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Kaiser R, Hasenbein J, Li Z. Kinetics Study of the Reactions of 4-Methyl-2-Pentanone and m-Ethyl Toluene with Hydroxyl Radicals between 240 and 340 K and 1–8 Torr Using the Relative Rate/Discharge Flow/Mass Spectrometry Technique. J Phys Chem A 2019; 123:6334-6341. [DOI: 10.1021/acs.jpca.9b01291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rachel Kaiser
- Department of Chemistry and Biochemistry, California State University Fullerton, Fullerton, California 92831, United States
| | - John Hasenbein
- Department of Chemistry and Biochemistry, California State University Fullerton, Fullerton, California 92831, United States
| | - Zhuangjie Li
- Department of Chemistry and Biochemistry, California State University Fullerton, Fullerton, California 92831, United States
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Phan M, Li Z. Kinetics Study of the Reactions of OH with n-Undecane and n-Dodecane Using the RR/DF/MS Technique. J Phys Chem A 2017; 121:3647-3654. [PMID: 28464606 DOI: 10.1021/acs.jpca.7b01512] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The kinetics of the reactions of hydroxyl radical with n-undecane (n-C11H24) and n-dodecane (n-C12H26) has been studied at 240-340 K and a total pressure of 1 Torr using the relative rate/discharge flow/mass spectrometry (RR/DF/MS) technique. The rate constants at 298 K for these reactions were determined to be kn-undecane+OH = (1.59 ± 0.24) × 10-11 cm3 molecule-1 s-1 and kn-dodecane+OH = (1.83 ± 0.26) × 10-11 cm3 molecule-1 s-1, respectively. The rate constants of these reactions were found to positively dependent on temperature at 277-340 K, and negatively dependent on temperature at 240-277 K. The atmospheric lifetime of these compounds are estimated to be 25.8 and 19.8 h for n-undecane and n-dodecane, respectively, based the kinetics results in the present study.
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Affiliation(s)
- Michael Phan
- Department of Chemistry and Biochemistry, California State University-Fullerton , Fullerton, California 92834, United States
| | - Zhuangjie Li
- Department of Chemistry and Biochemistry, California State University-Fullerton , Fullerton, California 92834, United States
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Cho J, Roueintan M, Li Z. Kinetic and Dynamic Investigations of OH Reaction with Styrene. J Phys Chem A 2014; 118:9460-70. [DOI: 10.1021/jp501380j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joeson Cho
- Department of Chemistry and
Biochemistry, California State University-Fullerton, Fullerton, California 92834, United States
| | - Masoud Roueintan
- Department of Chemistry and
Biochemistry, California State University-Fullerton, Fullerton, California 92834, United States
| | - Zhuangjie Li
- Department of Chemistry and
Biochemistry, California State University-Fullerton, Fullerton, California 92834, United States
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Roueintan MM, Cho J, Li Z. Kinetics Investigation of Reaction of Naphthalene with OH Radicals at 1-3 Torr and 240-340 K. INT J CHEM KINET 2014. [DOI: 10.1002/kin.20870] [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)
- Masoud M. Roueintan
- Department of Chemistry and Biochemistry; California State University Fullerton; Fullerton CA 92831
| | - Joeson Cho
- Department of Chemistry and Biochemistry; California State University Fullerton; Fullerton CA 92831
| | - Zhuangjie Li
- Department of Chemistry and Biochemistry; California State University Fullerton; Fullerton CA 92831
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Singh S, de Leon MF, Li Z. Kinetics study of the reaction of OH radicals with C5-C8 cycloalkanes at 240-340 K using the relative rate/discharge flow/mass spectrometry technique. J Phys Chem A 2013; 117:10863-72. [PMID: 24053620 DOI: 10.1021/jp406923d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Rate constants of reactions of hydroxyl radical with cyclopentane (k1), cyclohexane (k2), cycloheptane (k3), and cyclooctane (k4) have been acquired at 240-340 K and a total pressure of about 1 Torr using the technique of relative rate combined with discharge flow and mass spectrometry (RR/DF/MS). At 298 K, the rate constants are determined using two reference compounds, which are averaged to be k1 = (4.81 ± 0.88) × 10(-12), k2 = (6.41 ± 0.85) × 10(-12), k3 = (10.30 ± 1.44) × 10(-12), and k4 = (1.42 ± 0.27) × 10(-11) cm(3) molecule(-1) s(-1). The Arrhenius expressions at 240-340 K for these reactions are determined to be k1(T) = (2.43 ± 0.50) × 10(-11)exp[-(481 ± 58)/T], k2(T) = (3.96 ± 0.60) × 10(-11)exp[-554 ± 42)/T], k3(T) = (5.74 ± 0.66) × 10(-11)exp[-527 ± 33)/T], and k4(T) = (1.12 ± 0.21) × 10(-10)exp[-626 ± 53)/T]. Using the kcycloalkane+OH(277 K) values measured in the present work, the atmospheric lifetime for cyclopentane, cyclohexane, cycloheptane, and cyclooctane is estimated to be about 78, 64, 38, and 29 h, respectively.
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Affiliation(s)
- Sumitpal Singh
- Department of Chemistry and Biochemistry, California State University Fullerton , Fullerton, California 92834, United States
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Montenegro A, Ishibashi JSA, Lam P, Li Z. Kinetics Study of Reactions of α-Pinene and β-Pinene with Hydroxyl Radical at 1–8 Torr and 240–340 K Using the Relative Rate/Discharge Flow/Mass Spectrometry Method. J Phys Chem A 2012; 116:12096-103. [DOI: 10.1021/jp307718m] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Anthony Montenegro
- Department of Chemistry and Biochemistry, California State University—Fullerton, Fullerton,
California 92834, United States
| | - Jacob S. A. Ishibashi
- Department of Chemistry and Biochemistry, California State University—Fullerton, Fullerton,
California 92834, United States
| | - Phuong Lam
- Department of Chemistry and Biochemistry, California State University—Fullerton, Fullerton,
California 92834, United States
| | - Zhuangjie Li
- Department of Chemistry and Biochemistry, California State University—Fullerton, Fullerton,
California 92834, United States
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Crawford MA, Dang B, Hoang J, Li Z. Kinetic study of OH radical reaction with n
-heptane and n
-hexane at 240-340K using the relative rate/discharge flow/mass spectrometry (RR/DF/MS) technique. INT J CHEM KINET 2011. [DOI: 10.1002/kin.20574] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Mehta D, Nguyen A, Montenegro A, Li Z. A Kinetic Study of the Reaction of OH with Xylenes Using the Relative Rate/Discharge Flow/Mass Spectrometry Technique. J Phys Chem A 2009; 113:12942-51. [DOI: 10.1021/jp905074j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Deepali Mehta
- Department of Chemistry and Biochemistry, California State University—Fullerton, Fullerton, California 92834
| | - Andrew Nguyen
- Department of Chemistry and Biochemistry, California State University—Fullerton, Fullerton, California 92834
| | - Anthony Montenegro
- Department of Chemistry and Biochemistry, California State University—Fullerton, Fullerton, California 92834
| | - Zhuangjie Li
- Department of Chemistry and Biochemistry, California State University—Fullerton, Fullerton, California 92834
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Singh S, Li Z. Kinetics Investigation of OH Reaction with Isoprene at 240−340 K and 1−3 Torr Using the Relative Rate/Discharge Flow/Mass Spectrometry Technique. J Phys Chem A 2007; 111:11843-51. [DOI: 10.1021/jp074148h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Sumitpal Singh
- Department of Chemistry and Biochemistry, California State University Fullerton, Fullerton, California 92834
| | - Zhuangjie Li
- Department of Chemistry and Biochemistry, California State University Fullerton, Fullerton, California 92834
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Li Z, Singh S, Woodward W, Dang L. Kinetics study of OH radical reactions with n-octane, n-nonane, and n-decane at 240-340 K using the relative rate/discharge flow/mass spectrometry technique. J Phys Chem A 2007; 110:12150-7. [PMID: 17078610 DOI: 10.1021/jp0638134] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The kinetics of the reactions of hydroxyl radical with n-octane (k1), n-nonane (k2), and n-decane (k3) at 240-340 K and a total pressure of approximately 1 Torr has been studied using relative rate combined with discharge flow and mass spectrometer (RR/DF/MS) technique. The rate constant for these reactions was found to be positively dependent on temperature, with an Arrhenius expression of k1 = (2.27 +/- 0.21) x 10(-11)exp[(-296 +/- 27)/T], k2 = (4.35 +/- 0.49) x 10(-11)exp[(-411 +/- 32)/T], and k3 = (2.26 +/- 0.28) x 10(-11)exp[(-160 +/- 36)/T] cm3 molecule(-1) s(-1) (uncertainties taken as 2sigma), respectively. Our results are in good agreement with previous studies at and above room temperature using different techniques. Assuming that the reaction of alkane with hydroxyl radical is the predominant form for loss of these alkanes in the troposphere, the atmospheric lifetime for n-octane, n-nonane, and n-decane is estimated to be about 43, 35, and 28 h, respectively.
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Affiliation(s)
- Zhuangjie Li
- Department of Chemistry and Biochemistry, California State University Fullerton, Fullerton, California 92834, USA.
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Li Z, Nguyen P, de Leon MF, Wang JH, Han K, He GZ. Experimental and Theoretical Study of Reaction of OH with 1,3-Butadiene. J Phys Chem A 2006; 110:2698-708. [PMID: 16494381 DOI: 10.1021/jp0556557] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The kinetics of the reaction of hydroxyl radical with 1,3-butadiene at 240-340 K and a total pressure of approximately 1 Torr has been studied using relative rate combined with the discharge flow and mass spectrometer technique. The reaction dynamics of the same reaction has also been investigated using ab initio molecular orbital theory. The rate constant for this reaction was found to be negatively dependent on temperature, with an Arrhenius expression of k1 = (1.58 +/- 0.07) x 10(-11) exp[(436 +/- 13)/T] cm3 molecule(-1) s(-1) (uncertainties taken as 2sigma), which was in good agreement with that reported by Atkinson et al. and Liu et al. at 299-424 K. Mass spectral evidences were found for the addition of OH to both the terminal and the internal carbons of 1,3-butadiene. Our computational results suggest that both addition of OH to 1,3-butadiene and the abstraction of hydrogen atom from 1,3-butadiene by the OH radical are exothermic processes and that the addition of OH to the terminal carbon of the 1,3-butadiene is predicted to have an activation energy of 0.7 kcal mol(-1), being the most energetically favored reaction pathway.
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Affiliation(s)
- Zhuangjie Li
- Department of Chemistry and Biochemistry, California State University-Fullerton, Fullerton, California 92834, USA.
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Li Z, Pirasteh A. Kinetic study of the reactions of atomic chlorine with several volatile organic compounds at 240–340 K. INT J CHEM KINET 2006. [DOI: 10.1002/kin.20171] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Jena NR, Mishra PC. Mechanisms of Formation of 8-Oxoguanine Due To Reactions of One and Two OH• Radicals and the H2O2 Molecule with Guanine: A Quantum Computational Study. J Phys Chem B 2005; 109:14205-18. [PMID: 16852784 DOI: 10.1021/jp050646j] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mechanisms of formation of the mutagenic product 8-oxoguanine (8OG) due to reactions of guanine with two separate OH* radicals and with H2O2 were investigated at the B3LYP/6-31G, B3LYP/6-311++G, and B3LYP/AUG-cc-pVDZ levels of theory. Single point energy calculations were carried out with the MP2/AUG-cc-pVDZ method employing the optimized geometries at the B3LYP/AUG-cc-pVDZ level. Solvent effect was treated using the PCM and IEF-PCM models. Reactions of two separate OH* radicals and H2O2 with the C2 position of 5-methylimidazole (5MI) were investigated taking 5MI as a model to study reactions at the C8 position of guanine. The addition reaction of an OH* radical at the C8 position of guanine is found to be nearly barrierless while the corresponding adduct is quite stable. The reaction of a second OH* radical at the C8 position of guanine leading to the formation of 8OG complexed with a water molecule can take place according to two different mechanisms, involving two steps each. According to one mechanism, at the first step, 8-hydroxyguanine (8OHG) complexed with a water molecule is formed ,while at the second step, 8OHG is tautomerized to 8OG. In the other mechanism, at the first step, an intermediate complexed (IC) with a water molecule is formed, the five-membered ring of which is open, while at the second step, the five-membered ring is closed and a hydrogen bonded complex of 8OG with a water molecule is formed. The reaction of H2O2 with guanine leading to the formation of 8OG complexed with a water molecule can also take place in accordance with two different mechanisms having two steps each. At the first step of one mechanism, H2O2 is dissociated into two OH* groups that react with guanine to form the same IC as that formed in the reaction with two separate OH* radicals, and the subsequent step of this mechanism is also the same as that of the reaction of guanine with two separate OH* radicals. At the first step of the other mechanism of the reaction of guanine with H2O2, the latter molecule is dissociated into a hydrogen atom and an OOH* group which become bonded to the N7 and C8 atoms of guanine, respectively. At the second step of this mechanism, the OOH* group is dissociated into an oxygen atom and an OH* group, the former becomes bonded to the C8 atom of guanine while the latter abstracts the H8 atom bonded to C8, thus producing 8OG complexed with a water molecule. Solvent effects of the aqueous medium on certain reaction barriers and released energies are appreciable. 5MI works as a satisfactory model for a qualitative study of the reactions of two separate OH* radicals or H2O2 occurring at the C8 position of guanine.
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Affiliation(s)
- N R Jena
- Department of Physics, Banaras Hindu University, Varanasi-221005, India
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Crawford MA, Li Z, Heuerman HA, Kinscherff D. A kinetic and product study of reaction of chlorine atom with CH3CH2OD. INT J CHEM KINET 2004. [DOI: 10.1002/kin.20025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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