气候变化领域集成服务门户(CCPortal): Aqueous-phase behavior of glyoxal and methylglyoxal observed with carbon and oxygen K-edge X-ray absorption spectroscopy

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DOI	10.5194/acp-21-2881-2021
	Aqueous-phase behavior of glyoxal and methylglyoxal observed with carbon and oxygen K-edge X-ray absorption spectroscopy
	Michailoudi G.; Lin J.J.; Yuzawa H.; Nagasaka M.; Huttula M.; Kosugi N.; Kurtén T.; Patanen M.; Prisle N.L.
发表日期	2021
ISSN	1680-7316
起始页码	2881
结束页码	2894
卷号	21 期号:4
英文摘要	Glyoxal (CHOCHO) and methylglyoxal (CH3C.O/CHO) are well-known components of atmospheric particles and their properties can impact atmospheric chemistry and cloud formation. To get information on their hydration states in aqueous solutions and how they are affected by the addition of inorganic salts (sodium chloride (NaCl) and sodium sulfate (Na2SO4)), we applied carbon and oxygen K-edge X-ray absorption spectroscopy (XAS) in transmission mode. The recorded C K-edge spectra show that glyoxal is completely hydrated in the dilute aqueous solutions, in line with previous studies. For methylglyoxal, supported by quantum chemical calculations we identified not only C-H, C=O and C-OH bonds, but also fingerprints of C-OH(CH2) and C=C bonds. The relatively low intensity of C=O transitions implies that the monohydrated form of methylglyoxal is not favored in the solutions. Instead, the spectral intensity is stronger in regions where products of aldol condensation and enol tautomers of the monohydrates contribute. The addition of salts was found to introduce only very minor changes to absorption energies and relative intensities of the observed absorption features, indicating that XAS in the near-edge region is not very sensitive to these intermolecular organic-inorganic interactions at the studied concentrations. The identified structures of glyoxal and methylglyoxal in an aqueous environment support the uptake of these compounds to the aerosol phase in the presence of water and their contribution to secondary organic aerosol formation. © 2021 American Society of Mechanical Engineers (ASME). All rights reserved.
语种	英语
scopus关键词	aerosol formation; aqueous solution; atmospheric chemistry; carbon; inorganic salt; oxygen; X-ray spectroscopy
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247114
作者单位	Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, Oulu, 90014, Finland; Institute for Molecular Science, Myodaiji, Okazaki, 444-8585, Japan; Department of Chemistry and Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, P.O. Box 55, Helsinki, 00014, Finland; Center for Atmospheric Research, University of Oulu, P.O. Box 4500, Oulu, 90014, Finland
推荐引用方式 GB/T 7714	Michailoudi G.,Lin J.J.,Yuzawa H.,et al. Aqueous-phase behavior of glyoxal and methylglyoxal observed with carbon and oxygen K-edge X-ray absorption spectroscopy[J],2021,21(4).
APA	Michailoudi G..,Lin J.J..,Yuzawa H..,Nagasaka M..,Huttula M..,...&Prisle N.L..(2021).Aqueous-phase behavior of glyoxal and methylglyoxal observed with carbon and oxygen K-edge X-ray absorption spectroscopy.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(4).
MLA	Michailoudi G.,et al."Aqueous-phase behavior of glyoxal and methylglyoxal observed with carbon and oxygen K-edge X-ray absorption spectroscopy".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.4(2021).