1
|
Zhang Y, Wang Z, Wang H, Cheng Y, Zhang T, Ou T, Wang R. Atmospheric Chemistry of NH 2SO 3H in Polluted Areas: An Unexpected Isomerization of NH 2SO 3H in Acid-Polluted Regions. J Phys Chem A 2023; 127:8935-8942. [PMID: 37844321 DOI: 10.1021/acs.jpca.3c04982] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
NH2SO3H is an effective nucleation agent for the formation of atmospheric aerosols and cloud particles. So, the ammonolysis of SO3 to form NH2SO3H without and with neutral (H2O) and basic (NH3) trace gases has been extensively investigated. However, the acidic trace gas X (X = H2SO4 and CH3SO3H)-assisted ammonolysis of SO3 is still up for debate. In this work, a comprehensive theoretical investigation of X-assisted ammonolysis of SO3 and its reverse reaction (the isomerization of NH2SO3H to form SO3-···NH3+) was carried out in the gas phase and at the air-water interface. The gas-phase results show that X-assisted isomerization of NH2SO3H to form SO3-···NH3+ is more energetically and kinetically favorable than its reverse reaction and the isomerization of NH2SO3H in the presence of H2O and NH3. Such unexpected findings revealed that gas-phase NH2SO3H is highly reactive in the presence of acidic trace gas in contrast to the high stability of NH2SO3H in neutral and basic conditions. At the air-water interface, the X-assisted isomerization reaction of NH2SO3H involves multiple water molecules. The loop structure of the reaction center (X···NH2SO3H···3H2O) promotes the transfer of protons in the water molecules to form the SO3-···NH3+ ion pair, which can then interact with several interfacial water molecules to form ammonium bisulfate. These interfacial reaction channels follow a stepwise mechanism and proceed at the picosecond time-scale. The findings of this study will contribute to a better understanding of the atmospheric behavior of NH2SO3H in polluted acidic trace gases.
Collapse
Affiliation(s)
- Yongqi Zhang
- Institute of Theoretical and Computational Chemistry, Shaanxi Key Laboratory of Catalysis, School of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, P. R. China
- National and Local Joint Biomedical Engineering Research Center on Photodynamic Technologies, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, P. R. China
| | - Zehui Wang
- Institute of Theoretical and Computational Chemistry, Shaanxi Key Laboratory of Catalysis, School of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, P. R. China
| | - Hui Wang
- Institute of Theoretical and Computational Chemistry, Shaanxi Key Laboratory of Catalysis, School of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, P. R. China
| | - Yang Cheng
- Institute of Theoretical and Computational Chemistry, Shaanxi Key Laboratory of Catalysis, School of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, P. R. China
| | - Tianlei Zhang
- Institute of Theoretical and Computational Chemistry, Shaanxi Key Laboratory of Catalysis, School of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, P. R. China
| | - Ting Ou
- Institute of Theoretical and Computational Chemistry, Shaanxi Key Laboratory of Catalysis, School of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, P. R. China
| | - Rui Wang
- Institute of Theoretical and Computational Chemistry, Shaanxi Key Laboratory of Catalysis, School of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, P. R. China
| |
Collapse
|
2
|
Huang JH, Zhang F, Shi YP, Cai JR, Chuang YH, Hu WP, Lee YY, Wang CC. Water Plays Multifunctional Roles in the Intervening Formation of Secondary Organic Aerosols in Ozonolysis of Limonene: A Valence Photoelectron Spectroscopy and Density Functional Theory Study. J Phys Chem Lett 2023; 14:3765-3776. [PMID: 37052309 DOI: 10.1021/acs.jpclett.3c00560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Although water may affect aqueous aerosol chemistry, how it intervenes in the formation of secondary organic aerosols (SOAs) at the molecular level remains elusive. Ozonolysis of limonene is one of the most important sources of indoor SOAs. Here, we report the valence electronic properties of limonene aerosols and SOAs derived from limonene ozonolysis (Lim-SOAs) via aerosol vacuum ultraviolet photoelectron spectroscopy, with a focus on the effects of water on Lim-SOAs. The first vertical ionization energy of limonene aerosols is measured to be 8.79 ± 0.07 eV. While water significantly increases the total photoelectron yield of Lim-SOAs, three photoelectron features attributable to Lim-SOAs each exhibit distinct dependence on the fraction of water in aerosols, implying that different formation pathways and molecular origins are involved in the formation of Lim-SOAs. Combined with density functional theory calculation and mass spectrometry measurements, this study reveals that water, particularly the water dimer, enhances the formation of Lim-SOAs by altering the ozonolysis energetics and pathways by intervening in its Criegee chemistry, acting as both a catalyst and a reactant. The atmospheric implication is discussed.
Collapse
Affiliation(s)
- Jhih-Hong Huang
- Department of Chemistry and Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.C. 80424
| | - Fuyi Zhang
- Department of Chemistry and Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.C. 80424
| | - Yan-Pin Shi
- Department of Chemistry and Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.C. 80424
| | - Jia-Rong Cai
- Department of Chemistry and Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.C. 80424
| | - Yu-Hsuan Chuang
- Department of Chemistry and Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.C. 80424
| | - Wei-Ping Hu
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chiayi, Taiwan, R.O.C. 62102
| | - Yin-Yu Lee
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan, R.O.C. 30076
| | - Chia C Wang
- Department of Chemistry and Aerosol Science Research Center, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.C. 80424
| |
Collapse
|
3
|
Pang H, Wang Y, Wu Y, He J, Deng H, Li P, Xu J, Yu Z, Gligorovski S. Unveiling the pH-Dependent Yields of H 2O 2 and OH by Aqueous-Phase Ozonolysis of m-Cresol in the Atmosphere. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:7618-7628. [PMID: 35608856 DOI: 10.1021/acs.est.1c08962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Hydrogen peroxide (H2O2) and hydroxyl radical (OH) are important oxidants in the atmospheric aqueous phase such as cloud droplets and deliquescent aerosol particles, playing a significant role in the chemical transformation of organic and inorganic pollutants in the atmosphere. Atmospheric aqueous-phase chemistry has been considered to be a source of H2O2 and OH. However, our understanding of the mechanisms of their formation in atmospheric waters is still incomplete. Here, we show that the aqueous-phase reaction of dissolved ozone (O3) with substituted phenols such as m-cresol represents an important source of H2O2 and OH exhibiting pH-dependent yields. Intriguingly, the formation of H2O2 through the ring-opening mechanism is strongly promoted under lower pH conditions (pH 2.5-3.5), while higher pH favors the ring-retaining pathways yielding OH. The rate constant of the reaction of O3 with m-cresol increases with increasing pH. The reaction products formed during the ozonolysis of m-cresol are analyzed by an Orbitrap mass spectrometer, and reaction pathways are suggested based on the identified product compounds. This study indicates that aqueous-phase ozonolysis of phenolic compounds might be an alternative source of H2O2 and OH in the cloud, rain, and liquid water of aerosol particles; thus, it should be considered in future model studies.
Collapse
Affiliation(s)
- Hongwei Pang
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Center for Excellence in Deep Earth Science, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Yiqun Wang
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yang Wu
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Center for Excellence in Deep Earth Science, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Jiazhuo He
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Center for Excellence in Deep Earth Science, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Huifan Deng
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pan Li
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinli Xu
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhiqiang Yu
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Center for Excellence in Deep Earth Science, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Sasho Gligorovski
- State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Center for Excellence in Deep Earth Science, Chinese Academy of Sciences, Guangzhou 510640, China
| |
Collapse
|
4
|
Hu M, Qiu J, Tonokura K, Enami S. Aqueous-phase fates of α-alkoxyalkyl-hydroperoxides derived from the reactions of Criegee intermediates with alcohols. Phys Chem Chem Phys 2021; 23:4605-4614. [PMID: 33620039 DOI: 10.1039/d0cp06308h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In the atmosphere, carbonyl oxides known as Criegee intermediates are produced mainly by ozonolysis of volatile organic compounds containing C[double bond, length as m-dash]C double bonds, such as biogenic terpenoids. Criegee intermediates can react with OH-containing species to produce labile organic hydroperoxides (ROOHs) that are taken up into atmospheric condensed phases. Besides water, alcohols are an important reaction partner of Criegee intermediates and can convert them into α-alkoxyalkyl-hydroperoxides (α-AHs), R1R2C(-OOH)(-OR'). Here, we report a study on the aqueous-phase fates of α-AHs derived from ozonolysis of α-terpineol in the presence of methanol, ethanol, 1-propanol, and 2-propanol. The α-terpineol α-AHs and the decomposition products were detected as their chloride adducts by electrospray mass spectrometry as a function of reaction time. Our discovery that the rate of decomposition of α-AHs increased as the pH decreased from 5.9 to 3.8 implied that the decomposition mechanism was catalyzed by H+. The use of isotope solvent experiments revealed that a primary decomposition product of α-AHs in an acidic aqueous solution was a hemiacetal R1R2C(-OH)(-OR') species that was further transformed into other products such as lactols. The proposed H+-catalyzed decomposition of α-AHs, which provides H2O2 and multifunctional species in ambient aerosol particles, may be faster than other degradation processes (e.g., photolysis by solar radiation).
Collapse
Affiliation(s)
- Mingxi Hu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Junting Qiu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Kenichi Tonokura
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Shinichi Enami
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan.
| |
Collapse
|
5
|
Wei J, Fang T, Wong C, Lakey PSJ, Nizkorodov SA, Shiraiwa M. Superoxide Formation from Aqueous Reactions of Biogenic Secondary Organic Aerosols. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:260-270. [PMID: 33352036 DOI: 10.1021/acs.est.0c07789] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Reactive oxygen species (ROS) play a central role in aqueous-phase processing and health effects of atmospheric aerosols. Although hydroxyl radical (•OH) and hydrogen peroxide (H2O2) are regarded as major oxidants associated with secondary organic aerosols (SOA), the kinetics and reaction mechanisms of superoxide (O2•-) formation are rarely quantified and poorly understood. Here, we demonstrate a dominant formation of O2•- with molar yields of 0.01-0.03% from aqueous reactions of biogenic SOA generated by •OH photooxidation of isoprene, β-pinene, α-terpineol, and d-limonene. The temporal evolution of •OH and O2•- formation is elucidated by kinetic modeling with a cascade of aqueous reactions including the decomposition of organic hydroperoxides, •OH oxidation of primary or secondary alcohols, and unimolecular decomposition of α-hydroxyperoxyl radicals. Relative yields of various types of ROS reflect a relative abundance of organic hydroperoxides and alcohols contained in SOA. These findings and mechanistic understanding have important implications on the atmospheric fate of SOA and particle-phase reactions of highly oxygenated organic molecules as well as oxidative stress upon respiratory deposition.
Collapse
Affiliation(s)
- Jinlai Wei
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Ting Fang
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Cynthia Wong
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Pascale S J Lakey
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Sergey A Nizkorodov
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Manabu Shiraiwa
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| |
Collapse
|
6
|
Hu M, Chen K, Qiu J, Lin YH, Tonokura K, Enami S. Temperature Dependence of Aqueous-Phase Decomposition of α-Hydroxyalkyl-Hydroperoxides. J Phys Chem A 2020; 124:10288-10295. [PMID: 33231452 DOI: 10.1021/acs.jpca.0c09862] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Ozonolysis of unsaturated organic species with water produces α-hydroxyalkyl-hydroperoxides (α-HHs), which are reactive intermediates that lead to the formation of H2O2 and multifunctionalized species in atmospheric condensed phases. Here, we report temperature-dependent rate coefficients (k) for the aqueous-phase decomposition of α-terpineol α-HHs at 283-318 K and terpinen-4-ol α-HHs at 313-328 K. The temporal profiles of α-HH signals, detected as chloride adducts by negative-ion electrospray mass spectrometry, showed single-exponential decay, and the derived first-order k for α-HH decomposition increased as temperature increased, e.g., k(288 K) = (4.7 ± 0.2) × 10-5, k(298 K) = (1.5 ± 0.4) × 10-4, k(308 K) = (3.4 ± 0.9) × 10-4, k(318 K) = (1.0 ± 0.2) × 10-3 s-1 for α-terpineol α-HHs at pH 6.1. Arrhenius plot analysis yielded activation energies of 17.9 ± 0.7 (pH 6.1) and 17.1 ± 0.2 kcal mol-1 (pH 6.2) for the decomposition of α-terpineol and terpinen-4-ol α-HHs, respectively. Activation energies of 18.6 ± 0.2 and 19.2 ± 0.5 kcal mol-1 were also obtained for the decomposition of α-terpineol α-HHs in acidified water at pH 5.3 and 4.5, respectively. Theoretical kinetic and thermodynamic calculations confirmed that both water-catalyzed and proton-catalyzed mechanisms play important roles in the decomposition of these α-HHs. The relatively strong temperature dependence of k suggests that the lifetime of these α-HHs in aqueous phases (e.g., aqueous aerosols, fog, cloud droplets, wet films) is controlled not only by the water content and pH but also by the temperature of these media.
Collapse
Affiliation(s)
- Mingxi Hu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Kunpeng Chen
- Department of Environmental Sciences, University of California, Riverside, California 92521, United States
| | - Junting Qiu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Ying-Hsuan Lin
- Department of Environmental Sciences, University of California, Riverside, California 92521, United States
| | - Kenichi Tonokura
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Shinichi Enami
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| |
Collapse
|
7
|
Qiu J, Tonokura K, Enami S. Proton-Catalyzed Decomposition of α-Hydroxyalkyl-Hydroperoxides in Water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:10561-10569. [PMID: 32786584 DOI: 10.1021/acs.est.0c03438] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In the atmosphere, most biogenic terpenes undergo ozonolysis in the presence of water to form reactive α-hydroxyalkyl-hydroperoxides (α-HHs), and the lifetimes of these α-HHs are a key parameter for understanding the processes that occur during the aging of atmospheric particles. We previously reported that α-HHs generated by ozonolysis of terpenes decompose in water to give H2O2 and the corresponding aldehydes, which undergo hydration to form gem-diols. Herein, we report that this decomposition process was dramatically accelerated by acidification of the water with oxalic, acetic, hexanoic, cis-pinonic, or hydrochloric acid. In acidic solution, the temporal profiles of the α-HHs, detected as their chloride adducts by electrospray mass spectrometry, showed single-exponential decays in the pH range from 4.1 to 6.1, and the first-order rate coefficients (k) for the decays increased with decreasing pH. The lifetime of the α-HH derived from α-terpineol was 128 min (k = (1.3 ± 0.4) × 10-4 s-1) at pH 6.1 but only 8 min (k = (2.1 ± 0.1) × 10-3 s-1) at pH 4.1. Because the rate coefficients increased as the pH decreased and the increase depended on pH rather than on the properties of the acid, we propose that the decomposition of the α-HHs in water was specifically catalyzed by H+. Fast H+-catalyzed decomposition of α-HHs could be an important source of H2O2 and multifunctionalized compounds found in ambient atmospheric particles.
Collapse
Affiliation(s)
- Junting Qiu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Kenichi Tonokura
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Shinichi Enami
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| |
Collapse
|
8
|
Zeng M, Wilson KR. Efficient Coupling of Reaction Pathways of Criegee Intermediates and Free Radicals in the Heterogeneous Ozonolysis of Alkenes. J Phys Chem Lett 2020; 11:6580-6585. [PMID: 32787230 DOI: 10.1021/acs.jpclett.0c01823] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In the gas phase, ozonolysis of olefins is known to be a significant source of free radicals. However, for heterogeneous and condensed phase ozone reactions, the importance of reaction pathways that couple Criegee intermediates (CI) with hydroxyl (OH), alkoxy, and peroxy free radicals remains uncertain. Here we report experimental evidence for substantial free radical oxidation during the heterogeneous reaction of O3 with cis-9-tricosene (Tri) aerosol. A kinetic model with three coupled submechanisms that include O3, CI, and free radical reactions is used to explain how the observed Tri reactivity and its product distributions depend upon [O3], [OH], and the presence of CI scavengers. During multiphase ozonolysis, the kinetic model predicts that only ∼30% of the alkene is actually consumed by O3, while the remaining ∼70% is consumed by free radicals that cycle through pathways involving CI. These results reveal the importance of free radical oxidation during heterogeneous ozonolysis, which has been previously difficult to isolate due to the complex coupling of CI and OH reaction pathways.
Collapse
Affiliation(s)
- Meirong Zeng
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kevin R Wilson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|
9
|
Lakmuang C, Kroeger AA, Karton A. Criegee intermediate decomposition pathways for the formation of o-toluic acid and 2-methylphenylformate. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
10
|
Romeo I, Parise A, Galano A, Russo N, Alvarez-Idaboy JR, Marino T. The Antioxidant Capability of Higenamine: Insights from Theory. Antioxidants (Basel) 2020; 9:E358. [PMID: 32344940 PMCID: PMC7278810 DOI: 10.3390/antiox9050358] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/21/2020] [Accepted: 04/23/2020] [Indexed: 12/14/2022] Open
Abstract
Density functional theory was employed to highlight the antioxidant working mechanism of higenamine in aqueous and lipid-like environments. Different reaction mechanisms were considered for the reaction of higenamine with the •OOH radical. The pH values and the molar fraction at physiological pH were determined in aqueous solution. The results show that the preferred reaction mechanism was the hydrogen atom transfer from the catecholic ring. The computed kinetic constants revealed that, in order to obtain reliable results, it is important to consider all the species present in water solution derived from acid-base equilibria. From the present investigation, it emerges that at physiological pH (7.4), the scavenging activity of higenamine against the •OOH radical is higher than that of Trolox, chosen as a reference antioxidant. Furthermore, higenamine results to be more efficient for that purpose than melatonin and caffeine, whose protective action against oxidative stress is frequently associated with their reactive oxygen species (ROS) scavenging activity.
Collapse
Affiliation(s)
- Isabella Romeo
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende, Italy; (I.R.); (A.P.)
| | - Angela Parise
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende, Italy; (I.R.); (A.P.)
| | - Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Ciudad de México 09340, Mexico;
| | - Nino Russo
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende, Italy; (I.R.); (A.P.)
| | - Juan Raúl Alvarez-Idaboy
- Facultad de Química, Departamento de Física y Química Teórica, Universidad Nacional Autónoma de México, Ciudad de Mexico 04510, Mexico;
| | - Tiziana Marino
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende, Italy; (I.R.); (A.P.)
| |
Collapse
|
11
|
Evidence that Criegee intermediates drive autoxidation in unsaturated lipids. Proc Natl Acad Sci U S A 2020; 117:4486-4490. [PMID: 32071215 DOI: 10.1073/pnas.1920765117] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Autoxidation is an autocatalytic free-radical chain reaction responsible for the oxidative destruction of organic molecules in biological cells, foods, plastics, petrochemicals, fuels, and the environment. In cellular membranes, lipid autoxidation (peroxidation) is linked with oxidative stress, age-related diseases, and cancers. The established mechanism of autoxidation proceeds via H-atom abstraction through a cyclic network of peroxy-hydroperoxide-mediated free-radical chain reactions. For a series of model unsaturated lipids, we present evidence for an autoxidation mechanism, initiated by hydroxyl radical (OH) addition to C=C bonds and propagated by chain reactions involving Criegee intermediates (CIs). This mechanism leads to unexpectedly rapid autoxidation even in the presence of water, implying that as reactive intermediates, CI could play a much more prominent role in chemistries beyond the atmosphere.
Collapse
|
12
|
Ghoshal S, Pramanik A, Biswas S, Sarkar P. CH 3NO as a potential intermediate for early atmospheric HCN: a quantum chemical insight. Phys Chem Chem Phys 2019; 21:25126-25138. [PMID: 31691697 DOI: 10.1039/c9cp03874d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen cyanide (HCN) has played a central role in the production of several biological molecules under prebiotic conditions on primitive Earth. Previously, K. J. Zahnle (J. Geophys. Res.: Atmos., 1986, 91, 2819) and Tian et al. (Earth Planet. Sci. Lett., 2011, 308, 417) emphasized that HCN production in the early Earth's CH4-rich atmosphere could have been possible through the reaction between active nitrogen atoms (N) and methane photolysis products. Here, we have proposed alternative pathways for the formation of early atmospheric HCN via the decomposition of CH3NO as an intermediate. In the early Earth's O2-free atmosphere, CH3˙ could preferentially attach to NO, which was generated via early atmospheric volcanism or lightning and photochemical processes. We have quantum chemically explored both unimolecular and bimolecular decomposition pathways of CH3NO via the assistance of another CH3NO molecule and via H2O, NH3, HCl, HCOOH, HNO3 and H2SO4 catalysis. Both energetic and kinetic analyses reveal that H2SO4 is more efficient in this regard than other atmospheric species. Overall, it has been suggested that the proposed bimolecular decomposition pathways might have been alternative pathways for the formation of HCN under certain conditions on prebiotic Earth, while the unimolecular decomposition of CH3NO could lead to the formation of HCN in the high temperature volcanic environment on early Earth.
Collapse
Affiliation(s)
- Sourav Ghoshal
- Department of Chemistry, Visva-Bharati University, Santiniketan-731235, India.
| | - Anup Pramanik
- Department of Chemistry, Visva-Bharati University, Santiniketan-731235, India.
| | - Santu Biswas
- Department of Chemistry, Visva-Bharati University, Santiniketan-731235, India.
| | - Pranab Sarkar
- Department of Chemistry, Visva-Bharati University, Santiniketan-731235, India.
| |
Collapse
|
13
|
Qiu J, Ishizuka S, Tonokura K, Colussi AJ, Enami S. Water Dramatically Accelerates the Decomposition of α-Hydroxyalkyl-Hydroperoxides in Aerosol Particles. J Phys Chem Lett 2019; 10:5748-5755. [PMID: 31498633 PMCID: PMC6778917 DOI: 10.1021/acs.jpclett.9b01953] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 09/09/2019] [Indexed: 05/25/2023]
Abstract
α-Hydroxyalkyl-hydroperoxides (α-HHs), from the addition of water to Criegee intermediates in the ozonolysis of olefins, are reactive components of organic aerosols. Assessing the fate of α-HHs in such media requires information on the rates and products of their reactions in aqueous organic matrixes. This information, however, is unavailable due to the lack of analytical techniques for the detection and identification of labile α-HHs. Here, we report the mass spectrometric detection (as Cl- adducts) of the α-HH produced in the ozonolysis of a C15 diolefin in water (W):acetonitrile (AN) mixtures of variable composition containing inert NaCl. α-HH decays into a gem-diol + H2O2 within τ1/e ≈ 52 min in 50% (v:v) water, but persists longer than a day in ≤10% water mixtures. The strong nonlinear dependence of τ1/e on solvent composition reveals that water content is a major factor controlling the fate of α-HHs in atmospheric particles. It also suggests that α-HH decomposes while embedded in WnANm clusters rather than randomly dissolved in molecularly homogeneous W:AN mixtures.
Collapse
Affiliation(s)
- Junting Qiu
- Graduate
School of Frontier Sciences, The University
of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Shinnosuke Ishizuka
- National
Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| | - Kenichi Tonokura
- Graduate
School of Frontier Sciences, The University
of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Agustín J. Colussi
- Ronald
and Maxine Linde Center for Global Environmental Science, California Institute of Technology, Pasadena, California 91125, United States
| | - Shinichi Enami
- National
Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| |
Collapse
|
14
|
Francisco-Marquez M, Galano A. Detailed Investigation of the Outstanding Peroxyl Radical Scavenging Activity of Two Novel Amino-Pyridinol-Based Compounds. J Chem Inf Model 2019; 59:3494-3505. [PMID: 31264854 DOI: 10.1021/acs.jcim.9b00517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The ability of two novel amino-pyridinol based compounds (NPyr6 and NPyr7) as peroxyl radical scavengers was investigated in silico. The gathered data indicate that they are exceptionally efficient in that role. However, solvent polarity influences their relative efficiency for that purpose. NPyr6 was identified as the best peroxyl radical scavenger in lipid solution, while NPyr7 takes that place in aqueous solution. Both compounds present two acid-base equilibria, which influence their reactivity in aqueous solution. The associated pKa values were estimated. Several reaction mechanisms were explored. Hydrogen transfer from the phenolic group was identified as the chemical route with the highest contribution to the antioxidant behavior of the investigated compounds in both, nonpolar medium and aqueous solution (at 2 ≤ pH ≤ 10). At higher pH other reaction pathways become the most relevant ones. In addition, their bioavailability, cell permeability, safety, and manufacturability were evaluated. According to these, particularly toxicity, NPyr7 seems to be a better candidate for use as an oral drug to fight oxidative stress than NPyr6.
Collapse
Affiliation(s)
- Misaela Francisco-Marquez
- Instituto Politécnico Nacional-UPIICSA , Té 950, Col. Granjas México , C.P. 08400 México City , México
| | - Annia Galano
- Departamento de Química , Universidad Autónoma Metropolitana-Iztapalapa , San Rafael Atlixco 186, Col. Vicentina. Iztapalapa , C.P. 09340 , Mexico City , México
| |
Collapse
|
15
|
Zhao R, Kenseth CM, Huang Y, Dalleska NF, Kuang XM, Chen J, Paulson SE, Seinfeld JH. Rapid Aqueous-Phase Hydrolysis of Ester Hydroperoxides Arising from Criegee Intermediates and Organic Acids. J Phys Chem A 2018; 122:5190-5201. [DOI: 10.1021/acs.jpca.8b02195] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ran Zhao
- Devision of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Christopher M. Kenseth
- Devision of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Yuanlong Huang
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, United States
| | - Nathan F. Dalleska
- Environmental Analysis Center, California Institute of Technology, Pasadena, California 91125, United States
| | - Xiaobi M. Kuang
- Department of Atmospheric and Oceanic Sciences, University of California—Los Angeles, Los Angeles, California 90095, United States
| | - Jierou Chen
- Department of Atmospheric and Oceanic Sciences, University of California—Los Angeles, Los Angeles, California 90095, United States
| | - Suzanne E. Paulson
- Department of Atmospheric and Oceanic Sciences, University of California—Los Angeles, Los Angeles, California 90095, United States
| | - John H. Seinfeld
- Devision of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, California 91125, United States
| |
Collapse
|
16
|
Effect of ammonia-water complex on decomposition of carbonic acid in troposphere: A quantum chemical investigation. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.04.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
17
|
Mallick S, Sarkar S, Bandyopadhyay B, Kumar P. Effect of Ammonia and Formic Acid on the OH• + HCl Reaction in the Troposphere: Competition between Single and Double Hydrogen Atom Transfer Pathways. J Phys Chem A 2017; 122:350-363. [DOI: 10.1021/acs.jpca.7b09889] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Pradeep Kumar
- Department of Chemistry, MNIT Jaipur, Jaipur 302017, India
| |
Collapse
|
18
|
Würmel J, Simmie JM. H-Atom Abstraction Reactions by Ground-State Ozone from Saturated Oxygenates. J Phys Chem A 2017; 121:8053-8060. [DOI: 10.1021/acs.jpca.7b07760] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Würmel
- Galway Mayo Institute of Technology, Galway H91 T8NW, Ireland
| | - J. M. Simmie
- School
of Chemistry, National University of Ireland, Galway H91 TK33, Ireland
| |
Collapse
|
19
|
Wang L, Wang L. Mechanism of gas-phase ozonolysis of sabinene in the atmosphere. Phys Chem Chem Phys 2017; 19:24209-24218. [PMID: 28848955 DOI: 10.1039/c7cp03216a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sabinene is one of the monoterpenes of biogenic origin in the atmosphere. Ozonolysis is one of the important oxidation removal reactions for sabinene in the atmosphere during the daytime, leading to the formation of secondary organic aerosols. In this study, we investigate the mechanism of gas-phase ozonolysis of sabinene using quantum chemistry and kinetic calculations. The reaction starts with the formation of four primary ozonides (POZs), which decompose to primary product channels CH2OO + sabinaketone and CH2O + two Criegee intermediates (CI-1 and CI-2) with branching ratios of 17%, 45%, and 38%, respectively, at 298 K and 760 Torr. Calculations showed that the stabilized CI-1 would undergo a rapid intramolecular H-shift to a vinyl hydroperoxide (VHP) at a rate of ∼2700 s-1 followed by rapid decomposition to an OH radical and a vinoxy-type radical (VTR) and CI-2 would slowly isomerize to dioxirane at a rate of 0.97 s-1. In the atmosphere, CI-2 would instead react with water and the water dimer, forming α-hydroxyalkyl hydroperoxides (αHAHPs), which would decompose to sabinaketone and H2O2via heterogeneous processes. The reaction of CI-2 with SO2 would also be significant in a dry and cold atmosphere. The yield of sabinaketone of 47%, from primary POZ decomposition and secondary reactions of αHAHPs, agrees with the previously measured values of 35-50%. The OH radical, formed from CI-1, could reach 44%, agreeing with the previously reported value of (33 ± 6)%. Further reaction of the VTR radical would form highly-oxidized multifunctional products containing carboxylic and/or carbonyl groups which might contribute substantially to SOA formation.
Collapse
Affiliation(s)
- Lingyu Wang
- School of Chemistry & Chemical Engineering, South China University of Technology, 381 Wushan Rd., Guangzhou, 510640, China.
| | | |
Collapse
|
20
|
Pérez-González A, Alvarez-Idaboy JR, Galano A. Dual antioxidant/pro-oxidant behavior of the tryptophan metabolite 3-hydroxyanthranilic acid: a theoretical investigation of reaction mechanisms and kinetics. NEW J CHEM 2017. [DOI: 10.1039/c6nj03980d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Potent antioxidant in the absence of metal ions, responsible for the activity usually attributed to tryptophan. Pro-oxidant in the presence of metal ions; this effect increases with the pH.
Collapse
Affiliation(s)
| | - Juan Raúl Alvarez-Idaboy
- Facultad de Química
- Departamento de Física y Química Teórica
- Universidad Nacional Autónoma de México
- México DF 04510
- Mexico
| | - Annia Galano
- Departamento de Química
- Universidad Autónoma Metropolitana-Iztapalapa
- México D. F
- Mexico
| |
Collapse
|
21
|
Wei W, Monard G, Gauld J. Computational insights into substrate binding and catalytic mechanism of the glutaminase domain of glucosamine-6-phosphate synthase (GlmS). RSC Adv 2017. [DOI: 10.1039/c7ra04906d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The mechanistic cysteinyl of GlmS can activate its thiol using its own α-amine without the need for a bridging water.
Collapse
Affiliation(s)
- Wanlei Wei
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor
- Canada
| | - Gerald Monard
- Université de Lorraine
- UMR 7565 SRSMC
- F-54506 Vandoeuvre-les-Nancy
- France
| | - James W. Gauld
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor
- Canada
| |
Collapse
|
22
|
Espinoza C, Trigos Á, Medina ME. Theoretical Study on the Photosensitizer Mechanism of Phenalenone in Aqueous and Lipid Media. J Phys Chem A 2016; 120:6103-10. [DOI: 10.1021/acs.jpca.6b03615] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- César Espinoza
- Laboratorio
de Alta Tecnología de Xalapa, Universidad Veracruzana, Calle Medicos 5, Col. Unidad
del Bosque, 91010 Xalapa, Veracruz, México
| | - Ángel Trigos
- Laboratorio
de Alta Tecnología de Xalapa, Universidad Veracruzana, Calle Medicos 5, Col. Unidad
del Bosque, 91010 Xalapa, Veracruz, México
| | - Manuel E. Medina
- Centro
de Investigaciones Biomédicas, Universidad Veracruzana, Dr. Luis Castelazo Ayala
s/n, Col. Industrial las Animas, 91190 Xalapa, Veracruz, México
| |
Collapse
|
23
|
Wang DM, Long ZW, Tan XF, Long B, Zhang WJ. Theoretical Study on Gas Phase Reactions of OH Hydrogen-Abstraction from Formyl Fluoride with Different Catalysts. CHINESE J CHEM PHYS 2016. [DOI: 10.1063/1674-0068/29/cjcp1509187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|
24
|
Kumar M, Francisco JS. Red-Light Initiated Decomposition of α-Hydroxy Methylperoxy Radical in the Presence of Organic and Inorganic Acids: Implications for the HOx Formation in the Lower Stratosphere. J Phys Chem A 2016; 120:2677-83. [DOI: 10.1021/acs.jpca.6b01515] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manoj Kumar
- Department of Chemistry, University of Nebraska—Lincoln, 639 North 12th Street, Lincoln, Nebraska 68588, United States
| | - Joseph S. Francisco
- Department of Chemistry, University of Nebraska—Lincoln, 639 North 12th Street, Lincoln, Nebraska 68588, United States
| |
Collapse
|
25
|
|
26
|
Anthranilic acid as a secondary antioxidant: Implications to the inhibition of OH production and the associated oxidative stress. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2015.09.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
27
|
Bandyopadhyay B, Biswas P, Kumar P. Ammonia as an efficient catalyst for decomposition of carbonic acid: a quantum chemical investigation. Phys Chem Chem Phys 2016; 18:15995-6004. [DOI: 10.1039/c6cp02407f] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electronic structure calculations using M06-2X, MP2 and CCSD(T) methods have been employed to show ammonia as an efficient catalyst for decomposition of carbonic acid.
Collapse
Affiliation(s)
- Biman Bandyopadhyay
- Department of Chemistry
- Malaviya National Institute of Technology Jaipur
- Jaipur – 302017
- India
| | - Partha Biswas
- Department of Chemistry
- Scottish Church College
- Kolkata-700006
- India
| | - Pradeep Kumar
- Department of Chemistry
- Malaviya National Institute of Technology Jaipur
- Jaipur – 302017
- India
| |
Collapse
|
28
|
Villuendas-Rey Y, Alvarez-Idaboy JR, Galano A. Assessing the Protective Activity of a Recently Discovered Phenolic Compound against Oxidative Stress Using Computational Chemistry. J Chem Inf Model 2015; 55:2552-61. [PMID: 26624520 DOI: 10.1021/acs.jcim.5b00513] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The protection exerted by 3,5-dihydroxy-4-methoxybenzyl alcohol (DHMBA), a phenolic compound recently isolated from the Pacific oyster, against oxidative stress (OS) is investigated using the density functional theory. Our results indicate that DHMBA is an outstanding peroxyl radical scavenger, being about 15 times and 4 orders of magnitude better than Trolox for that purpose in lipid and aqueous media, respectively. It was also found to react faster with HOO(•) than other known antioxidants such as resveratrol and ascorbic acid. DHMBA is also predicted to be able to sequester Cu(II) ions, consequently inhibiting the OS induced by Cu(II)-ascorbate mixtures and downgrading the (•)OH production via the Haber-Weiss reaction. However, it is proposed that DHMBA is more efficient as a primary antioxidant (free radical scavenger), than as a secondary antioxidant (metal ion chelator). In addition, it was found that DHMBA can be efficiently regenerated in aqueous solution, at physiological pH. Such regeneration is expected to contribute to increase the antioxidant protection exerted by DHMBA. These results suggest that probably synthetic routes for this compound should be pursued, because albeit its abundance in nature is rather low, its antioxidant activity is exceptional.
Collapse
Affiliation(s)
- Yenny Villuendas-Rey
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa , San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P., 09340 México D. F., México
| | - Juan Raul Alvarez-Idaboy
- Departamento de Física y Química Teórica, Facultad de Química, Universidad Nacional Autónoma de México , México D. F. 04510, México
| | - Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa , San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P., 09340 México D. F., México
| |
Collapse
|
29
|
Ham JE, Jackson SR, Harrison JC, Wells J. Gas-phase reaction products and yields of terpinolene with ozone and nitric oxide using a new derivatization agent. ATMOSPHERIC ENVIRONMENT (OXFORD, ENGLAND : 1994) 2015; 122:520. [PMID: 31814795 PMCID: PMC6896996 DOI: 10.1016/j.atmosenv.2015.10.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The new derivatization agent, O-tert-butylhydroxylamine hydrochloride (TBOX) was used to investigate the carbonyl reaction products from terpinolene ozonolysis. With ozone (O3) as the limiting reagent, four carbonyl compounds were detected: methylglyoxal (MG), 4-methylcyclohex-3-en-1-one, (4MCH), 6-oxo-3-(propan-2-ylidene) heptanal (6OPH), and 3,6-dioxoheptanal (36DOH). The tricarbonyl 36DOH has not been previously observed. Using cyclohexane as a hydroxyl radical (OH•) scavenger, the yields of 6OPH and 36DOH were reduced indicating the influence secondary OH• radicals have on terpinolene ozonolysis products. However, the MG yield increased and the 4MCH yield was unchanged when OH•radicals were scavenged suggesting they are only made by the terpinolene + O3 reaction. The detection of 36DOH using TBOX highlights the advantages of a smaller molecular weight derivatization agent for the detection of multi-carbonyl compounds. The product yields from terpinolene ozonolysis experiments conducted in the presence of 20 ppb nitric oxide (NO) remained unchanged except for MG which decreased. However, in experiments where O3 was kept constant at 50 ppb and NO was varied (20, 50, 100 ppb) MG, 6OPH, 36DOH decreased with increasing NO while 4MCH increased with increasing NO. The use of TBOX derivatization if combined with other derivatization agents may address a recurring need to simply and accurately detect multi-functional oxygenated species in air.
Collapse
Affiliation(s)
- Jason E. Ham
- Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505, United States
| | - Stephen R. Jackson
- Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505, United States
| | - Joel C. Harrison
- Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505, United States
| | - J.R. Wells
- Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505, United States
| |
Collapse
|
30
|
Liu J, Fang S, Wang Z, Yi W, Tao FM, Liu JY. Hydrolysis of Sulfur Dioxide in Small Clusters of Sulfuric Acid: Mechanistic and Kinetic Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:13112-13120. [PMID: 26450714 DOI: 10.1021/acs.est.5b02977] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The deposition and hydrolysis reaction of SO2 + H2O in small clusters of sulfuric acid and water are studied by theoretical calculations of the molecular clusters SO2-(H2SO4)n-(H2O)m (m = 1,2; n = 1,2). Sulfuric acid exhibits a dramatic catalytic effect on the hydrolysis reaction of SO2 as it lowers the energy barrier by over 20 kcal/mol. The reaction with monohydrated sulfuric acid (SO2 + H2O + H2SO4 - H2O) has the lowest energy barrier of 3.83 kcal/mol, in which the cluster H2SO4-(H2O)2 forms initially at the entrance channel. The energy barriers for the three hydrolysis reactions are in the order SO2 + (H2SO4)-H2O > SO2 + (H2SO4)2-H2O > SO2 + H2SO4-H2O. Furthermore, sulfurous acid is more strongly bonded to the hydrated sulfuric acid (or dimer) clusters than the corresponding reactant (monohydrated SO2). Consequently, sulfuric acid promotes the hydrolysis of SO2 both kinetically and thermodynamically. Kinetics simulations have been performed to study the importance of these reactions in the reduction of atmospheric SO2. The results will give a new insight on how the pre-existing aerosols catalyze the hydrolysis of SO2, leading to the formation and growth of new particles.
Collapse
Affiliation(s)
- Jingjing Liu
- Institute of Theoretical Chemistry, Jilin University , Changchun 130023, People's Republic of China
| | - Sheng Fang
- Institute of Theoretical Chemistry, Jilin University , Changchun 130023, People's Republic of China
| | - Zhixiu Wang
- Institute of Theoretical Chemistry, Jilin University , Changchun 130023, People's Republic of China
| | - Wencai Yi
- Institute of Theoretical Chemistry, Jilin University , Changchun 130023, People's Republic of China
| | - Fu-Ming Tao
- Department of Chemistry and Biochemistry, California State University , Fullerton, California 92834, United States
| | - Jing-Yao Liu
- Institute of Theoretical Chemistry, Jilin University , Changchun 130023, People's Republic of China
| |
Collapse
|
31
|
Kumar M, Francisco JS. The Role of Catalysis in Alkanediol Decomposition: Implications for General Detection of Alkanediols and Their Formation in the Atmosphere. J Phys Chem A 2015; 119:9821-33. [DOI: 10.1021/acs.jpca.5b07642] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manoj Kumar
- Department of Chemistry, University of Nebraska—Lincoln, 639 North 12th Street, Lincoln, Nebraska 68588, United States
| | - Joseph S. Francisco
- Department of Chemistry, University of Nebraska—Lincoln, 639 North 12th Street, Lincoln, Nebraska 68588, United States
| |
Collapse
|
32
|
Rypkema HA, Sinha A, Francisco JS. Carboxylic Acid Catalyzed Hydration of Acetaldehyde. J Phys Chem A 2015; 119:4581-8. [DOI: 10.1021/jp510704j] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Heather A. Rypkema
- Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Amitabha Sinha
- Department
of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Joseph S. Francisco
- Department of Chemistry, H.C.
Brown Building, Purdue University, West Lafayette, Indiana 47906, United States
| |
Collapse
|
33
|
Álvarez-Diduk R, Galano A. Adrenaline and noradrenaline: protectors against oxidative stress or molecular targets? J Phys Chem B 2015; 119:3479-91. [PMID: 25646569 DOI: 10.1021/acs.jpcb.5b00052] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Density functional theory was used to investigate the potential role of neurotransmitters adrenaline and noradrenaline regarding oxidative stress. It is predicted that they can be efficient as free radical scavengers both in lipid and aqueous media, with the main reaction mechanism being the hydrogen transfer and the sequential proton loss electron transfer, respectively. Despite the polarity of the environment, adrenaline and noradrenaline react with (•)OOH faster than Trolox, which suggests that they are better peroxyl radical scavengers than the reference compound. Both catecholamines are also proposed to be capable of efficiently inhibiting the oxidative stress induced by copper(II)-ascorbate mixtures, and the (•)OH production via Haber-Weiss reaction, albeit the effects on the later are only partial. They exert such beneficial effects by sequestering Cu(II) ions. In summary, these catecholamines can be capable of reducing oxidative stress, by scavenging free radicals and by sequestering metal ions. However, at the same time they might lose their functions in the process due to the associated structural modifications. Consequently, adrenaline and noradrenaline can be considered as both protectors and molecular targets of oxidative stress. Fortunately, under the proper conditions, both catecholamines can be regenerated to their original form so their functions are restored.
Collapse
Affiliation(s)
- Ruslán Álvarez-Diduk
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa , San Rafael Atlixco 186, Col. Vicentina, Iztapalapa, C. P. 09340. México D.F., México
| | | |
Collapse
|
34
|
Kumar M, Busch DH, Subramaniam B, Thompson WH. Barrierless tautomerization of Criegee intermediates via acid catalysis. Phys Chem Chem Phys 2014; 16:22968-73. [DOI: 10.1039/c4cp03065f] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electronic structure calculations indicate that the organic acids catalyze the tautomerization of Criegee intermediates via a 1,4 β-hydrogen atom transfer to yield a vinyl hydroperoxide to such an extent that it becomes a barrierless process.
Collapse
Affiliation(s)
- Manoj Kumar
- Department of Chemistry
- University of Kansas
- Lawrence 66045, USA
- Center for Environmentally Beneficial Catalysis
- 1501 Wakarusa Drive
| | - Daryle H. Busch
- Department of Chemistry
- University of Kansas
- Lawrence 66045, USA
- Center for Environmentally Beneficial Catalysis
- 1501 Wakarusa Drive
| | - Bala Subramaniam
- Center for Environmentally Beneficial Catalysis
- 1501 Wakarusa Drive
- Lawrence, USA
- Department of Chemical and Petroleum Engineering
- University of Kansas
| | - Ward H. Thompson
- Department of Chemistry
- University of Kansas
- Lawrence 66045, USA
- Center for Environmentally Beneficial Catalysis
- 1501 Wakarusa Drive
| |
Collapse
|