1
|
Truong DH, Nguyen TLA, Alharzali N, Al Rawas HK, Taamalli S, Ribaucour M, Nguyen HL, El Bakali A, Ngo TC, Černušák I, Louis F, Dao DQ. Theoretical insights into the HO ●-induced oxidation of chlorpyrifos pesticide: Mechanism, kinetics, ecotoxicity, and cholinesterase inhibition of degradants. CHEMOSPHERE 2024; 350:141085. [PMID: 38163466 DOI: 10.1016/j.chemosphere.2023.141085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/28/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
The oxidation of the common pesticide chlorpyrifos (CPF) initiated by HO● radical and the risks of its degradation products were studied in the gaseous and aqueous phases via computational approaches. Oxidation mechanisms were investigated, including H-, Cl-, CH3- abstraction, HO●-addition, and single electron transfer. In both phases, HO●-addition at the C of the pyridyl ring is the most energetically favorable and spontaneous reaction, followed by H-abstraction reactions at methylene groups (i.e., at H19/H21 in the gas phase and H22/H28 in water). In contrast, other abstractions and electron transfer reactions are unfavorable. However, regarding the kinetics, the significant contribution to the oxidation of CPF is made from H-abstraction channels, mostly at the hydrogens of the methylene groups. CPF can be decomposed in a short time (5-8 h) in the gas phase, and it is more persistent in natural water with a lifetime between 24 days and 66 years, depending on the temperature and HO● concentration. Subsequent oxidation of the essential radical products with other oxidizing reagents, i.e., HO●, NO2●, NO●, and 3O2, gave primary neutral products P1-P15. Acute and chronic toxicity calculations estimate very toxic levels for CPF and two degradation products, P7w and P12w, in aquatic systems. The neurotoxicity of these products was investigated by docking and molecular dynamics. P7w and P12w show the most significant binding scores with acetylcholinesterases, while P8w and P13w are with butyrylcholinesterase enzyme. Finally, molecular dynamics illustrate stable interactions between CPF degradants and cholinesterase enzyme over a 100 ns time frame and determine P7w as the riskiest degradant to the neural developmental system.
Collapse
Affiliation(s)
- Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam
| | - Thi Le Anh Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam.
| | - Nissrin Alharzali
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 84215, Bratislava, Slovakia
| | - Hisham K Al Rawas
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France
| | - Sonia Taamalli
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France.
| | - Marc Ribaucour
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France
| | - Hoang Linh Nguyen
- School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam; Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, 700000, Viet Nam
| | - Abderrahman El Bakali
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France
| | - Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam
| | - Ivan Černušák
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 84215, Bratislava, Slovakia
| | - Florent Louis
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de L'Atmosphère - PC2A, 59000, Lille, France
| | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, 550000, Viet Nam
| |
Collapse
|
2
|
Shiroudi A, Czub J, Altarawneh M. Chemical Investigation on the Mechanism and Kinetics of the Atmospheric Degradation Reaction of Trichlorofluoroethene by OH⋅ and Its Subsequent Fate in the Presence of O 2 /NOx. Chemphyschem 2024; 25:e202300665. [PMID: 37983906 DOI: 10.1002/cphc.202300665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 11/22/2023]
Abstract
The M06-2X/6-311++G(d,p) level of theory was used to examine the degradation of Trichlorofluoroethene (TCFE) initiated by OH⋅ radicals. Additionally, the coupled-cluster single-double with triple perturbative [CCSD(T)] method was employed to refine the single-point energies using the complete basis set extrapolation approach. The results indicated that OH-addition is the dominant pathway. OH⋅ adds to both the C1 and C2 carbons, resulting in the formation of the C(OH)Cl2 -⋅CClF and ⋅CCl2 -C(OH)ClF species. The associated barrier heights were determined to be 1.11 and -0.99 kcal mol-1 , respectively. Furthermore, the energetic and thermodynamic parameters show that pathway 1 exhibits greater exothermicity and exergonicity compared to pathway 2, with differences of 8.11 and 8.21 kcal mol-1 , correspondingly. The primary pathway involves OH addition to the C2 position, with a rate constant of 6.2×10-13 cm3 molecule-1 sec-1 at 298 K. This analysis served to estimate the atmospheric lifetime, along with the photochemical ozone creation potential (POCP) and ozone depletion potential (ODP). It yielded an atmospheric lifetime of 8.49 days, an ODP of 4.8×10-4 , and a POCP value of 2.99, respectively. Radiative forcing efficiencies were also estimated at the M06-2X/6-311++G(d,p) level. Global warming potentials (GWPs) were calculated for 20, 100, and 500 years, resulting in values of 9.61, 2.61, and 0.74, respectively. TCFE is not expected to make a significant contribution to the radiative forcing of climate change. The results obtained from the time-dependent density functional theory (TDDFT) indicated that TCFE and its energized adducts are unable to photolysis under sunlight in the UV and visible spectrum. Secondary reactions involve the [TCFE-OH-O2 ]⋅ peroxy radical, leading subsequently to the [TCFE-OH-O]⋅ alkoxy radical. It was found that the alkoxy radical resulting from the peroxy radical can lead to the formation of phosgene (COCl2 ) and carbonyl chloride fluoride (CClFO), with phosgene being the primary product.
Collapse
Affiliation(s)
- Abolfazl Shiroudi
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk, 80-233, Poland
- BioTechMed Center, Gdańsk University of Technology, Gdańsk, 80-233, Poland
| | - Jacek Czub
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk, 80-233, Poland
- BioTechMed Center, Gdańsk University of Technology, Gdańsk, 80-233, Poland
| | - Mohammednoor Altarawneh
- United Arab Emirates University, Department of Chemical and Petroleum Engineering, Sheikh Khalifa bin Zayed Street, Al-Ain, 15551, United Arab Emirates
| |
Collapse
|
3
|
K Al Rawas H, Al Mawla R, Pham TYN, Truong DH, Nguyen TLA, Taamalli S, Ribaucour M, El Bakali A, Černušák I, Dao DQ, Louis F. New insight into environmental oxidation of phosmet insecticide initiated by HO˙ radicals in gas and water - a theoretical study. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2023; 25:2042-2056. [PMID: 37850503 DOI: 10.1039/d3em00325f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2023]
Abstract
Phosmet is an organophosphorus insecticide widely used in agriculture to control a range of insects; recently, it was banned by the European Union in 2022 due to its harmful effects. However, its environmental degradation and fate have not yet been evident. Thus, phosmet oxidation by HO˙ radicals was theoretically studied in this work using the DFT approach at the M06-2X/6-311++G(3df,3pd)//M06-2X/6-31+G(d,p) level of theory. Three different mechanisms were considered, including formal hydrogen transfer (FHT), radical adduct formation (RAF), and single electron transfer (SET). The mechanisms, kinetics, and lifetime were studied in the gas and aqueous phases, in addition to its ecotoxicity evaluation. The results show that FHT reactions were dominant in the gas phase, while RAF was more favourable in the aqueous phase at 298 K, while SET was negligible. The branching ratio indicated that H-abstractions at the methyl and the methylene groups were the most predominant, while the most favourable HO˙-addition was observed at the phosphorus atom of the dithiophosphate group. The overall rate constant values varied from 1.2 × 109 (at 283 K) to 1.40 × 109 M-1 s-1 (at 323 K) in the aqueous phase and from 6.29 × 1010 (at 253 K) to 1.32 × 1010 M-1 s-1 (at 323 K) in the gas phase. The atmospheric lifetime of phosmet is about 6 hours at 287 K, while it can persist from a few seconds to several years depending on the temperature and [HO˙] concentration in the aqueous environment. The QSAR-based ecotoxicity evaluation indicates that phosmet and its degradation products are all dangerous to aquatic organisms, although the products are less toxic than phosmet. However, they are generally developmental toxicants and mutagenicity-negative compounds.
Collapse
Affiliation(s)
- Hisham K Al Rawas
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de l'Atmosphère - PC2A, 59000 Lille, France
| | - Reem Al Mawla
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de l'Atmosphère - PC2A, 59000 Lille, France
| | - Thi Yen Nhi Pham
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam.
- School of Engineering and Technology, Duy Tan University, Da Nang 550000, Vietnam
| | - Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam.
- School of Engineering and Technology, Duy Tan University, Da Nang 550000, Vietnam
| | - Thi Le Anh Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam.
- School of Engineering and Technology, Duy Tan University, Da Nang 550000, Vietnam
| | - Sonia Taamalli
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de l'Atmosphère - PC2A, 59000 Lille, France
| | - Marc Ribaucour
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de l'Atmosphère - PC2A, 59000 Lille, France
| | - Abderrahman El Bakali
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de l'Atmosphère - PC2A, 59000 Lille, France
| | - Ivan Černušák
- School of Engineering and Technology, Duy Tan University, Da Nang 550000, Vietnam
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 84215 Bratislava, Slovakia
| | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam.
- School of Engineering and Technology, Duy Tan University, Da Nang 550000, Vietnam
| | - Florent Louis
- Univ. Lille, CNRS, UMR 8522, Physico-Chimie des Processus de Combustion et de l'Atmosphère - PC2A, 59000 Lille, France
| |
Collapse
|
4
|
Balsini SS, Shiroudi A, Hatamjafari F, Zahedi E, Pourshamsian K, Oliaey AR. Understanding the kinetics and atmospheric degradation mechanism of chlorotrifluoroethylene (CF 2CFCl) initiated by OH radicals. Phys Chem Chem Phys 2023; 25:13630-13644. [PMID: 37144555 DOI: 10.1039/d3cp00161j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The atmospheric degradation of chlorotrifluoroethylene (CTFE) by OH˙ was investigated using density functional theory (DFT). The potential energy surfaces were also defined in terms of single-point energies derived from the linked cluster CCSD(T) theory. With an energy barrier of -2.62 to -0.99 kcal mol-1 using the M06-2x method, the negative temperature dependence was determined. The OH˙ attack on Cα and Cβ atoms (labeled pathways R1 and R2, respectively) shows that reaction R2 is 4.22 and 4.42 kcal mol-1, respectively, more exothermic and exergonic than reaction R1. The main pathway should be the addition of OH˙ to the β-carbon, resulting in ˙CClF-CF2OH species. At 298 K, the calculated rate constant was 9.87 × 10-13 cm3 molecule-1 s-1. The TST and RRKM calculations of rate constants and branching ratios were performed at P = 1 bar and in the fall-off pressure regime over the temperature range of 250-400 K. The formation of HF and ˙CClF-CFO species via the 1,2-HF loss process is the most predominant pathway both kinetically and thermodynamically. With increasing temperature and decreasing pressure, the regioselectivity of unimolecular processes of energized adducts [CTFE-OH]˙ gradually decreases. Pressures greater than 10-4 bar are often adequate for assuring saturation of the estimated unimolecular rates when compared to the RRKM rates (in high-pressure limit). Subsequent reactions involve the addition of O2 to the [CTFE-OH]˙ adducts at the α-position of the OH group. The [CTFE-OH-O2]˙ peroxy radical primarily reacts with NO and then directly decomposes into NO2 and oxy radicals. "Carbonic chloride fluoride", "carbonyl fluoride", and "2,2-difluoro-2-hydroxyacetyl fluoride" are predicted to be stable products in an oxidative atmosphere.
Collapse
Affiliation(s)
- Saber Safari Balsini
- Department of Chemistry, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.
| | - Abolfazl Shiroudi
- Department of Chemistry, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland.
| | - Farhad Hatamjafari
- Department of Chemistry, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.
| | - Ehsan Zahedi
- Department of Chemistry, Shahrood Branch, Islamic Azad University, Shahrood, Iran
| | - Khalil Pourshamsian
- Department of Chemistry, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.
| | - Ahmad Reza Oliaey
- Department of Chemistry, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.
| |
Collapse
|
5
|
Shahsavar F, Zahedi E, Shiroudi A, Chahkandi B. Atmospheric degradation mechanism of anthracene initiated by OH •: A DFT prediction. J Mol Graph Model 2023; 121:108426. [PMID: 36806124 DOI: 10.1016/j.jmgm.2023.108426] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/27/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023]
Abstract
Density functional theory (DFT) calculations at the M06-2X/def2-TZVP level have been employed to investigate the atmospheric oxidation mechanism of anthracene (ANT) initiated by HO•. Direct hydrogen atom abstraction from the ANT using HO• takes place hardly at ambient conditions while addition of HO• to the C1, C2, and C4 sites are thermodynamically and kinetically more advantageous. The addition reactions are controlled by the aromaticity and the kinetic trends were justified by resonance stabilization energies. The rate constants were calculated by using the Rice-Ramsperger-Kassel-Marcus (RRKM) and canonical transition state theory (CTST) methods in conjugation with zero curvature tunneling (ZCT). The overall RRKM-bimolecular rate constant at ambient conditions is 6.72 × 10-12 cm3 molecule-1 s-1, is negatively dependent on the temperature and can be expressed as k250-3501bar=3.92×10-14exp(1534.9T). Contribution of the AD-C4 path in the overall reaction is about 70-80%, implying that the dependence of overall rate constant on pressure can be ignored. The kinetic data exhibit that the ANT is degraded during its long-range transport in the atmosphere and cannot be classified as persistent organic pollutants.
Collapse
Affiliation(s)
- Farzaneh Shahsavar
- Department of Chemistry, Shahrood Branch, Islamic Azad University, Shahrood, Iran
| | - Ehsan Zahedi
- Department of Chemistry, Shahrood Branch, Islamic Azad University, Shahrood, Iran.
| | - Abolfazl Shiroudi
- Department of Physical Chemistry, Gdansk University of Technology, Narutowicza St 11/12, 80-233, Gdansk, Poland; Research Club, IQneiform Oy, Juva, Finland
| | - Behzad Chahkandi
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| |
Collapse
|
6
|
Dao DQ, Taamalli S, Louis F, Kdouh D, Srour Z, Ngo TC, Truong DH, Fèvre-Nollet V, Ribaucour M, El Bakali A, Černuśák I. Hydroxyl radical-initiated decomposition of metazachlor herbicide in the gaseous and aqueous phases: Mechanism, kinetics, and toxicity evaluation. CHEMOSPHERE 2023; 312:137234. [PMID: 36375615 DOI: 10.1016/j.chemosphere.2022.137234] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/09/2022] [Accepted: 11/10/2022] [Indexed: 06/16/2023]
Abstract
The oxidation of widely-used herbicide metazachlor (MTZ) by hydroxyl radical (HO•) in the gas and the aqueous phases was investigated in terms of mechanistic and kinetic behaviors using the M06-2X/6-311++G (3df, 3pd)//M06-2X/6-31 + G (d,p) level of theory over the temperature range 250-400 K. The formal hydrogen transfer, HO•-addition, and single electron transfer mechanisms were considered. The overall rate constants in the gas phase range from 8.40 × 1010 to 8.31 × 109 M-1 s-1 at the temperature from 250 to 400 K, respectively, while the ones in the aqueous phase are close to diffusion-controlled rates, with diffusion-corrected rate constants being 1.31 × 109 to 1.27 × 109 M-1 s-1. The formal hydrogen transfer mechanism is the most dominant in the gas phase, whereas the HO•-addition is the most favorable in the aqueous phase. The H-abstraction at two methyl groups and the HO•-addition to C11 and C12 atoms (pyrazole ring), C16 and C18 atoms (benzyl ring) are significant. The short lifetime in the environment, equal to only 4.16 h, requires more attention to this herbicide compound, whereas its lifetime in the aqueous condition varies sharply from half second to several thousand days depending on the HO• concentration. The ecotoxicity estimation of MTZ and its principal transformation products to aquatic organisms suggests that they are harmful or toxic substances. Moreover, the MTZ is a developmental toxicant and mutagenicity-positive, while its decomposed products are developmental toxicants with no mutagenic toxicity. Their bioaccumulation in aquatic organisms is negligible.
Collapse
Affiliation(s)
- Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam; Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Viet Nam.
| | - Sonia Taamalli
- Université de Lille, CNRS, UMR 8522 - PC2A - PhysicoChimie des Processus de Combustion et de L'Atmosphère, 590000 Lille, France.
| | - Florent Louis
- Université de Lille, CNRS, UMR 8522 - PC2A - PhysicoChimie des Processus de Combustion et de L'Atmosphère, 590000 Lille, France
| | - Doha Kdouh
- Université de Lille, CNRS, UMR 8522 - PC2A - PhysicoChimie des Processus de Combustion et de L'Atmosphère, 590000 Lille, France
| | - Zainab Srour
- Université de Lille, CNRS, UMR 8522 - PC2A - PhysicoChimie des Processus de Combustion et de L'Atmosphère, 590000 Lille, France
| | - Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam; Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Viet Nam
| | - Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam; Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Viet Nam
| | - Valerie Fèvre-Nollet
- Université de Lille, CNRS, UMR 8522 - PC2A - PhysicoChimie des Processus de Combustion et de L'Atmosphère, 590000 Lille, France
| | - Marc Ribaucour
- Université de Lille, CNRS, UMR 8522 - PC2A - PhysicoChimie des Processus de Combustion et de L'Atmosphère, 590000 Lille, France
| | - Abderrahman El Bakali
- Université de Lille, CNRS, UMR 8522 - PC2A - PhysicoChimie des Processus de Combustion et de L'Atmosphère, 590000 Lille, France
| | - Ivan Černuśák
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia
| |
Collapse
|
7
|
Boulebd H. DFT analysis of peroxyl radical scavenging capacity of Coumestrol: insights into kinetics and reaction mechanisms. J PHYS ORG CHEM 2022. [DOI: 10.1002/poc.4421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest University of Frères Mentouri Constantine 1 Constantine Algeria
| |
Collapse
|
8
|
Rashidiani M, Zahedi E, Zare K, Seif A. Theoretical investigation on the mechanism and kinetics of the OH•‒initiated atmospheric degradation of p-chloroaniline via OH•‒addition and hydrogen abstraction pathways. J Mol Graph Model 2022; 114:108198. [DOI: 10.1016/j.jmgm.2022.108198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 04/08/2022] [Accepted: 04/11/2022] [Indexed: 11/27/2022]
|
9
|
Yang Z, Du L, Li Y, Ge X. Secondary organic aerosol formation from monocyclic aromatic hydrocarbons: insights from laboratory studies. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:351-379. [PMID: 35171163 DOI: 10.1039/d1em00409c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Monocyclic aromatic hydrocarbons (MAHs) are key anthropogenic pollutants and often dominate the volatile organic compound emissions and secondary organic aerosol (SOA) formation especially in the urban atmosphere. To evaluate the environmental impacts of SOA formed from the oxidation of MAHs (aromatic SOA), it is of great importance to elucidate their chemical composition, formation mechanism, and physicochemical properties under various atmospheric conditions. Here we seek to compile a common framework for the current studies on aromatic SOA formation and summarize the knowledge on what has been primarily learned from laboratory studies. This review begins with a brief summary of MAHs' emission characteristics, followed by an overview of atmospheric degradation mechanisms for MAHs as well as gas- and particle-phase reactions involving aromatic SOA formation. SOA formation processes highlighted in this review are complex and depend highly on environmental conditions, posing a substantial challenge for theoretical description of aromatic SOA formation. Therefore, the following issues are further discussed in detail: the response of gas-phase chemistry and aromatic SOA mass yield as well as composition to NOx levels, particle-phase reactions and molecular characterization of aromatic SOA in the presence of acidic sulfate, and physicochemical processes of SOA formation involving gas- or particle-phase water. Building on this current understanding, available experimental studies on the effects of environmental conditions were explored. A brief description of the atmospheric importance of aromatic SOA including their optical properties and health influences is also presented. Finally, we highlight the current challenges in laboratory studies and outline directions for future aromatic SOA research.
Collapse
Affiliation(s)
- Zhaomin Yang
- Environment Research Institute, Shandong University, 266000, Qingdao, China.
| | - Lin Du
- Environment Research Institute, Shandong University, 266000, Qingdao, China.
| | - Yongjie Li
- Department of Civil and Environmental Engineering, and Centre for Regional Oceans, Faculty of Science and Technology, University of Macau, Macau, China
| | - Xinlei Ge
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 210044, Nanjing, China
| |
Collapse
|
10
|
Boulebd H, Pereira DM, Amine Khodja I, Hoa NT, Mechler A, Vo QV. Assessment of the free radical scavenging potential of cannabidiol under physiological conditions: Theoretical and experimental investigations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118277] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
11
|
Hoa NT, Ngoc Van LT, Vo QV. The hydroperoxyl antiradical activity of natural hydroxycinnamic acid derivatives in physiological environments: the effects of pH values on rate constants. RSC Adv 2022; 12:15115-15122. [PMID: 35702430 PMCID: PMC9115882 DOI: 10.1039/d2ra02311c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/11/2022] [Indexed: 11/21/2022] Open
Abstract
Quantum chemistry calculations suggest that hydroxycinnamic acid derivatives are good natural antioxidants in aqueous solutions.
Collapse
Affiliation(s)
- Nguyen Thi Hoa
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
| | | | - Quan V. Vo
- The University of Danang – University of Technology and Education, Danang 550000, Vietnam
| |
Collapse
|
12
|
Boulebd H. Is cannabidiolic acid an overlooked natural antioxidant? Insights from quantum chemistry calculations. NEW J CHEM 2022. [DOI: 10.1039/d1nj04771j] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The radical scavenging capacity of CBDA is moderate in lipid media but it is very important in water via the SET mechanism.
Collapse
Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria
| |
Collapse
|
13
|
Boulebd H, Amine Khodja I. A detailed DFT-based study of the free radical scavenging activity and mechanism of daphnetin in physiological environments. PHYTOCHEMISTRY 2021; 189:112831. [PMID: 34146991 DOI: 10.1016/j.phytochem.2021.112831] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 06/05/2021] [Accepted: 06/06/2021] [Indexed: 05/08/2023]
Abstract
Daphnetin, a biologically active coumarin derivative found in plants of the genus Daphne, is a potent antioxidant phenolic compound. The present work describes the mechanisms and kinetics of the HO, NO, HOO, and NO2 scavenging activities of daphnetin in physiological environments using quantum chemistry calculations. The main antiradical mechanisms have been studied: formal hydrogen transfer (FHT), sequential electron transfer proton transfer (SETPT), sequential proton loss electron transfer (SPLET), and radical adduct formation (RAF). Besides its good HO scavenging activity in physiological environments, daphnetin is expected to exhibit good HOO and NO2 scavenging activities in water with koverall = 1.51 × 107 and 4.79 × 108 M-1s-1, respectively. The FHT mechanism decides the HO scavenging activity in aqueous solution, as well as HO, HOO, and NO2 scavenging activities in lipid media, while SPLET is the primary mechanism in water for HOO and NO2 scavenging activities. The theoretical predictions were found to be in good agreement with the available experimental data, which supports the reliability of the calculations.
Collapse
Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria.
| | - Imene Amine Khodja
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria
| |
Collapse
|
14
|
Rahbar A, Zahedi E, Aghaie H, Giahi M, Zare K. DFT Insight into the Kinetics and Mechanism of the OH
.
‐Initiated Atmospheric Oxidation of Catechol: OH
.
Addition and Hydrogen Abstraction Pathways. ChemistrySelect 2021. [DOI: 10.1002/slct.202100524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ali Rahbar
- Department of Chemistry, Science and Research Branch Islamic Azad University Tehran Iran
| | - Ehsan Zahedi
- Department of Chemistry, Herbal Medicines Raw Materials Research Center, Shahrood Branch Islamic Azad University, Shahrood Iran
| | - Hossein Aghaie
- Department of Chemistry, Science and Research Branch Islamic Azad University Tehran Iran
| | - Masoud Giahi
- Department of Chemistry, South-Tehran Branch Islamic Azad University Tehran Iran
| | - Karim Zare
- Department of Chemistry, Science and Research Branch Islamic Azad University Tehran Iran
| |
Collapse
|
15
|
Boulebd H. Are thymol, rosefuran, terpinolene and umbelliferone good scavengers of peroxyl radicals? PHYTOCHEMISTRY 2021; 184:112670. [PMID: 33524861 DOI: 10.1016/j.phytochem.2021.112670] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 01/05/2021] [Accepted: 01/09/2021] [Indexed: 06/12/2023]
Abstract
DFT-based computational calculations have been used to investigate the hydroperoxyl radical scavenging activity of four essential oil constituents namely thymol (Thy), rosefuran (Ros), terpinolene (Ter), and umbelliferone (Umb). Different reaction mechanisms including formal hydrogen transfer (FHT), radical adduct formation (RAF), sequential proton loss electron transfer (SPLET), and sequential electron transfer proton transfer (SETPT) have been examined in the gas phase and physiological environments. It was found that the HOO radical scavenging activity of these compounds is strongly influenced by the environment, which becomes more important in water than pentyl ethanoate. According to the overall reaction rate constants, the phenolic compounds Thy and Umb are predicted to exhibit excellent activity in aqueous solution. Umb with an overall rate constant of 1.44 × 108M-1s-1 at physiological pH is among the best HOO radical scavengers in water with activity comparable to that of caffeic acid, higher than those of ascorbic acid, guaiacol and eugenol, and much higher than that of Trolox.
Collapse
Affiliation(s)
- Houssem Boulebd
- Laboratory of Synthesis of Molecules with Biological Interest, University of Frères Mentouri Constantine 1, Constantine, Algeria.
| |
Collapse
|
16
|
Mahmoud MA, Shiroudi A, Abdel-Rahman MA, Shibl MF, Abdel-Azeim S, El-Nahas AM. Structures, energetics, and kinetics of H-atom abstraction from methyl propionate by molecular oxygen: Ab initio and DFT investigations. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2020.113119] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
17
|
Abdel-Rahman MA, Shibl MF, El-Nahas AM, Abdel-Azeim S, El-demerdash SH, Al-Hashimi N. Mechanistic insights of the degradation of an O-anisidine carcinogenic pollutant initiated by OH radical attack: theoretical investigations. NEW J CHEM 2021. [DOI: 10.1039/d0nj06248k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
O-Anisidine (O-AND) is one of the amino organic compounds that harm human health, and is considered as a carcinogenic chemical.
Collapse
Affiliation(s)
| | - Mohamed F. Shibl
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha
- Qatar
| | - Ahmed M. El-Nahas
- Chemistry Department
- Faculty of Science
- Menoufia University
- Shebin El-Kom 32512
- Egypt
| | - Safwat Abdel-Azeim
- Center for Integrative Petroleum Research (CIPR)
- College of Petroleum Engineering and Geosciences
- King Fahd University of Petroleum and Minerals (KFUPM)
- Dhahran 31261
- Saudi Arabia
| | | | - Nessreen Al-Hashimi
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha
- Qatar
| |
Collapse
|
18
|
Song M, Liu Y, Li X, Lu S. Advances on Atmospheric Oxidation Mechanism of Typical Aromatic Hydrocarbons. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21050224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
19
|
Castro-González LM, Galano A, Alvarez-Idaboy JR. Free radical scavenging activity of newly designed sesamol derivatives. NEW J CHEM 2021. [DOI: 10.1039/d1nj02225c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Recently proposed derivatives of sesamol as better oxidants than the parent molecule are predicted to react faster, with several orders larger rate constants than sesamol itself.
Collapse
Affiliation(s)
- Laura M. Castro-González
- Department of Biological Sciences
- Centre for Molecular Simulation
- University of Calgary
- Calgary
- Canada
| | - Annia Galano
- Departamento de Química
- Universidad Autónoma Metropolitana-Iztapalapa
- Mexico
| | - Juan Raúl Alvarez-Idaboy
- Departamento de Física y Química Teórica, Facultad de Química, Universidad Nacional Autónoma de México
- Mexico
| |
Collapse
|
20
|
Seif A, Domingo LR, Mazarei E, Zahedi E, Ahmadi TS. Atmospheric Oxidation Reactions of Methyl Salicylate as Green Leaf Volatiles by OH Radical: Theoretical Kinetics and Mechanism. ChemistrySelect 2020. [DOI: 10.1002/slct.202003286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ahmad Seif
- Department of Chemistry Central Tehran Branch Islamic Azad University Tehran Iran
- Department of Organic Chemistry University of Valencia, Dr. Moliner 50 46100 Burjassot Valencia Spain
| | - Luis Ramon Domingo
- Department of Organic Chemistry University of Valencia, Dr. Moliner 50 46100 Burjassot Valencia Spain
| | - Elham Mazarei
- Department of Organic Chemistry University of Valencia, Dr. Moliner 50 46100 Burjassot Valencia Spain
| | - Ehsan Zahedi
- Department of Chemistry Shahrood Branch Islamic Azad University Shahrood Iran
| | - Temer Shah Ahmadi
- Department of Organic Chemistry University of Valencia, Dr. Moliner 50 46100 Burjassot Valencia Spain
- Department of Chemistry Villanova University Villanova PA 19085 USA
| |
Collapse
|
21
|
Pratali Maffei L, Faravelli T, Cavallotti C, Pelucchi M. Electronic structure-based rate rules for ipso addition-elimination reactions on mono-aromatic hydrocarbons with single and double OH/CH 3/OCH 3/CHO/C 2H 5 substituents: a systematic theoretical investigation. Phys Chem Chem Phys 2020; 22:20368-20387. [PMID: 32901626 DOI: 10.1039/d0cp03099f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The recent interest in bio-oils combustion and the key role of mono-aromatic hydrocarbons (MAHs) in existing kinetic frameworks, both in terms of poly-aromatic hydrocarbons growth and surrogate fuels formulation, motivates the current systematic theoretical investigation of one of the relevant reaction classes in MAHs pyrolysis and oxidation: ipso substitution by hydrogen. State-of-the-art theoretical methods and protocols implemented in automatized computational routines allowed to investigate 14 different potential energy surfaces involving MAHs with hydroxy and methyl single (phenol and toluene) and double (o-,m-,p-C6H4(OH)2, o-,m-,p-CH3C6H4OH, and o-,m-,p-C6H4(CH3)2) substituents, providing rate constants for direct implementation in existing kinetic models. The accuracy of the adopted theoretical method was validated by comparison of the computed rate constants with the available literature data. Systematic trends in energy barriers, pre-exponential factors, and temperature dependence of the Arrhenius parameters were found, encouraging the formulation of rate rules for ipso substitutions on MAHs. The rules here proposed allow to extrapolate from a reference system the necessary activation energy and pre-exponential factor corrections for a large number of reactions from a limited set of electronic structure calculations. We were able to estimate rate constants for other 63 ipso addition-elimination reactions on di-substituted MAHs, reporting in total 75 rate constants for ipso substitution reactions o-,m-,p-R'C6H4R + → C6H5R + ', with R,R' = OH/CH3/OCH3/CHO/C2H5, in the 300-2000 K range. Additional calculations performed for validation showed that the proposed rate rules are in excellent agreement with the rate constants calculated using the full computational protocol in the 500-2000 K range, generally with errors below 20%, increasing up to 40% in a few cases. The main results of this work are the successful application of automatized electronic structure calculations for the derivation of accurate rate constants for ipso substitution reactions on MAHs, and an efficient and innovative approach for rate rules formulation for this reaction class.
Collapse
Affiliation(s)
- Luna Pratali Maffei
- CRECK Modelling Lab, Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, P.zza Leonardo da Vinci 32, 20133 Milano, Italy.
| | - Tiziano Faravelli
- CRECK Modelling Lab, Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, P.zza Leonardo da Vinci 32, 20133 Milano, Italy.
| | - Carlo Cavallotti
- CRECK Modelling Lab, Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, P.zza Leonardo da Vinci 32, 20133 Milano, Italy.
| | - Matteo Pelucchi
- CRECK Modelling Lab, Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, P.zza Leonardo da Vinci 32, 20133 Milano, Italy.
| |
Collapse
|
22
|
Wu X, Huang C, Niu S, Zhang F. New theoretical insights into the reaction kinetics of toluene and hydroxyl radicals. Phys Chem Chem Phys 2020; 22:22279-22288. [DOI: 10.1039/d0cp02984j] [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
This work provides theoretical insights into the kinetics of toluene + OH, focusing on the anharmonic effect and the accuracy of barrier heights.
Collapse
Affiliation(s)
- Xiaoqing Wu
- National Synchrotron Radiation Laboratory
- University of Science and Technology of China
- Hefei
- P. R. China
- Hefei National Laboratory for Physical Sciences at the Microscale
| | - Can Huang
- Chair of Technical Thermodynamics
- RWTH Aachen University
- 52062 Aachen
- Germany
| | - Shiyao Niu
- Science and Technology on Combustion and Explosion Laboratory
- Xi'an Modern Chemistry Research Institute
- Xi'an
- P. R. China
- School of Chemistry and Materials Science
| | - Feng Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei
- P. R. China
| |
Collapse
|
23
|
Tahan A, Shiroudi A. Oxidation reaction mechanism and kinetics between OH radicals and alkyl-substituted aliphatic thiols: H-abstraction pathways. PROGRESS IN REACTION KINETICS AND MECHANISM 2019. [DOI: 10.1177/1468678319886129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Kinetic rate constants for the oxidation reaction of the hydroxyl radical with CH3SH, C2H5SH, n-C3H7SH, and iso-C3H7SH under inert (Ar) conditions over the temperature range 252–430 K have been studied theoretically using density functional theory along with various exchange–correlation functionals as well as the benchmark CBS-QB3 quantum chemical approach. Bimolecular rate constants were estimated using transition state theory and the statistical Rice–Ramsperger–Kassel–Marcus theory. Comparison with experiment confirms that in the OH addition reaction pathways leading to the related products, the first bimolecular reaction steps have effective negative activation energy barriers. Effective rate constants have been calculated according to a steady-state analysis of a two-step model reaction mechanism. As a consequence of the negative activation energies, pressures higher than 104 bar are required to reach the high-pressure limit. Both from thermodynamic and kinetic viewpoints, the most favorable process here is the oxidation reaction of hydroxyl radicals with n-C3H7SH.
Collapse
Affiliation(s)
- Arezoo Tahan
- Chemistry Department, Semnan Branch, Islamic Azad University, Semnan, Iran
| | - Abolfazl Shiroudi
- Young Researchers and Elite Club, East Tehran Branch, Islamic Azad University, Tehran, Iran
| |
Collapse
|
24
|
Tahan A, Shiroudi A. Oxidation reaction mechanism and kinetics between OH radicals and alkyl-substituted aliphatic thiols: OH-addition pathways. PROGRESS IN REACTION KINETICS AND MECHANISM 2019. [DOI: 10.1177/1468678319832382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Kinetic rate constants for the oxidation reactions of OH radicals with CH3SH (1), C2H5SH (2), n-C3H7SH (3) and iso-C3H7SH (4) under inert conditions (Ar) over the temperature range 252−430 K have been studied using the CBS-QB3 composite method. Kinetic rate constants under atmospheric pressure and in the fall-off regime have been estimated using transition state theory (TST) and statistical Rice–Ramsperger–Kassel–Marcus (RRKM) theory. Comparison with experiment confirms that in the OH-addition pathways 1−4 leading to the related products, the first bimolecular reaction step has effective negative activation energies around −2.61 to 3.70 kcal mol−1. Effective rate coefficients have been calculated according to a steady-state analysis of a two-step model reaction mechanism. As a result of the negative activation energies, pressures larger than 104 bar would be required to restore to some extent the validity of this approximation for all the channels. By comparison with experimental data, all our calculations for both the OH-addition and H-abstraction reaction pathways indicate that from a kinetic viewpoint and in line with the computed reaction energy barriers, the most favourable process is the OH-addition pathway to n-C3H7SH to yield the [ n-C3H7SH−OH]• species, whereas under thermodynamic control of the bimolecular reactions (R−SH+OH•), the most abundant product derived from the H-abstraction pathway will be the [ n-C3H7 S•+H2O] species.
Collapse
Affiliation(s)
- Arezoo Tahan
- Chemistry Department, Semnan Branch, Islamic Azad University, Semnan, Iran
| | - Abolfazl Shiroudi
- Young Researchers and Elite Club, East Tehran Branch, Islamic Azad University, Tehran, Iran
| |
Collapse
|
25
|
Safaei Z, Shiroudi A, Zahedi E, Sillanpää M. Atmospheric oxidation reactions of imidazole initiated by hydroxyl radicals: kinetics and mechanism of reactions and atmospheric implications. Phys Chem Chem Phys 2019; 21:8445-8456. [DOI: 10.1039/c9cp00632j] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The atmospheric oxidation mechanism of imidazole initiated by hydroxyl radicals is investigated via OH-addition and H-abstraction pathways by quantum chemistry calculations at the M06-2X/aug-cc-pVTZ level of theory coupled with reaction kinetics calculations using statistical Rice–Ramsperger–Kassel–Marcus (RRKM) theory and transition state theory (TST).
Collapse
Affiliation(s)
- Zahra Safaei
- Department of Green Chemistry
- LUT University
- Sammonkatu 12
- FI-50130 Mikkeli
- Finland
| | - Abolfazl Shiroudi
- Young Researchers and Elite Club
- East Tehran Branch
- Islamic Azad University
- Tehran
- Iran
| | - Ehsan Zahedi
- Chemistry Department
- Shahrood Branch
- Islamic Azad University
- Shahrood
- Iran
| | - Mika Sillanpää
- Department of Green Chemistry
- LUT University
- Sammonkatu 12
- FI-50130 Mikkeli
- Finland
| |
Collapse
|
26
|
Zhang RM, Truhlar DG, Xu X. Kinetics of the Toluene Reaction with OH Radical. RESEARCH (WASHINGTON, D.C.) 2019; 2019:5373785. [PMID: 31549067 PMCID: PMC6750082 DOI: 10.34133/2019/5373785] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 02/10/2019] [Indexed: 11/16/2022]
Abstract
We calculated the kinetics of chemical activation reactions of toluene with hydroxyl radical in the temperature range from 213 K to 2500 K and the pressure range from 10 Torr to the high-pressure limit by using multistructural variational transition state theory with the small-curvature tunneling approximation (MS-CVT/SCT) and using the system-specific quantum Rice-Ramsperger-Kassel method. The reactions of OH with toluene are important elementary steps in both combustion and atmospheric chemistry, and thus it is valuable to understand the rate constants both in the high-pressure, high-temperature regime and in the low-pressure, low-temperature regime. Under the experimental pressure conditions, the theoretically calculated total reaction rate constants agree well with the limited experimental data, including the negative temperature dependence at low temperature. We find that the effect of multistructural anharmonicity on the partition functions usually increases with temperature, and it can change the calculated reaction rates by factors as small as 0.2 and as large as 4.2. We also find a large effect of anharmonicity on the zero-point energies of the transition states for the abstraction reactions. We report that abstraction of H from methyl should not be neglected in atmospheric chemistry, even though the low-temperature results are dominated by addition. We calculated the product distribution, which is usually not accessible to experiments, as a function of temperature and pressure.
Collapse
Affiliation(s)
- Rui Ming Zhang
- Center for Combustion Energy, Department of Energy and Power Engineering, and Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Donald G. Truhlar
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, MN 55455-0431, USA
| | - Xuefei Xu
- Center for Combustion Energy, Department of Energy and Power Engineering, and Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
| |
Collapse
|
27
|
Sun C, Zeng Y, Xu B, Meng L. Mechanism and kinetics for the reactions of methacrolein and methyl vinyl ketone with HO2 radical. NEW J CHEM 2017. [DOI: 10.1039/c7nj01260h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism and kinetics for the reactions of unsaturated aldehyde and ketone with HO2 radical were investigated.
Collapse
Affiliation(s)
- Cuihong Sun
- College of Chemical Engineering
- Shijiazhuang University
- Shijiazhuang
- People's Republic of China
- College of Chemistry and Material Science
| | - Yanli Zeng
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- People's Republic of China
| | - Baoen Xu
- College of Chemical Engineering
- Shijiazhuang University
- Shijiazhuang
- People's Republic of China
| | - Lingpeng Meng
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang
- People's Republic of China
| |
Collapse
|
28
|
Sun C, Lv L, Zhang S. Theoretical investigation on the reaction mechanism and kinetics of benzyl alcohol with OH radical. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1811-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
29
|
Theoretical study of the oxidation mechanisms of thiophene initiated by hydroxyl radicals. J Mol Model 2015; 21:301. [PMID: 26531303 DOI: 10.1007/s00894-015-2839-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 10/09/2015] [Indexed: 10/22/2022]
Abstract
The mechanisms for the oxidation of thiophene by OH radicals under inert conditions (Ar) have been studied using density functional theory in conjunction with various exchange-correlation functionals. These results were compared with benchmark CBS-QB3 theoretical results. Kinetic rate constants were estimated by means of variational transition state theory (VTST) and the statistical Rice-Ramsperger-Kassel-Marcus (RRKM) theory. Effective rate constants were calculated via a steady-state analysis based upon a two-step model reaction mechanism. In line with experimental results, the computed branching ratios indicate that the most kinetically efficient process involves OH addition to a carbon atom adjacent to the sulfur atom. Due to the presence of negative activation energies, pressures larger than 10(4) bar are required to reach the high-pressure limit. Nucleus-independent chemical shift indices and natural bond orbital analysis show that the computed activation energies are dictated by changes in aromaticity and charge-transfer effects due to the delocalization of lone pairs from sulfur to empty π(*) orbitals. Graphical Abstract CBS-QB3 energy profiles for the reaction pathways 1-3 characterizing the oxidation of thiophene by hydroxyl radicals into the related products.
Collapse
|
30
|
Zhang W, Du B. Theoretical Investigation on the Reaction between OH Radical and 4,4-Dimethyl-1-pentene in the Presence of O2. J Phys Chem A 2015; 119:4065-72. [PMID: 25849042 DOI: 10.1021/acs.jpca.5b02274] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The atmospheric oxidation mechanism of 4,4-dimethyl-1-pentene (DMP441) initiated by OH radical has been theoretically investigated at the BH&HLYP/6-311++G(d,p) and CCSD(T)/6-31+G(d,p) levels of theory. HC(O)H and 3,3-dimethylbutanal [(CH3)3CCH2C(O)H] are identified in our calculations as major products in the OH-radical-initiated degradation of DMP441 in the presence of O2. However, the epoxide conformers and enols are expected to be minor products because of the high isomerization barriers involved. The calculated results are in qualitative accordance with experimental evidence. Conventional transition state theory has been used to calculate the rate constants of the initial addition channels of the OH + DMP441 reaction over the temperature range 220-500 K. The computed total rate constant at 298 K is 2.20 × 10(-11) cm(3) molecule(-1) s(-1), which is in very good agreement with the experimental value. Furthermore, it has been found that the calculated rate constant exhibits a weak non-Arrhenius behavior over the temperature range 220-500 K. The computed expression for the rate constant is k(OH+DMP441) = 1.22 × 10(-12) exp[(880 K)/T] cm(3) molecule(-1) s(-1).
Collapse
Affiliation(s)
- Weichao Zhang
- College of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, People's Republic of China
| | - Benni Du
- College of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, People's Republic of China
| |
Collapse
|
31
|
Han D, Cao H, Li J, Li M, He M, Hu J. Computational study on the mechanisms and rate constants of the OH-initiated oxidation of ethyl vinyl ether in atmosphere. CHEMOSPHERE 2014; 111:61-69. [PMID: 24997901 DOI: 10.1016/j.chemosphere.2014.03.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 02/23/2014] [Accepted: 03/07/2014] [Indexed: 06/03/2023]
Abstract
The hydroxylation reactions of ethyl vinyl ether (EVE) in the present of O2 and NO are analyzed by using MPWB1K/6-311++G(3df,2p)//MPWB1K/6-31+G(d,p) level of theory. According to the calculated thermodynamic data, the detailed reaction mechanisms of EVE and OH are proposed. All of the ten possible reaction pathways are discussed. The major products of the title reaction are ethyl formate and formaldehyde, which is in accordance with experimental detection. The rate constants of the primary reactions over the temperature of 250-400K and the pressure range of 100-2000Torr are computed by employing MESMER program. At 298K and 760Torr, OH-addition channels are predominate and the total rate constant is ktot=4.53×10(-11)cm(3)molecule(-1)s(-1). The Arrhenius equation is obtained as ktot=6.27×10(-12)exp(611.5/T), according to the rate constants given at different temperatures. Finally, the atmospheric half life of EVE with respect to OH is estimated to be 2.13h.
Collapse
Affiliation(s)
- Dandan Han
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| | - Haijie Cao
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| | - Jing Li
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| | - Mingyue Li
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| | - Maoxia He
- Environment Research Institute, Shandong University, Jinan 250100, PR China.
| | - Jingtian Hu
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| |
Collapse
|
32
|
Huang M, Liao Y, Wang Z, Hao L, Zhang W. A theoretical investigation of NO3-initiated oxidation of toluene. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.03.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
33
|
Shiroudi A, Deleuze MS. Theoretical Study of the Oxidation Mechanisms of Naphthalene Initiated by Hydroxyl Radicals: The H Abstraction Pathway. J Phys Chem A 2014; 118:3625-36. [PMID: 24758438 DOI: 10.1021/jp500124m] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Abolfazl Shiroudi
- Center of Molecular and Materials Modelling, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| | - Michael S. Deleuze
- Center of Molecular and Materials Modelling, Hasselt University, Agoralaan, Gebouw D, B-3590 Diepenbeek, Belgium
| |
Collapse
|
34
|
Tao B, Fletcher AJ. Metaldehyde removal from aqueous solution by adsorption and ion exchange mechanisms onto activated carbon and polymeric sorbents. JOURNAL OF HAZARDOUS MATERIALS 2013; 244-245:240-250. [PMID: 23257324 DOI: 10.1016/j.jhazmat.2012.11.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 10/25/2012] [Accepted: 11/09/2012] [Indexed: 06/01/2023]
Abstract
Metaldehyde removal from aqueous solution was evaluated using granular activated carbon (GAC), a non-functionalised hyper-cross-linked polymer Macronet (MN200) and an ion-exchange resin (S957) with sulfonic and phosphonic functional groups. Equilibrium experimental data were successfully described by Freundlich isotherm models. The maximum adsorption capacity of S957 (7.5 g metaldehyde/g S957) exceeded those of MN200 and GAC. Thermodynamic studies showed that sorption of metaldehyde onto all sorbents is endothermic and processes are controlled by entropic rather than enthalpic changes. Kinetic experiments demonstrated that experimental data for MN200 and GAC obey pseudo-second order models with rates limited by particle diffusion. Comparatively, S957 was shown to obey a pseudo-first order model with a rate-limiting step of metaldehyde diffusion through the solid/liquid interface. Results obtained suggest that metaldehyde adsorption onto MN200 and GAC are driven by hydrophobic interactions and hydrogen bonding, as leaching tendencies were high since no degradation of metaldehyde occurred. Conversely, adsorption of metaldehyde onto S957 occurs via ion-exchange processes, where sulfonic and phosphonic functionalities degrade adsorbed metaldehyde molecules and failure to detect metaldehyde in leaching studies for S957 supports this theory. Consequently, the high adsorption capacity and absence of leaching indicate S957 is promising for metaldehyde removal from source water.
Collapse
Affiliation(s)
- Bing Tao
- Chemical and Process Engineering, Faculty of Engineering, University of Strathclyde, Glasgow G1 1XW, UK
| | | |
Collapse
|
35
|
Cordova-Gomez M, Galano A, Alvarez-Idaboy JR. Piceatannol, a better peroxyl radical scavenger than resveratrol. RSC Adv 2013. [DOI: 10.1039/c3ra42923g] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
|
36
|
Iuga C, Alvarez-Idaboy JR, Russo N. Antioxidant activity of trans-resveratrol toward hydroxyl and hydroperoxyl radicals: a quantum chemical and computational kinetics study. J Org Chem 2012; 77:3868-77. [PMID: 22475027 DOI: 10.1021/jo3002134] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this work, we have carried out a systematic study of the antioxidant activity of trans-resveratrol toward hydroxyl ((•)OH) and hydroperoxyl ((•)OOH) radicals in aqueous simulated media using density functional quantum chemistry and computational kinetics methods. All possible mechanisms have been considered: hydrogen atom transfer (HAT), proton-coupled electron transfer (PCET), sequential electron proton transfer (SEPT), and radical adduct formation (RAF). Rate constants have been calculated using conventional transition state theory in conjunction with the Collins-Kimball theory. Branching ratios for the different paths contributing to the overall reaction, at 298 K, are reported. For the global reactivity of trans-resveratrol toward (•)OH radicals, in water at physiological pH, the main mechanism of reaction is proposed to be the sequential electron proton transfer (SEPT). However, we show that trans-resveratrol always reacts with (•)OH radicals at a rate that is diffusion-controlled, independent of the reaction pathway. This explains why trans-resveratrol is an excellent but very unselective (•)OH radical scavenger that provides antioxidant protection to the cell. Reaction between trans-resveratrol and the hydroperoxyl radical occurs only by phenolic hydrogen abstraction. The total rate coefficient is predicted to be 1.42 × 10(5) M(-1) s(-1), which is much smaller than the ones for reactions of trans-resveratrol with (•)OH radicals, but still important. Since the (•)OOH half-life time is several orders larger than the one of the (•)OH radical, it should contribute significantly to trans-resveratrol oxidation in aqueous biological media. Thus, trans-resveratrol may act as an efficient (•)OOH, and also presumably (•)OOR, radical scavenger.
Collapse
Affiliation(s)
- Cristina Iuga
- Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, 02200 México DF, Mexico.
| | | | | |
Collapse
|
37
|
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]
|
38
|
Hu SX, Yu JG, Li SM, Zeng EY. Theoretical considerations of secondary organic aerosol formation from H-abstraction of p-xylene. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2011.08.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
39
|
Long B, Long ZW, Wang YB, Tan XF, Han YH, Long CY, Qin SJ, Zhang WJ. Formic Acid Catalyzed Gas-Phase Reaction of H2O with SO3 and the Reverse Reaction: A Theoretical Study. Chemphyschem 2011; 13:323-9. [DOI: 10.1002/cphc.201100558] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 09/27/2011] [Indexed: 11/09/2022]
|
40
|
Galano A, Alvarez-Idaboy JR, Francisco-Márquez M. Physicochemical Insights on the Free Radical Scavenging Activity of Sesamol: Importance of the Acid/Base Equilibrium. J Phys Chem B 2011; 115:13101-9. [DOI: 10.1021/jp208315k] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340, México D. F. México
| | - Juan Raúl Alvarez-Idaboy
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340, México D. F. México
- Facultad de Química, Departamento de Física y Química Teórica, Universidad Nacional Autónoma de México, México DF 04510, México
| | - Misaela Francisco-Márquez
- UPIICSA, Instituto Politécnico Nacional, Té 950, Col. Granjas México, C. P. 08400, México D. F. México
| |
Collapse
|
41
|
Long B, Tan XF, Long ZW, Wang YB, Ren DS, Zhang WJ. Theoretical Studies on Reactions of the Stabilized H2COO with HO2 and the HO2···H2O Complex. J Phys Chem A 2011; 115:6559-67. [DOI: 10.1021/jp200729q] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Bo Long
- College of Computer and Information Engineering, Guizhou University for Nationalities, Guiyang, China 550025
| | - Xing-feng Tan
- College of Photo-Electronics, Chongqing University of Posts and Telecommunications, Chongqing, China 400065
| | | | | | - Da-sen Ren
- College of Computer and Information Engineering, Guizhou University for Nationalities, Guiyang, China 550025
| | - Wei-jun Zhang
- Laboratory of Environment Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China 230031
| |
Collapse
|
42
|
Iuga C, Alvarez-Idaboy JR, Vivier-Bunge A. Mechanism and Kinetics of the Water-Assisted Formic Acid + OH Reaction under Tropospheric Conditions. J Phys Chem A 2011; 115:5138-46. [DOI: 10.1021/jp201517p] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cristina Iuga
- Facultad de Química, Departamento de Física y Química Teórica, Universidad Nacional Autónoma de México, 04510 México D.F., Mexico
- Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana—Azcapotzalco, 02200 México D.F., Mexico
| | - J. Raul Alvarez-Idaboy
- Facultad de Química, Departamento de Física y Química Teórica, Universidad Nacional Autónoma de México, 04510 México D.F., Mexico
- Departamento de Química, Universidad Autónoma Metropolitana—Iztapalapa, 09340 México D.F., Mexico
| | - Annik Vivier-Bunge
- Departamento de Química, Universidad Autónoma Metropolitana—Iztapalapa, 09340 México D.F., Mexico
| |
Collapse
|
43
|
On the possible catalytic role of a single water molecule in the acetone + OH gas phase reaction: a theoretical pseudo-second-order kinetics study. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-0921-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
44
|
Iuga C, Alvarez-Idaboy JR, Vivier-Bunge A. Single water-molecule catalysis in the glyoxal+OH reaction under tropospheric conditions: Fact or fiction? A quantum chemistry and pseudo-second order computational kinetic study. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.10.043] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
45
|
Mardyukov A, Crespo-Otero R, Sanchez-Garcia E, Sander W. Photochemistry and Reactivity of the Phenyl Radical-Water System: A Matrix Isolation and Computational Study. Chemistry 2010; 16:8679-89. [DOI: 10.1002/chem.200903362] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
46
|
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.
Collapse
Affiliation(s)
- Aidee Vega-Rodriguez
- Facultad de Quimica, Departamento de Física y Química Teorica, Universidad Nacional Autonoma de Mexico, Mexico, DF, México
| | | |
Collapse
|
47
|
Trevitt AJ, Goulay F, Taatjes CA, Osborn DL, Leone SR. Reactions of the CN Radical with Benzene and Toluene: Product Detection and Low-Temperature Kinetics. J Phys Chem A 2009; 114:1749-55. [DOI: 10.1021/jp909633a] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Adam J. Trevitt
- Departments of Chemistry and Physics, and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, and Combustion Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California, Livermore, California 94551-0969
| | - Fabien Goulay
- Departments of Chemistry and Physics, and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, and Combustion Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California, Livermore, California 94551-0969
| | - Craig A. Taatjes
- Departments of Chemistry and Physics, and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, and Combustion Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California, Livermore, California 94551-0969
| | - David L. Osborn
- Departments of Chemistry and Physics, and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, and Combustion Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California, Livermore, California 94551-0969
| | - Stephen R. Leone
- Departments of Chemistry and Physics, and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, and Combustion Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, California, Livermore, California 94551-0969
| |
Collapse
|
48
|
Alvarez-Idaboy JR, Galano A. Counterpoise corrected interaction energies are not systematically better than uncorrected ones: comparison with CCSD(T) CBS extrapolated values. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0676-z] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
49
|
Noda J, Volkamer R, Molina MJ. Dealkylation of Alkylbenzenes: A Significant Pathway in the Toluene, o-, m-, p-Xylene + OH Reaction. J Phys Chem A 2009; 113:9658-66. [DOI: 10.1021/jp901529k] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun Noda
- Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, and Atmospheric Science, Department of Chemistry, University of Gothenburg, S-41296 Gothenburg, Sweden
| | - Rainer Volkamer
- Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, and Atmospheric Science, Department of Chemistry, University of Gothenburg, S-41296 Gothenburg, Sweden
| | - Mario J. Molina
- Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, and Atmospheric Science, Department of Chemistry, University of Gothenburg, S-41296 Gothenburg, Sweden
| |
Collapse
|
50
|
Glowacki DR, Wang L, Pilling MJ. Evidence of Formation of Bicyclic Species in the Early Stages of Atmospheric Benzene Oxidation. J Phys Chem A 2009; 113:5385-96. [DOI: 10.1021/jp9001466] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David R. Glowacki
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom, and School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China, 51640
| | - Liming Wang
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom, and School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China, 51640
| | - Michael J. Pilling
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom, and School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China, 51640
| |
Collapse
|