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Stability of pyruvic acid clusters upon slow electron attachment

SYSNO ASEP	0539383
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Stability of pyruvic acid clusters upon slow electron attachment
Author(s)	Pysanenko, Andriy (UFCH-W)_{RID, ORCID} Grygoryeva, Kateřina (UFCH-W) Kočišek, Jaroslav (UFCH-W)_{RID, ORCID} Kumar, Ragesh Thelakkadan Puthiyaveettil (UFCH-W)_{ORCID, RID} Fedor, Juraj (UFCH-W)_ORCID Ončák, Milan (UFCH-W)_{ORCID, RID} Fárník, Michal (UFCH-W)_{RID, ORCID}
Source Title	Physical Chemistry Chemical Physics. - : Royal Society of Chemistry - ISSN 1463-9076 Roč. 23, č. 7 (2021), s. 4317-4325
Number of pages	9 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	Electron energy levels ; Energy dissipation ; Mass spectrometry
Subject RIV	CF - Physical ; Theoretical Chemistry
OECD category	Physical chemistry
R&D Projects	GA21-07062S GA ČR - Czech Science Foundation (CSF)
	LTAUSA19031 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Limited access
Institutional support	UFCH-W - RVO:61388955
UT WOS	000621595300027
EID SCOPUS	85101707707
DOI	10.1039/D0CP06464E
Annotation	Pyruvic acid represents a key molecule in prebiotic chemistry and it has recently been proposed to be synthesized on interstellar ices. In order to probe the stability of pyruvic acid in the interstellar medium with respect to decomposition by slow electrons, we investigate the electron attachment to its homomolecular and heteromolecular clusters. Using mass spectrometry, we follow the changes in the fragmentation pattern and its dependence on the electron energy for various cluster sizes of pure and microhydrated pyruvic acid. The assignment of fragmentation reaction pathways is supported by ab initio calculations. The fragmentation degree dramatically decreases upon clustering. This decrease is even stronger in the heteromolecular clusters of pyruvic acid with water, where the non-dissociative attachment is by far the strongest channel. In the homomolecular clusters, the dissociative channel leading to dehydrogenation is active over a larger electron energy range than in the isolated molecules. To probe the role of the self-scavenging effects, we explore the excited states of pyruvic acid. This has been done both experimentally, by using electron energy loss spectroscopy, and theoretically, by photochemical calculations. Data on both optically-allowed and forbidden states allow for the explanation of processes emerging upon clustering.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2022
Electronic address	http://hdl.handle.net/11104/0317082

Number of the records: 1