1
|
Yu W, Zheng X, Tan M, Wang J, Wu B, Ma J, Pan Y, Chen B, Chu C. Field Quantification of Hydroxyl Radicals by Flow-Injection Chemiluminescence Analysis with a Portable Device. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:2808-2816. [PMID: 38227742 DOI: 10.1021/acs.est.3c09140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Hydroxyl radical (•OH) is a powerful oxidant abundantly found in nature and plays a central role in numerous environmental processes. On-site detection of •OH is highly desirable for real-time assessments of •OH-centered processes and yet is restrained by a lack of an analysis system suitable for field applications. Here, we report the development of a flow-injection chemiluminescence analysis (FIA-CL) system for the continuous field detection of •OH. The system is based on the reaction of •OH with phthalhydrazide to generate 5-hydroxy-2,3-dihydro-1,4-phthalazinedione, which emits chemiluminescence (CL) when oxidatively activated by H2O2 and Cu3+. The FIA-CL system was successfully validated using the Fenton reaction as a standard •OH source. Unlike traditional absorbance- or fluorescence-based methods, CL detection could minimize interference from an environmental medium (e.g., organic matter), therefore attaining highly sensitive •OH detection (limits of detection and quantification = 0.035 and 0.12 nM, respectively). The broad applications of FIA-CL were illustrated for on-site 24 h detection of •OH produced from photochemical processes in lake water and air, where the temporal variations on •OH productions (1.0-12.2 nM in water and 1.5-37.1 × 107 cm-3 in air) agreed well with sunlight photon flux. Further, the FIA-CL system enabled field 24 h field analysis of •OH productions from the oxidation of reduced substances triggered by tidal fluctuations in coastal soils. The superior analytical capability of the FIA-CL system opens new opportunities for monitoring •OH dynamics under field conditions.
Collapse
Affiliation(s)
- Wanchao Yu
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Xiaoshan Zheng
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Mengxi Tan
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Jingyi Wang
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Binbin Wu
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Junye Ma
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Yishuai Pan
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Baoliang Chen
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Chiheng Chu
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
- ZJU-Anqing Yangtze Delta Future Industry Institute, Anqing 246003, China
| |
Collapse
|
2
|
Deal A, Smith AE, Oyala KM, Campolo GH, Rugeley BE, Mose TA, Talley DL, Cooley CB, Rapf RJ. Infrared Reflection-Absorption Spectroscopy of α-Keto Acids at the Air-Water Interface: Effects of Chain Length and Headgroup on Environmentally Relevant Surfactant Films. J Phys Chem A 2023; 127:4137-4151. [PMID: 37103984 PMCID: PMC10184673 DOI: 10.1021/acs.jpca.3c01266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/12/2023] [Indexed: 04/28/2023]
Abstract
A variety of organic surfactants are found at air-water interfaces in natural environments, including on the surfaces of aqueous aerosols. The structure and morphology of these organic films can have profound impacts on material transfer between the gas and condensed phases, the optical properties of atmospheric aerosol, and chemical processing at air-water interfaces. Combined, these effects can have significant impacts on climate via radiative forcing, but our understanding of organic films at air-water interfaces is incomplete. Here, we examine the impact of the polar headgroup and alkyl tail length on the structure and morphology of organic monolayers at the air-water interfaces. First, we focus on the substituted carboxylic acids, α-keto acids, using Langmuir isotherms and infrared reflection absorption spectroscopy (IR-RAS) to elucidate key structures and phase behaviors of α-keto acids with a range of surface activities. We show that the structure of α-keto acids, both soluble and insoluble, at water surfaces is a compromise between van der Waals interactions of the hydrocarbon tail and hydrogen bonding interactions involving the polar headgroup. Then, we use this new data set regarding α-keto acid films at water surfaces to examine the role of the polar headgroup on organic films using a similar substituted carboxylic acid (α-hydroxystearic acid), an unsubstituted carboxylic acid (stearic acid), and an alcohol (stearyl alcohol). We show that the polar headgroup and its hydrogen bonding interactions can significantly affect the orientation of amphiphiles at air-water interfaces. Here, we provide side-by-side comparisons of Langmuir isotherms and IR-RA spectra for a set of environmentally relevant organic amphiphiles with a range of alkyl tail lengths and polar headgroup structures.
Collapse
Affiliation(s)
- Alexandra
M. Deal
- Department
of Chemistry and Cooperative Institute for Research in Environmental
Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Abigail E. Smith
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| | - Krista M. Oyala
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| | - Giovanna H. Campolo
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| | - Burgess E. Rugeley
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| | - Tim A. Mose
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| | - Denver L. Talley
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| | - Christina B. Cooley
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| | - Rebecca J. Rapf
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| |
Collapse
|
3
|
Deal AM, Vaida V. Infrared Reflection–Absorption Spectroscopy of α-Hydroxyacids at the Water–Air Interface. J Phys Chem A 2022; 126:8280-8294. [DOI: 10.1021/acs.jpca.2c04462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexandra M. Deal
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Veronica Vaida
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| |
Collapse
|
4
|
Numadate N, Saito S, Nojima Y, Ishibashi TA, Enami S, Hama T. Direct Observation and Quantitative Measurement of OH Radical Desorption During the Ultraviolet Photolysis of Liquid Nonanoic Acid. J Phys Chem Lett 2022; 13:8290-8297. [PMID: 36073084 DOI: 10.1021/acs.jpclett.2c02199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Ultraviolet (UV) photolysis of fatty acid surfactants─which cover the surfaces of atmospheric liquid aerosols and are found in the oceans─such as nonanoic acid (NA) has recently been suggested as a source of hydroxyl (OH) radicals in the troposphere. We used laser-induced fluorescence to directly observe OH radicals desorbed from the surface of neat liquid NA as a primary photoproduct following 213 nm irradiation. The upper limit of photoreaction cross section for the OH radical desorption was estimated to be 9.0(4.1) × 10-22 cm2, which is only 1.2 ± 0.8% of the photoreaction cross section established for the photolysis of gas-phase acetic acid monomers. Vibrational sum-frequency generation spectroscopy for liquid NA revealed the hydrogen-bonded, cyclic, dimer structure of the NA molecules at the liquid surface. This dimerization can inhibit the formation of OH radicals and lead the present low photochemical reactivity of liquid NA.
Collapse
Affiliation(s)
- Naoki Numadate
- Komaba Institute for Science and Department of Basic Science, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8505, Japan
| | - Shota Saito
- Komaba Institute for Science and Department of Basic Science, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8505, Japan
| | - Yuki Nojima
- Department of Chemistry, Graduate School of Science and Technology, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Taka-Aki Ishibashi
- Department of Chemistry, Graduate School of Science and Technology, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Shinichi Enami
- National Institute for Environmental Studies, Tsukuba 305-8506, Japan
| | - Tetsuya Hama
- Komaba Institute for Science and Department of Basic Science, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8505, Japan
| |
Collapse
|
5
|
Yang Y, Wang G, Li X, Iradukunda Y, Liu F, Li Z, Gao H, Shi G. Preparation of Electrospun Active Molecules Membrane Application to Atmospheric Free Radicals. MEMBRANES 2022; 12:membranes12050480. [PMID: 35629806 PMCID: PMC9143268 DOI: 10.3390/membranes12050480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/27/2022] [Accepted: 04/27/2022] [Indexed: 12/04/2022]
Abstract
Atmospheric reactive oxygen species (ROS) play a key role in the process of air pollution and oxidative damage to organisms. The analysis of ROS was carried out by the capture-derivative method. Therefore, it is necessary to prepare an effective molecular membrane to trap and detect ROS. Electrospinning membranes were prepared by combining the electrospinning technique with chrysin, baicalein, scutellarin, genistein, quercetin, and baicalin. By comparing the structures of the membranes before and after the reaction, the fluorescence enhancement characteristics of the reactive molecular membranes and the atmospheric radicals were studied. The ability of the active molecular membranes to trap atmospheric radicals was also studied. It was found that the genistein active molecular membrane had good trapping ability in four environments. The fluorescence enhancement rates in ROS, OH radical and O3 simulated environments were 39.32%, 7.99% and 11.92%, respectively. The fluorescence enhancement rate in atmospheric environment was 16.16%. Indeed, the sites where the atmospheric radicals react with the active molecular membranes are discussed. It is found that it is mainly related to the 5,7 phenolic hydroxyl of ring A, catechol structure and the coexistence structure of 4′ phenolic hydroxyl of ring B and 7 phenolic hydroxyl of ring A. Therefore, the genistein molecular membrane has shown great potential in its trapping ability and it is also environmentally friendly.
Collapse
Affiliation(s)
- Yang Yang
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Guoying Wang
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
- Correspondence:
| | - Xin Li
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Yves Iradukunda
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
| | - Fengshuo Liu
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Zhiqian Li
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Hongli Gao
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Gaofeng Shi
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| |
Collapse
|
6
|
Interfacial Dark Aging Is an Overlooked Source of Aqueous Secondary Organic Aerosol. ATMOSPHERE 2022. [DOI: 10.3390/atmos13020188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this work, the relative yields of aqueous secondary organic aerosols (aqSOAs) at the air–liquid (a–l) interface are investigated between photochemical and dark aging using in situ time-of-flight secondary ion mass spectrometry (ToF-SIMS). Our results show that dark aging is an important source of aqSOAs despite a lack of photochemical drivers. Photochemical reactions of glyoxal and hydroxyl radicals (•OH) produce oligomers and cluster ions at the aqueous surface. Interestingly, different oligomers and cluster ions form intensely in the dark at the a–l interface, contrary to the notion that oligomer formation mainly depends on light irradiation. Furthermore, cluster ions form readily during dark aging and have a higher water molecule adsorption ability. This finding is supported by the observation of more frequent organic water cluster ion formation. The relative yields of water clusters in the form of protonated and hydroxide ions are presented using van Krevelen diagrams to explore the underlying formation mechanisms of aqSOAs. Large protonated and hydroxide water clusters (e.g., (H2O)nH+, 17 < n ≤ 44) have reasonable yields during UV aging. In contrast, small protonated and hydroxide water clusters (e.g., (H2O)nH+, 1 ≤ n ≤ 17) form after several hours of dark aging. Moreover, cluster ions have higher yields in dark aging, indicating the overlooked influence of dark aging interfacial products on aerosol optical properties. Molecular dynamic simulation shows that cluster ions form stably in UV and dark aging. AqSOAs molecules produced from dark and photochemical aging can enhance UV absorption of the aqueous surface, promote cloud condensation nuclei (CCN) activities, and affect radiative forcing.
Collapse
|
7
|
He L, Liang C, Ouyang Y, Li L, Guo Y, Zhang P, Li W. α-Functionalization of ketones promoted by sunlight and heterogeneous catalysis in the aqueous phase. Org Biomol Chem 2022; 20:790-795. [PMID: 34994749 DOI: 10.1039/d1ob02249k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Herein, a protocol that combines heterogeneous catalysis and solar photocatalysis for the regioselective α-substitution of asymmetric ketones with quinoxalinones has been reported. The result indicates that the reaction is more likely to occur on the α-carbon. This strategy provides a green and efficient way for the α-functionalization of ketones. A singlet oxygen involved mechanism is suggested for the transformation.
Collapse
Affiliation(s)
- Lei He
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Chenfeng Liang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Yani Ouyang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Lin Li
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Yirui Guo
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Pengfei Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Wanmei Li
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
| |
Collapse
|
8
|
Heazlewood BR. Quantum-State Control and Manipulation of Paramagnetic Molecules with Magnetic Fields. Annu Rev Phys Chem 2021; 72:353-373. [PMID: 33492979 DOI: 10.1146/annurev-physchem-090419-053842] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Since external magnetic fields were first employed to deflect paramagnetic atoms in 1921, a range of magnetic field-based methods have been introduced to state-selectively manipulate paramagnetic species. These methods include magnetic guides, which selectively filter paramagnetic species from all other components of a beam, and magnetic traps, where paramagnetic species can be spatially confined for extended periods of time. However, many of these techniques were developed for atomic-rather than molecular-paramagnetic species. It has proven challenging to apply some of these experimental methods developed for atoms to paramagnetic molecules. Thanks to the emergence of new experimental approaches and new combinations of existing techniques, the past decade has seen significant progress toward the manipulation and control of paramagnetic molecules. This review identifies the key methods that have been implemented for the state-selective manipulation of paramagnetic molecules-discussing the motivation, state of the art, and future prospects of the field. Key applications include the ability to control chemical interactions, undertake precise spectroscopic measurements, and challenge our understanding of chemical reactivity at a fundamental level.
Collapse
|
9
|
Studying Interfacial Dark Reactions of Glyoxal and Hydrogen Peroxide Using Vacuum Ultraviolet Single Photon Ionization Mass Spectrometry. ATMOSPHERE 2021. [DOI: 10.3390/atmos12030338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aqueous secondary organic aerosol (aqSOA) formation from volatile and semivolatile organic compounds at the air–liquid interface is considered as an important source of fine particles in the atmosphere. However, due to the lack of in situ detecting techniques, the detailed interfacial reaction mechanism and dynamics still remain uncertain. In this study, synchrotron-based vacuum ultraviolet single-photon ionization mass spectrometry (VUV SPI-MS) was coupled with the System for Analysis at the Liquid Vacuum Interface (SALVI) to investigate glyoxal dark oxidation products at the aqueous surface. Mass spectral analysis and determination of appearance energies (AEs) suggest that the main products of glyoxal dark interfacial aging are carboxylic acid related oligomers. Furthermore, the VUV SPI-MS results were compared and validated against those of in situ liquid time-of-flight secondary ion mass spectrometry (ToF-SIMS). The reaction mechanisms of the dark glyoxal interfacial oxidation, obtained using two different approaches, indicate that differences in ionization and instrument operation principles could contribute to their abilities to detect different oligomers. Therefore, the mechanistic differences revealed between the VUV SPI-MS and ToF-SIMS indicate that more in situ and real-time techniques are needed to investigate the contribution of the air–liquid interfacial reactions leading to aqSOA formation.
Collapse
|
10
|
Yu Y, Chen H, Zhao Q, Mou Q, Dong L, Wang R, Shi Z, Gao Y. Impact of Gas-Liquid Interface on Photochemical Vapor Generation. Anal Chem 2021; 93:3343-3352. [PMID: 33566589 DOI: 10.1021/acs.analchem.9b05634] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Interfacial effect has attracted increasing interest as the inherent asymmetric environment of a gas-liquid interface leads to different chemical and physical properties between this region and the bulk phase, resulting in enhanced chemical processes, specific reactions, and mass transfer at the interface. Photochemical vapor generation (PVG) is regarded as a simple and green sample introduction method in atomic spectrometry. However, the photochemical behavior of elements with the interface is not known. Herein, we report the PVG of elements at the gas-liquid interface along with a possible mechanism investigated for the first time. Enhancement and/or suppression effects from the gas-liquid interface were observed on the PVG of 17 elements, which was correlated with the properties of analytes and the generated intermediate substances/products of PVG and the applied conditions. Enhancement from 1.1- to 7.3-fold in analytical sensitivity was found for 12 elements in the system with gas-liquid interface(s) compared to the results obtained in previous reports of PVG using traditional flow injection with inductively coupled plasma mass spectrometry measurement. The introduction of gas-liquid interface(s) and the resultant elevated temperature inside the PVG reactor likely facilitated the generation of radicals, the subsequent radical-based reactions, and the separation/transport/detection of volatile species of elements. In contrast, intermediate substances/products generated in PVG with poor thermostability will readily decompose at elevated temperatures, leading to a decreased signal response of analytes. The finding is helpful to understand the transport of elements under UV irradiation in the environment and has potential for analysis of trace elements in environmental and biological samples.
Collapse
Affiliation(s)
- Ying Yu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Hanjiao Chen
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Qian Zhao
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Qing Mou
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Liang Dong
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Ruilin Wang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Zeming Shi
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Ying Gao
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, China
| |
Collapse
|
11
|
Kappes KJ, Deal AM, Jespersen MF, Blair SL, Doussin JF, Cazaunau M, Pangui E, Hopper BN, Johnson MS, Vaida V. Chemistry and Photochemistry of Pyruvic Acid at the Air–Water Interface. J Phys Chem A 2021; 125:1036-1049. [DOI: 10.1021/acs.jpca.0c09096] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Keaten J. Kappes
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Alexandra M. Deal
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Malte F. Jespersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Sandra L. Blair
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Jean-Francois Doussin
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Creteil, France
| | - Mathieu Cazaunau
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Creteil, France
| | - Edouard Pangui
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Creteil, France
| | - Brianna N. Hopper
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Matthew S. Johnson
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Veronica Vaida
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| |
Collapse
|
12
|
Hua J, Bian M, Ma T, Yang M, He W, Yang Z, Liu C, Fang Z, Guo K. The sunlight-promoted aerobic selective cyclization of olefinic amides and diselenides. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02273j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel sunlight-promoted approach for the selective synthesis of selenated iminoisobenzofurans or isoindolinones via the aerobic O-cyclization or N-cyclization of olefinic amides with diselenides has been developed.
Collapse
Affiliation(s)
- Jiawei Hua
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Mixue Bian
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Tao Ma
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Man Yang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Wei He
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Zhao Yang
- College of Engineering
- China Pharmaceutical University
- Nanjing 210003
- China
| | - ChengKou Liu
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
- State Key Laboratory of Materials-Oriented Chemical Engineering
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
- State Key Laboratory of Materials-Oriented Chemical Engineering
| |
Collapse
|
13
|
Zhang F, Yu X, Sui X, Chen J, Zhu Z, Yu XY. Evolution of aqSOA from the Air-Liquid Interfacial Photochemistry of Glyoxal and Hydroxyl Radicals. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:10236-10245. [PMID: 31361474 DOI: 10.1021/acs.est.9b03642] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The effect of photochemical reaction time on glyoxal and hydrogen peroxide at the air-liquid (a-l) interface is investigated using in situ time-of-flight secondary ion mass spectrometry (ToF-SIMS) enabled by a system for analysis at the liquid vacuum interface (SALVI) microreactor. Carboxylic acids are formed mainly by reaction with hydroxyl radicals in the initial reactions. Oligomers, cluster ions, and water clusters formed due to longer photochemistry. Our results provide direct molecular evidence that water clusters are associated with proton transfer and the formation of oligomers and cluster ions at the a-l interface. The oligomer formation is facilitated by water cluster and cluster ion formation over time. Formation of higher m/z oligomers and cluster ions indicates the possibility of highly oxygenated organic components formation at the a-l interface. Furthermore, new chemical reaction pathways, such as surface organic cluster, hydration shell, and water cluster formation, are proposed based on SIMS spectral observations, and the existing understanding of glyoxal photochemistry is expanded. Our in situ findings verify that the a-l interfacial reactions are important pathways for aqueous secondary organic aerosol (aqSOA) formation.
Collapse
Affiliation(s)
- Fei Zhang
- Department of Environmental Science & Engineering, Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) , Fudan University , Shanghai , 200433 , China
- Energy and Environment Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Xiaofei Yu
- Environmental and Molecular Science Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Xiao Sui
- Energy and Environment Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Jianmin Chen
- Department of Environmental Science & Engineering, Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) , Fudan University , Shanghai , 200433 , China
- Institute of Atmospheric Sciences , Fudan University , Shanghai , 200433 , China
| | - Zihua Zhu
- Environmental and Molecular Science Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| | - Xiao-Ying Yu
- Energy and Environment Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
| |
Collapse
|
14
|
Kroll JA, Frandsen BN, Rapf RJ, Kjaergaard HG, Vaida V. Reactivity of Electronically Excited SO2 with Alkanes. J Phys Chem A 2018; 122:7782-7789. [DOI: 10.1021/acs.jpca.8b04643] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Benjamin N. Frandsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | | | - Henrik G. Kjaergaard
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | | |
Collapse
|
15
|
Shrestha M, Luo M, Li Y, Xiang B, Xiong W, Grassian VH. Let there be light: stability of palmitic acid monolayers at the air/salt water interface in the presence and absence of simulated solar light and a photosensitizer. Chem Sci 2018; 9:5716-5723. [PMID: 30079180 PMCID: PMC6050592 DOI: 10.1039/c8sc01957f] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/04/2018] [Indexed: 01/13/2023] Open
Abstract
Long-chain fatty acid monolayers are known surfactants present at air/water interfaces. However, little is known about the stability of these long-chain fatty acid monolayers in the presence of solar radiation. Here we have investigated, for the first time, the stability of palmitic acid monolayers on salt water interfaces in the presence and absence of simulated solar light with and without a photosensitizer in the underlying salt subphase. Using surface sensitive probes to measure changes in the properties of these monolayers upon irradiation, we found that the monolayers become less stable in the presence of light and a photosensitizer, in this case humic acid, in the salt solution. The presence of the photosensitizer is essential in significantly reducing the stability of the monolayer upon irradiation. The mechanism for this loss of stability is due to interfacial photochemistry involving electronically excited humic acid and molecular oxygen reacting with palmitic acid at the interface to form more oxygenated and less surface-active species. These oxygenated species can then more readily partition into the underlying solution.
Collapse
Affiliation(s)
- Mona Shrestha
- Department of Chemistry & Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA .
| | - Man Luo
- Department of Chemistry & Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA .
| | - Yingmin Li
- Materials Science and Engineering Program , University of California , La Jolla , San Diego , CA 92093 , USA
| | - Bo Xiang
- Materials Science and Engineering Program , University of California , La Jolla , San Diego , CA 92093 , USA
| | - Wei Xiong
- Department of Chemistry & Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA .
- Materials Science and Engineering Program , University of California , La Jolla , San Diego , CA 92093 , USA
| | - Vicki H Grassian
- Department of Chemistry & Biochemistry , University of California , La Jolla , San Diego , CA 92093 , USA .
- Scripps Institution of Oceanography , University of California , La Jolla , San Diego , CA 92093 , USA
- Department of Nanoengineering , University of California , La Jolla , San Diego , CA 92093 , USA
| |
Collapse
|
16
|
Reed Harris AE, Cazaunau M, Gratien A, Pangui E, Doussin JF, Vaida V. Atmospheric Simulation Chamber Studies of the Gas-Phase Photolysis of Pyruvic Acid. J Phys Chem A 2017; 121:8348-8358. [DOI: 10.1021/acs.jpca.7b05139] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Allison E. Reed Harris
- Department
of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, Colorado 80309, United States
| | - Mathieu Cazaunau
- LISA,
UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, France
| | - Aline Gratien
- LISA,
UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, France
| | - Edouard Pangui
- LISA,
UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, France
| | - Jean-François Doussin
- LISA,
UMR-CNRS 7583, Université Paris Est Créteil (UPEC), Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, France
| | - Veronica Vaida
- Department
of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, Colorado 80309, United States
| |
Collapse
|
17
|
Rapf RJ, Dooley MR, Kappes K, Perkins RJ, Vaida V. pH Dependence of the Aqueous Photochemistry of α-Keto Acids. J Phys Chem A 2017; 121:8368-8379. [DOI: 10.1021/acs.jpca.7b08192] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Rebecca J. Rapf
- Department of Chemistry and
Biochemistry and Cooperative Institute for Research in Environmental
Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Michael R. Dooley
- Department of Chemistry and
Biochemistry and Cooperative Institute for Research in Environmental
Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Keaten Kappes
- Department of Chemistry and
Biochemistry and Cooperative Institute for Research in Environmental
Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Russell J. Perkins
- Department of Chemistry and
Biochemistry and Cooperative Institute for Research in Environmental
Sciences, University of Colorado, Boulder, Colorado 80309, United States
| | - Veronica Vaida
- Department of Chemistry and
Biochemistry and Cooperative Institute for Research in Environmental
Sciences, University of Colorado, Boulder, Colorado 80309, United States
| |
Collapse
|
18
|
Giorio C, Monod A, Brégonzio-Rozier L, DeWitt HL, Cazaunau M, Temime-Roussel B, Gratien A, Michoud V, Pangui E, Ravier S, Zielinski AT, Tapparo A, Vermeylen R, Claeys M, Voisin D, Kalberer M, Doussin JF. Cloud Processing of Secondary Organic Aerosol from Isoprene and Methacrolein Photooxidation. J Phys Chem A 2017; 121:7641-7654. [PMID: 28902512 PMCID: PMC5642272 DOI: 10.1021/acs.jpca.7b05933] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 09/02/2017] [Indexed: 11/30/2022]
Abstract
Aerosol-cloud interaction contributes to the largest uncertainties in the estimation and interpretation of the Earth's changing energy budget. The present study explores experimentally the impacts of water condensation-evaporation events, mimicking processes occurring in atmospheric clouds, on the molecular composition of secondary organic aerosol (SOA) from the photooxidation of methacrolein. A range of on- and off-line mass spectrometry techniques were used to obtain a detailed chemical characterization of SOA formed in control experiments in dry conditions, in triphasic experiments simulating gas-particle-cloud droplet interactions (starting from dry conditions and from 60% relative humidity (RH)), and in bulk aqueous-phase experiments. We observed that cloud events trigger fast SOA formation accompanied by evaporative losses. These evaporative losses decreased SOA concentration in the simulation chamber by 25-32% upon RH increase, while aqueous SOA was found to be metastable and slowly evaporated after cloud dissipation. In the simulation chamber, SOA composition measured with a high-resolution time-of-flight aerosol mass spectrometer, did not change during cloud events compared with high RH conditions (RH > 80%). In all experiments, off-line mass spectrometry techniques emphasize the critical role of 2-methylglyceric acid as a major product of isoprene chemistry, as an important contributor to the total SOA mass (15-20%) and as a key building block of oligomers found in the particulate phase. Interestingly, the comparison between the series of oligomers obtained from experiments performed under different conditions show a markedly different reactivity. In particular, long reaction times at high RH seem to create the conditions for aqueous-phase processing to occur in a more efficient manner than during two relatively short cloud events.
Collapse
Affiliation(s)
- Chiara Giorio
- Department
of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K.
- Aix
Marseille Univ, CNRS, LCE, Marseille, France
| | - Anne Monod
- Aix
Marseille Univ, CNRS, LCE, Marseille, France
| | - Lola Brégonzio-Rozier
- Laboratoire
Interuniversitaire des Systèmes Atmosphériques, UMR7583, CNRS, Université Paris-Est-Créteil
et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
| | | | - Mathieu Cazaunau
- Laboratoire
Interuniversitaire des Systèmes Atmosphériques, UMR7583, CNRS, Université Paris-Est-Créteil
et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
| | | | - Aline Gratien
- Laboratoire
Interuniversitaire des Systèmes Atmosphériques, UMR7583, CNRS, Université Paris-Est-Créteil
et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
| | - Vincent Michoud
- Laboratoire
Interuniversitaire des Systèmes Atmosphériques, UMR7583, CNRS, Université Paris-Est-Créteil
et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
| | - Edouard Pangui
- Laboratoire
Interuniversitaire des Systèmes Atmosphériques, UMR7583, CNRS, Université Paris-Est-Créteil
et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
| | | | | | - Andrea Tapparo
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Padova 35131, Italy
| | - Reinhilde Vermeylen
- Department
of Pharmaceutical Sciences, University of
Antwerp (Campus Drie Eiken), Universiteitsplein 1, BE-2610 Antwerp, Belgium
| | - Magda Claeys
- Department
of Pharmaceutical Sciences, University of
Antwerp (Campus Drie Eiken), Universiteitsplein 1, BE-2610 Antwerp, Belgium
| | - Didier Voisin
- Universités
Joseph Fourier-Grenoble 1, CNRS, UMR5183,
Laboratoire de Glaciologie et Géophysique de l’Environnement, 38402 Saint Martin
d’Hères, France
| | - Markus Kalberer
- Department
of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K.
| | - Jean-François Doussin
- Laboratoire
Interuniversitaire des Systèmes Atmosphériques, UMR7583, CNRS, Université Paris-Est-Créteil
et Université Paris Diderot, Institut Pierre Simon Laplace, Créteil, France
| |
Collapse
|
19
|
Affiliation(s)
- Russell Perkins
- University of Colorado Boulder, 215 UCB, Boulder, Colorado 80309, United States
| | - Veronica Vaida
- University of Colorado Boulder, 215 UCB, Boulder, Colorado 80309, United States
| |
Collapse
|
20
|
Rapf RJ, Perkins RJ, Yang H, Miyake GM, Carpenter BK, Vaida V. Photochemical Synthesis of Oligomeric Amphiphiles from Alkyl Oxoacids in Aqueous Environments. J Am Chem Soc 2017; 139:6946-6959. [PMID: 28481114 PMCID: PMC5518611 DOI: 10.1021/jacs.7b01707] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The aqueous phase photochemistry of a series of amphiphilic α-keto acids with differing linear alkyl chain lengths was investigated, demonstrating the ability of sunlight-initiated reactions to build molecular complexity under environmentally relevant conditions. We show that the photochemical reaction mechanisms for α-keto acids in aqueous solution are robust and generalizable across alkyl chain lengths. The organic radicals generated during photolysis are indiscriminate, leading to a large mixture of photoproducts that are observed using high-resolution electrospray ionization mass spectrometry, but these products are identifiable following literature photochemical mechanisms. The alkyl oxoacids under study here can undergo a Norrish Type II reaction to generate pyruvic acid, increasing the diversity of observed photoproducts. The major products of this photochemistry are covalently bonded dimers and trimers of the starting oxoacids, many of which are multi-tailed lipids. The properties of these oligomers are discussed, including their spontaneous self-assembly into aggregates.
Collapse
Affiliation(s)
- Rebecca J. Rapf
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Russell J. Perkins
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Haishen Yang
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Garret M. Miyake
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Barry K. Carpenter
- School of Chemistry and the Physical Organic Chemistry Centre, Cardiff University, Cardiff CF10 3AT, United Kingdom
| | - Veronica Vaida
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| |
Collapse
|
21
|
Reed Harris AE, Pajunoja A, Cazaunau M, Gratien A, Pangui E, Monod A, Griffith EC, Virtanen A, Doussin JF, Vaida V. Multiphase Photochemistry of Pyruvic Acid under Atmospheric Conditions. J Phys Chem A 2017; 121:3327-3339. [DOI: 10.1021/acs.jpca.7b01107] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Allison E. Reed Harris
- Department
of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, Colorado 80309, United States
| | - Aki Pajunoja
- Department
of Applied Physics, University of Eastern Finland, Kuopio Campus, P.O. Box 1627, 70211 Kuopio, Finland
| | - Mathieu Cazaunau
- LISA, UMR
CNRS 7583,
Université Paris Est Cretéil (UPEC), Université
Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), 94010 Cretéil, France
| | - Aline Gratien
- LISA, UMR
CNRS 7583,
Université Paris Est Cretéil (UPEC), Université
Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), 94010 Cretéil, France
| | - Edouard Pangui
- LISA, UMR
CNRS 7583,
Université Paris Est Cretéil (UPEC), Université
Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), 94010 Cretéil, France
| | - Anne Monod
- Aix Marseille
Université, CNRS, LCE, 13331, Marseille, France
| | - Elizabeth C. Griffith
- Department
of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, Colorado 80309, United States
| | - Annele Virtanen
- Department
of Applied Physics, University of Eastern Finland, Kuopio Campus, P.O. Box 1627, 70211 Kuopio, Finland
| | - Jean-Francois Doussin
- LISA, UMR
CNRS 7583,
Université Paris Est Cretéil (UPEC), Université
Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), 94010 Cretéil, France
| | - Veronica Vaida
- Department
of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, Colorado 80309, United States
| |
Collapse
|
22
|
Li S, Du L, Wei Z, Wang W. Aqueous-phase aerosols on the air-water interface: Response of fatty acid Langmuir monolayers to atmospheric inorganic ions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 580:1155-1161. [PMID: 27989479 DOI: 10.1016/j.scitotenv.2016.12.072] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/12/2016] [Accepted: 12/12/2016] [Indexed: 06/06/2023]
Abstract
Atmospheric aerosol particles composed of a mixture of organic and inorganic compounds are common and constitute an important fraction of air pollutants. In this study, the activities of common atmospheric inorganic ions (Ag+, Zn2+, Fe3+, Fe2+, Ca2+ and Al3+) and fatty acid molecules (stearic acid and arachidic acid) at air-aqueous interface were investigated by Langmuir methods and infrared reflection-absorption spectroscopy (IRRAS). In the presence of different inorganic ions, surface pressure-area isotherms of the Langmuir films showed compressed or expanded characteristics. IRRAS spectra confirmed that the existence of inorganic ions in the fatty acid monolayer changes the surface properties of aqueous-phase aerosols. Formation of different coordination types of carboxylates at the air-water interface alters the dissolution and partitioning behavior, which has significant influence of Raoult effect on nucleating cloud droplets. Our work displays the relationship between structure and surface properties for aqueous-phase aerosols and implies an efficient method for further understanding of their formation mechanism and potential atmospheric implications.
Collapse
Affiliation(s)
- Siyang Li
- Environment Research Institute, Shandong University, Shanda South Road 27, 250100, Shandong, China
| | - Lin Du
- Environment Research Institute, Shandong University, Shanda South Road 27, 250100, Shandong, China.
| | - Zhongming Wei
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Wenxing Wang
- Environment Research Institute, Shandong University, Shanda South Road 27, 250100, Shandong, China
| |
Collapse
|