from syn- and anti-Ra and formation of acetone from Re are predicted with yields of ∼0.37 and ∼0.38 in the presence of high NO, being larger than while in reasonable agreement with the experimental values of 0.19-0.23 and of 0.21-0.27, respectively.
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Affiliation(s)
- Lingyu Wang
- School of Chemistry & Chemical Engineering , South China University of Technology , 381 Wushan Road , Guangzhou , China 510640
| | - Liming Wang
- School of Chemistry & Chemical Engineering , South China University of Technology , 381 Wushan Road , Guangzhou , China 510640.,Guangdong Provincial Laboratory of Atmospheric Environment and Pollution Control , South China University of Technology , Guangzhou , China 510006
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20
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Medeiros DJ, Blitz MA, James L, Speak TH, Seakins PW. Kinetics of the Reaction of OH with Isoprene over a Wide Range of Temperature and Pressure Including Direct Observation of Equilibrium with the OH Adducts. J Phys Chem A 2018; 122:7239-7255. [DOI: 10.1021/acs.jpca.8b04829] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. J. Medeiros
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, U.K
| | - M. A. Blitz
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, U.K
- National Centre for Atmospheric Science, University of Leeds, Leeds, LS2 9JT, U.K
| | - L. James
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, U.K
| | - T. H. Speak
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, U.K
| | - P. W. Seakins
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, U.K
- National Centre for Atmospheric Science, University of Leeds, Leeds, LS2 9JT, U.K
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21
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Wennberg PO, Bates KH, Crounse JD, Dodson LG, McVay RC, Mertens LA, Nguyen TB, Praske E, Schwantes RH, Smarte MD, St Clair JM, Teng AP, Zhang X, Seinfeld JH. Gas-Phase Reactions of Isoprene and Its Major Oxidation Products. Chem Rev 2018. [PMID: 29522327 DOI: 10.1021/acs.chemrev.7b00439] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Isoprene carries approximately half of the flux of non-methane volatile organic carbon emitted to the atmosphere by the biosphere. Accurate representation of its oxidation rate and products is essential for quantifying its influence on the abundance of the hydroxyl radical (OH), nitrogen oxide free radicals (NO x), ozone (O3), and, via the formation of highly oxygenated compounds, aerosol. We present a review of recent laboratory and theoretical studies of the oxidation pathways of isoprene initiated by addition of OH, O3, the nitrate radical (NO3), and the chlorine atom. From this review, a recommendation for a nearly complete gas-phase oxidation mechanism of isoprene and its major products is developed. The mechanism is compiled with the aims of providing an accurate representation of the flow of carbon while allowing quantification of the impact of isoprene emissions on HO x and NO x free radical concentrations and of the yields of products known to be involved in condensed-phase processes. Finally, a simplified (reduced) mechanism is developed for use in chemical transport models that retains the essential chemistry required to accurately simulate isoprene oxidation under conditions where it occurs in the atmosphere-above forested regions remote from large NO x emissions.
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22
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Franke PR, Douberly GE. Rotamers of Isoprene: Infrared Spectroscopy in Helium Droplets and Ab Initio Thermochemistry. J Phys Chem A 2017; 122:148-158. [DOI: 10.1021/acs.jpca.7b10260] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter R. Franke
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556, United States
| | - Gary E. Douberly
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556, United States
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23
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Winter PM, Rheaume M, Cooksy AL. RRKM and master equation kinetic analysis of parallel addition reactions of isomeric radical intermediates in hydrocarbon flames. J Chem Phys 2017; 147:054306. [DOI: 10.1063/1.4996557] [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)
- Pierre M. Winter
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182-1030, USA
| | - Michael Rheaume
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182-1030, USA
| | - Andrew L. Cooksy
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182-1030, USA
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24
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Affiliation(s)
- Jihye Jeon
- Department of Chemistry; Korea National University of Education; Cheongju Chungbuk 28175 Republic of Korea
| | - John Roger Barker
- Department of Climate and Space Sciences and Engineering; University of Michigan; Ann Arbor MI 48109 USA
| | - Kihyung Song
- Department of Chemistry; Korea National University of Education; Cheongju Chungbuk 28175 Republic of Korea
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25
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Yang F, Deng F, Pan Y, Zhang Y, Tang C, Huang Z. Kinetics of Hydrogen Abstraction and Addition Reactions of 3-Hexene by ȮH Radicals. J Phys Chem A 2017; 121:1877-1889. [DOI: 10.1021/acs.jpca.6b11499] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Feiyu Yang
- State Key Laboratory
of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
| | - Fuquan Deng
- State Key Laboratory
of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
| | - Youshun Pan
- State Key Laboratory
of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
| | - Yingjia Zhang
- State Key Laboratory
of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
| | - Chenglong Tang
- State Key Laboratory
of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
| | - Zuohua Huang
- State Key Laboratory
of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
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26
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Shi R, Liu F. Quantum chemical study on the stability of honeybee queen pheromone against atmospheric factors. J Mol Model 2016; 22:140. [PMID: 27207255 DOI: 10.1007/s00894-016-2993-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/24/2016] [Indexed: 11/26/2022]
Abstract
The managed honeybee, Apis mellifera, has been experienced a puzzling event, termed as colony collapse disorder (CCD), in which worker bees abruptly disappear from their hives. Potential factors include parasites, pesticides, malnutrition, and environmental stresses. However, so far, no definitive relationship has been established between specific causal factors and CCD events. Here we theoretically test whether atmospheric environment could disturb the chemical communication between the queen and their workers in a colony. A quantum chemistry method has been used to investigate for the stability of the component of A. mellifera queen mandibular pheromone (QMP), (E)-9-keto-2-decenoic acid (9-ODA), against atmospheric water and free radicals. The results show that 9-ODA is less likely to react with water due to the high barrier heights (~36.5 kcal · mol(-1)) and very low reaction rates. However, it can easily react with triplet oxygen and hydroxyl radicals because of low or negative energy barriers. Thus, the atmospheric free radicals may disturb the chemical communication between the queen and their daughters in a colony. Our pilot study provides new insight for the cause of CCD, which has been reported throughout the world.
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Affiliation(s)
- Rongwei Shi
- Institute of Technical Biology & Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 350 Shushanhu Rd., Hefei, 230031, Anhui, China.
| | - Fanglin Liu
- Institute of Technical Biology & Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 350 Shushanhu Rd., Hefei, 230031, Anhui, China
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27
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Elsamra RMI, Jalan A, Buras ZJ, Middaugh JE, Green WH. Temperature- and Pressure-Dependent Kinetics of CH2OO + CH3COCH3and CH2OO + CH3CHO: Direct Measurements and Theoretical Analysis. INT J CHEM KINET 2016. [DOI: 10.1002/kin.21007] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rehab M. I. Elsamra
- Department of Chemical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139
- Department of Chemistry; Faculty of Science; Alexandria University; Ibrahimia 21321 Alexandria Egypt
| | - Amrit Jalan
- Department of Chemical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139
| | - Zachary J. Buras
- Department of Chemical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139
| | - Joshua E. Middaugh
- Department of Chemical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139
| | - William H. Green
- Department of Chemical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139
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28
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Chow R, Mok DKW, Lee EPF, Dyke JM. A theoretical study of the atmospherically important radical–radical reaction BrO + HO2; the product channel O2(a1Δg) + HOBr is formed with the highest rate. Phys Chem Chem Phys 2016; 18:30554-30569. [DOI: 10.1039/c6cp05877a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theoretical study has been made of the BrO + HO2 reaction, a radical–radical reaction which contributes to ozone depletion in the atmosphere via production of HOBr.
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Affiliation(s)
- Ronald Chow
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- China
| | - Daniel K. W. Mok
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- China
| | - Edmond P. F. Lee
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- Hung Hom
- China
- School of Chemistry
| | - John M. Dyke
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
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29
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Kuwata KT, Guinn EJ, Hermes MR, Fernandez JA, Mathison JM, Huang K. A Computational Re-examination of the Criegee Intermediate–Sulfur Dioxide Reaction. J Phys Chem A 2015; 119:10316-35. [DOI: 10.1021/acs.jpca.5b06565] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keith T. Kuwata
- Department of Chemistry, Macalester College, Saint Paul, Minnesota 55105-1899, United States
| | - Emily J. Guinn
- Department of Chemistry, Macalester College, Saint Paul, Minnesota 55105-1899, United States
| | - Matthew R. Hermes
- Department of Chemistry, Macalester College, Saint Paul, Minnesota 55105-1899, United States
| | - Jenna A. Fernandez
- Department of Chemistry, Macalester College, Saint Paul, Minnesota 55105-1899, United States
| | - Jon M. Mathison
- Department of Chemistry, Macalester College, Saint Paul, Minnesota 55105-1899, United States
| | - Ke Huang
- Department of Chemistry, Macalester College, Saint Paul, Minnesota 55105-1899, United States
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30
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Gai Y, Lin X, Ma Q, Hu C, Gu X, Zhao W, Fang B, Zhang W, Long B, Long Z. Experimental and Theoretical Study of Reactions of OH Radicals with Hexenols: An Evaluation of the Relative Importance of the H-Abstraction Reaction Channel. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:10380-10388. [PMID: 26274814 DOI: 10.1021/acs.est.5b01682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
C6 hexenols are one of the most significant groups of volatile organic compounds with biogenic emissions. The lack of corresponding kinetic parameters and product information on their oxidation reactions will result in incomplete atmospheric chemical mechanisms and models. In this paper, experimental and theoretical studies are reported for the reactions of OH radicals with a series of C6 hexenols, (Z)-2-hexen-1-ol, (Z)-3-hexen-1-ol, (Z)-4-hexen-1-ol, (E)-2-hexen-1-ol, (E)-3-hexen-1-ol, and (E)-4-hexen-1-ol, at 298 K and 1.01 × 10(5) Pa. The corresponding rate constants were 8.53 ± 1.36, 10.1 ± 1.6, 7.86 ± 1.30, 8.08 ± 1.33, 9.10 ± 1.50, and 7.14 ± 1.20 (in units of 10(-11) cm(3) molecule(-1) s(-1)), respectively, measured by gas chromatography with a flame ionization detector (GC-FID), using a relative technique. Theoretical calculations concerning the OH-addition and H-abstraction reaction channels were also performed for these reactions to further understand the reaction mechanism and the relative importance of the H-abstraction reaction. By contrast to previously reported results, the H-abstraction channel is a non-negligible reaction channel for reactions of OH radicals with these hexenols. The rate constants of the H-abstraction channel are comparable with those for the OH-addition channel and contribute >20% for most of the studied alcohols, even >50% for (E)-3-hexen-1-ol. Thus, H-abstraction channels may have an important role in the reactions of these alcohols with OH radicals and must be considered in certain atmospheric chemical mechanisms and models.
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Affiliation(s)
| | | | | | | | | | | | | | - Weijun Zhang
- School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China , Hefei 230026, Anhui, China
| | | | - Zhengwen Long
- Department of Physics, Guizhou University , Guiyang 550025, China
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31
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Antonov IO, Kwok J, Zádor J, Sheps L. A Combined Experimental and Theoretical Study of the Reaction OH + 2-Butene in the 400–800 K Temperature Range. J Phys Chem A 2015; 119:7742-52. [DOI: 10.1021/acs.jpca.5b01012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ivan O. Antonov
- Combustion
Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California 94551-0969, United States
| | - Justin Kwok
- Combustion
Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California 94551-0969, United States
| | - Judit Zádor
- Combustion
Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California 94551-0969, United States
| | - Leonid Sheps
- Combustion
Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California 94551-0969, United States
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32
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Vereecken L, Glowacki DR, Pilling MJ. Theoretical Chemical Kinetics in Tropospheric Chemistry: Methodologies and Applications. Chem Rev 2015; 115:4063-114. [DOI: 10.1021/cr500488p] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Luc Vereecken
- Max Planck Institute for Chemistry, 55128 Mainz, Germany
| | - David R. Glowacki
- PULSE
Institute and Department of Chemistry, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- School
of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
- Department
of Computer Science, University of Bristol, Bristol BS8 1UB, United Kingdom
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33
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Troy TP, Tayebjee MJ, Nauta K, Kable SH, Schmidt TW. Atmospheric oxidation intermediates: Laser spectroscopy of resonance-stabilized radicals from p-cymene. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2014.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Caravan RL, Shannon RJ, Lewis T, Blitz MA, Heard DE. Measurements of Rate Coefficients for Reactions of OH with Ethanol and Propan-2-ol at Very Low Temperatures. J Phys Chem A 2014; 119:7130-7. [DOI: 10.1021/jp505790m] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Thomas Lewis
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - Mark A. Blitz
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - Dwayne E. Heard
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
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35
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Ballard N, Rusconi S, Akhmatskaya E, Sokolovski D, de la Cal JC, Asua JM. Impact of Competitive Processes on Controlled Radical Polymerization. Macromolecules 2014. [DOI: 10.1021/ma501267a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Nicholas Ballard
- POLYMAT
and Grupo de Ingeniería Química, Dpto. de Química
Aplicada, University of the Basque Country UPV/EHU, Joxe Mari Korta
Zentroa, Tolosa Etorbidea 72, 20018 Donostia/San Sebastián, Spain
| | - Simone Rusconi
- Basque
Center
for Applied Mathematics (BCAM), Alameda
de Mazarredo 14, 48009 Bilbao, Spain
| | - Elena Akhmatskaya
- Basque
Center
for Applied Mathematics (BCAM), Alameda
de Mazarredo 14, 48009 Bilbao, Spain
- Ikerbasque, Basque
Foundation for Science, 48011 Bilbao, Spain
| | - Dmitri Sokolovski
- Ikerbasque, Basque
Foundation for Science, 48011 Bilbao, Spain
- Department
of Physical Chemistry, University of the Basque Country UPV/EHU, 48940 Leioa, Spain
| | - José C. de la Cal
- POLYMAT
and Grupo de Ingeniería Química, Dpto. de Química
Aplicada, University of the Basque Country UPV/EHU, Joxe Mari Korta
Zentroa, Tolosa Etorbidea 72, 20018 Donostia/San Sebastián, Spain
| | - José M. Asua
- POLYMAT
and Grupo de Ingeniería Química, Dpto. de Química
Aplicada, University of the Basque Country UPV/EHU, Joxe Mari Korta
Zentroa, Tolosa Etorbidea 72, 20018 Donostia/San Sebastián, Spain
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36
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Peeters J, Müller JF, Stavrakou T, Nguyen VS. Hydroxyl Radical Recycling in Isoprene Oxidation Driven by Hydrogen Bonding and Hydrogen Tunneling: The Upgraded LIM1 Mechanism. J Phys Chem A 2014; 118:8625-43. [DOI: 10.1021/jp5033146] [Citation(s) in RCA: 155] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jozef Peeters
- Department
of Chemistry, University of Leuven, B-3001 Heverlee, Belgium
| | - Jean-François Müller
- Belgian Institute for Space Aeronomy, Avenue Circulaire 3, B-1180 Brussels, Belgium
| | | | - Vinh Son Nguyen
- Department
of Chemistry, University of Leuven, B-3001 Heverlee, Belgium
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37
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Pfeifle M, Olzmann M. Consecutive Chemical Activation Steps in the OH-Initiated Atmospheric Degradation of Isoprene: An Analysis with Coupled Master Equations. INT J CHEM KINET 2014. [DOI: 10.1002/kin.20849] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mark Pfeifle
- Institut für Physikalische Chemie; Karlsruher Institut für Technologie; 76131 Karlsruhe Germany
| | - Matthias Olzmann
- Institut für Physikalische Chemie; Karlsruher Institut für Technologie; 76131 Karlsruhe Germany
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38
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Shannon RJ, Caravan RL, Blitz MA, Heard DE. A combined experimental and theoretical study of reactions between the hydroxyl radical and oxygenated hydrocarbons relevant to astrochemical environments. Phys Chem Chem Phys 2014; 16:3466-78. [DOI: 10.1039/c3cp54664k] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Rate coefficients for the reactions of the hydroxyl radical with acetone and dimethyl ether increase dramatically at very low temperatures.
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Affiliation(s)
| | | | - M. A. Blitz
- School of Chemistry
- University of Leeds
- Leeds, UK
- National Centre for Atmospheric Science
- University of Leeds
| | - D. E. Heard
- School of Chemistry
- University of Leeds
- Leeds, UK
- National Centre for Atmospheric Science
- University of Leeds
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39
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Liljegren JA, Stevens PS. Measurements of the Kinetics of the Reaction of OH Radicals with 3-Methylfuran at Low Pressure. INT J CHEM KINET 2013. [DOI: 10.1002/kin.20814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jennifer A. Liljegren
- School of Public and Environmental Affairs and Department of Chemistry; Indiana University Bloomington IN 47405
| | - Philip S. Stevens
- School of Public and Environmental Affairs and Department of Chemistry; Indiana University Bloomington IN 47405
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40
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Zhang Y, Chao K, Sun J, Su Z, Pan X, Zhang J, Wang R. Theoretical Study on the Gas Phase Reaction of Allyl Alcohol with Hydroxyl Radical. J Phys Chem A 2013; 117:6629-40. [DOI: 10.1021/jp402142b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yunju Zhang
- Institute of Functional Material
Chemistry, Faculty of Chemistry, Northeast Normal University, Renmin Road 5268, Changchun, Jilin 130024, P. R. China
| | - Kai Chao
- Ningxia Entry-Exit Inspection and Quarantine Bureau, Yinchuan, Ningxia
750001, P.R. China
| | - Jingyu Sun
- College
of Chemistry and Environmental
Engineering, Hubei Normal University, Cihu
Road 11, Huanshi, Hubei 435002, P.R. China
| | - Zhongmin Su
- Institute of Functional Material
Chemistry, Faculty of Chemistry, Northeast Normal University, Renmin Road 5268, Changchun, Jilin 130024, P. R. China
| | - Xiumei Pan
- Institute of Functional Material
Chemistry, Faculty of Chemistry, Northeast Normal University, Renmin Road 5268, Changchun, Jilin 130024, P. R. China
| | - Jingping Zhang
- Institute of Functional Material
Chemistry, Faculty of Chemistry, Northeast Normal University, Renmin Road 5268, Changchun, Jilin 130024, P. R. China
| | - Rongshun Wang
- Institute of Functional Material
Chemistry, Faculty of Chemistry, Northeast Normal University, Renmin Road 5268, Changchun, Jilin 130024, P. R. China
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41
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da Silva G. Reaction of Methacrolein with the Hydroxyl Radical in Air: Incorporation of Secondary O2 Addition into the MACR + OH Master Equation. J Phys Chem A 2012; 116:5317-24. [DOI: 10.1021/jp303806w] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gabriel da Silva
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia
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42
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Dillon TJ, Tucceri ME, Dulitz K, Horowitz A, Vereecken L, Crowley JN. Reaction of Hydroxyl Radicals with C4H5N (Pyrrole): Temperature and Pressure Dependent Rate Coefficients. J Phys Chem A 2012; 116:6051-8. [DOI: 10.1021/jp211241x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Terry J. Dillon
- Division of Atmospheric
Chemistry, Max-Planck-Institut für Chemie, 55020 Mainz, Germany
| | - Maria E. Tucceri
- Division of Atmospheric
Chemistry, Max-Planck-Institut für Chemie, 55020 Mainz, Germany
| | - Katrin Dulitz
- Division of Atmospheric
Chemistry, Max-Planck-Institut für Chemie, 55020 Mainz, Germany
| | - Abraham Horowitz
- Division of Atmospheric
Chemistry, Max-Planck-Institut für Chemie, 55020 Mainz, Germany
| | - Luc Vereecken
- Division of Atmospheric
Chemistry, Max-Planck-Institut für Chemie, 55020 Mainz, Germany
| | - John N. Crowley
- Division of Atmospheric
Chemistry, Max-Planck-Institut für Chemie, 55020 Mainz, Germany
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43
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Vereecken L, Peeters J. A theoretical study of the OH-initiated gas-phase oxidation mechanism of β-pinene (C10H16): first generation products. Phys Chem Chem Phys 2012; 14:3802-15. [DOI: 10.1039/c2cp23711c] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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44
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Vereecken L, Francisco JS. Theoretical studies of atmospheric reaction mechanisms in the troposphere. Chem Soc Rev 2012; 41:6259-93. [DOI: 10.1039/c2cs35070j] [Citation(s) in RCA: 311] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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45
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Thomas PS, Miller TA. The A∼– X∼ electronic absorption of cyclopentadienyl peroxy radical (c-C5H5OO): A cavity ringdown spectroscopic and computational study. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.08.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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46
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Zádor J, Klippenstein SJ, Miller JA. Pressure-Dependent OH Yields in Alkene + HO2 Reactions: A Theoretical Study. J Phys Chem A 2011; 115:10218-25. [DOI: 10.1021/jp2059276] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Judit Zádor
- Combustion Research Facility, Sandia National Laboratories, Livermore, California
94551-0969, United States
| | - Stephen J. Klippenstein
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
Argonne, Illinois 60439, United States
| | - James A. Miller
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
Argonne, Illinois 60439, United States
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47
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Daranlot J, Bergeat A, Caralp F, Caubet P, Costes M, Forst W, Loison J, Hickson KM. Gas‐Phase Kinetics of Hydroxyl Radical Reactions with Alkenes: Experiment and Theory. Chemphyschem 2010; 11:4002-10. [DOI: 10.1002/cphc.201000467] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Julien Daranlot
- Université de Bordeaux, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
- CNRS UMR 5255, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
| | - Astrid Bergeat
- Université de Bordeaux, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
- CNRS UMR 5255, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
| | - Françoise Caralp
- Université de Bordeaux, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
- CNRS UMR 5255, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
| | - Philippe Caubet
- Université de Bordeaux, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
- CNRS UMR 5255, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
| | - Michel Costes
- Université de Bordeaux, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
- CNRS UMR 5255, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
| | - Wendell Forst
- Université de Bordeaux, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
- CNRS UMR 5255, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
| | - Jean‐Christophe Loison
- Université de Bordeaux, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
- CNRS UMR 5255, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
| | - Kevin M. Hickson
- Université de Bordeaux, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
- CNRS UMR 5255, Institut des Sciences Moléculaires, 351 Cours de la Libération, 33405 Talence Cedex (France)
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48
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Vasu SS, Zádor J, Davidson DF, Hanson RK, Golden DM, Miller JA. High-Temperature Measurements and a Theoretical Study of the Reaction of OH with 1,3-Butadiene. J Phys Chem A 2010; 114:8312-8. [DOI: 10.1021/jp104880u] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Subith S. Vasu
- Mechanical Engineering Department, Stanford University,
Stanford, California 94305-3032, and Combustion Research Facility,
MS 9055, Sandia National Laboratories, Livermore, California 94551-0969
| | - Judit Zádor
- Mechanical Engineering Department, Stanford University,
Stanford, California 94305-3032, and Combustion Research Facility,
MS 9055, Sandia National Laboratories, Livermore, California 94551-0969
| | - David F. Davidson
- Mechanical Engineering Department, Stanford University,
Stanford, California 94305-3032, and Combustion Research Facility,
MS 9055, Sandia National Laboratories, Livermore, California 94551-0969
| | - Ronald K. Hanson
- Mechanical Engineering Department, Stanford University,
Stanford, California 94305-3032, and Combustion Research Facility,
MS 9055, Sandia National Laboratories, Livermore, California 94551-0969
| | - David M. Golden
- Mechanical Engineering Department, Stanford University,
Stanford, California 94305-3032, and Combustion Research Facility,
MS 9055, Sandia National Laboratories, Livermore, California 94551-0969
| | - James A. Miller
- Mechanical Engineering Department, Stanford University,
Stanford, California 94305-3032, and Combustion Research Facility,
MS 9055, Sandia National Laboratories, Livermore, California 94551-0969
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49
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Ghosh B, Bugarin A, Connell BT, North SW. Isomer-selective study of the OH-initiated oxidation of isoprene in the presence of O(2) and NO: 2. the major OH addition channel. J Phys Chem A 2010; 114:2553-60. [PMID: 20121059 DOI: 10.1021/jp909052t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the first isomeric-selective study of the dominant isomeric pathway in the OH-initiated oxidation of isoprene in the presence of O2 and NO using the laser photolysis-laser induced fluorescence (LP-LIF) technique. The photolysis of monodeuterated/nondeuterated 2-iodo-2-methylbut-3-en-1-ol results exclusively in the dominant OH-isoprene addition product, providing important insight into the oxidation mechanism. On the basis of kinetic analysis of OH cycling experiments, we have determined the rate constant for O2 addition to the hydroxyalkyl radical to be 1.0(-0.5)+1.7 x 10(-12) cm3 s(-1), and we find a value of 8.1-2.3+3.4 x 10(-12) cm3 s(-1) for the overall reaction rate constant of the resulting hydroxyperoxy radical with NO. We also report the first clear experimental evidence of the (E) form of the delta-hydroxyalkoxy channel through isotopic labeling experiments and quantify its branching ratio to be (10 +/- 3)%. This puts a rigorous upper limit on the branching of the (E)-delta-hydroxyalkoxy radical channel. Since our measured isomeric-selective rate constants for the dominant outer channel in OH-initiated isoprene chemistry are similar to the overall rate constants derived from nonisomeric kinetics, we predict that the remaining outer addition channel will have similar reactivity.
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Affiliation(s)
- Buddhadeb Ghosh
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842, USA
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50
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Vega-Rodriguez A, Alvarez-Idaboy JR. Quantum chemistry and TST study of the mechanisms and branching ratios for the reactions of OH with unsaturated aldehydes. Phys Chem Chem Phys 2010; 11:7649-58. [PMID: 19950504 DOI: 10.1039/b906692f] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theoretical study is presented on the mechanism of OH reactions with three unsaturated aldehydes, relevant to atmospheric chemistry. Using acrolein as test molecule, several methods were tested in conjunction with the 6-311 ++ G(d,p) basis set. Based on the results from this study, the MPWB1K and M05-2X functionals were selected for the further study of acrolein, methacrolein and crotonaldehyde. All possible reaction channels have been modeled. Calculated overall rate coefficients at M05-2X/6-311 ++ G(d,p) are in excellent agreement with experimental data, supporting the proposed mechanisms. The previously proposed global mechanisms were confirmed, and specific mechanisms were identified. The causes of the mechanism for crotonaldehyde being different from the one of acrolein and methacrolein were clarified. The agreement between experiment and calculations validates the use of the chosen DFT methods for kinetic calculations, especially for large systems and cases in which spin contamination is an important issue.
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Affiliation(s)
- Aidee Vega-Rodriguez
- Facultad de Quimica, Departamento de Física y Química Teorica, Universidad Nacional Autonoma de Mexico, Mexico, DF, México
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