Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/31348
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Chuang, K. -J. | en_US |
dc.contributor.author | FEDOSEEV, GLEB | en_US |
dc.contributor.author | Qasim,D. | en_US |
dc.contributor.author | Ioppolo, S. | en_US |
dc.contributor.author | Jäger, C. | en_US |
dc.contributor.author | Henning, Th. | en_US |
dc.contributor.author | PALUMBO, Maria Elisabetta | en_US |
dc.contributor.author | Dishoeck, E. F. van | en_US |
dc.contributor.author | Linnartz, H. | en_US |
dc.date.accessioned | 2022-01-24T11:10:22Z | - |
dc.date.available | 2022-01-24T11:10:22Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31348 | - |
dc.description.abstract | Complex organic molecules (COMs) have been identified toward high- and low-mass protostars as well as molecular clouds, suggesting that these interstellar species originate from the early stage(s) of starformation. The reaction pathways resulting in COMs described by the formula C$_2$H$_\text{n}$O are still under debate. In this work, we investigate the laboratory possible solid-state reactions that involve simple hydrocarbons and OH-radicals along with H$_2$O ice under translucent cloud conditions (1$\leq$A$_V$$\leq$5 and \textit{n}$_\text{H}$$\sim$10$^3$ cm$^{-3}$). We focus on the interactions of C$_2$H$_2$ with H-atoms and OH-radicals, which are produced along the H$_2$O formation sequence on grain surfaces at 10 K. Ultra-high vacuum (UHV) experiments were performed to study the surface chemistry observed during C$_2$H$_2$ + O$_2$ + H codeposition, where O$_2$ was used for the in-situ generation of OH-radicals. Reflection absorption infrared spectroscopy (RAIRS) was applied to in situ monitor the initial and newly formed species. After that, a temperature-programmed desorption experiment combined with a Quadrupole mass spectrometer (TPD-QMS) was used as a complementary analytical tool. The investigated 10 K surface chemistry of C$_2$H$_2$ with H-atoms and OH-radicals not only results in semi and fully saturated hydrocarbons, such as ethylene (C$_2$H$_4$) and ethane (C$_2$H$_6$), but it also leads to the formation of COMs, such as vinyl alcohol, acetaldehyde, ketene, ethanol, and possibly acetic acid. It is concluded that OH-radical addition reactions to C$_2$H$_2$, acting as a molecular backbone, followed by isomerization (i.e., keto-enol tautomerization) via an intermolecular pathway and successive hydrogenation provides a so far experimentally unreported solid-state route for the formation of these species without the need of energetic input. The kinetics of acetaldehyde reacting with impacting H-atoms leading to ketene and ethanol is found to have a preference for the saturated product. The astronomical relevance of the reaction network introduced here is discussed. | en_US |
dc.language.iso | eng | en_US |
dc.title | Formation of complex molecules in translucent clouds: Acetaldehyde, vinyl alcohol, ketene, and ethanol via nonenergetic processing of C2H2 ice | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201937302 | en_US |
dc.identifier.scopus | 2-s2.0-85083236686 | en_US |
dc.identifier.isi | WOS:000524541200001 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2020/03/aa37302-19/aa37302-19.html | en_US |
dc.identifier.url | http://arxiv.org/abs/2002.06971v1 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 635 | en_US |
dc.relation.firstpage | A199 | en_US |
dc.relation.numberofpages | 16 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 9 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | GBR | en_US |
dc.contributor.country | DEU | en_US |
dc.contributor.country | NLD | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2020IAUS..350...77P | en_US |
dc.relation.fund | H2020 | en_US |
dc.relation.project | AstroFIt2 (Astronomy Fellowships in Italy 2) | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.orcid | 0000-0002-9122-491X | - |
crisitem.project.grantno | 664931 | - |
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