C2H2···CO complex and its radiation-induced transformations: A building block for cold synthetic astrochemistry

Zasimov P.V., Ryazantsev S.V., Tyurin D.A., Feldman V.I.
Тип документаJournal Article
Дата публикации2021-09-01
Название журналаMonthly Notices of the Royal Astronomical Society
Издатель
  • Space and Planetary Science
  • Astronomy and Astrophysics
Краткое описание
ABSTRACT

In this work, we have examined the radiation-induced synthetic chemistry occurring in an astrochemically important C2H2–CO system at the molecular level using a matrix isolation approach. The 1:1 C2H2···CO intermolecular complex of linear structure was obtained in the solid low-temperature (5 K) noble gas matrices by deposition of the C2H2/CO/Ng (Ng = Ar, Kr, Xe) gaseous mixtures and characterized by Fourier-transform infrared spectroscopy. It was found that the X-ray radiolysis of the C2H2···CO complex resulted in formation of C3O (tricarbon monoxide), HCCCHO (propynal), c-H2C3O (cyclopropenone), H2CCCO (propadienone), and HC3O (oxoprorynyl radical). This means that the studied complex may be considered as the simplest building block (or minimal size of intermolecular reactor) for cold astrochemistry occurring in mixed interstellar ices. Remarkably, the discovered transformations of the complex actually represent synthetic routes leading to various C3 species, whereas the acetylenic C–H bond cleavage yielding ethynyl radical appears to be a minor process. Prolonged irradiation results in dehydrogenation, while the C3 skeleton is retained. The interpretation of the C2H2···CO radiolysis mechanism (possible reactions pathways) is provided based on the analysis of kinetic curves and matrix effect. Astrochemical implications of the results are discussed.

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1. Zasimov P.V. и др. C2H2···CO complex and its radiation-induced transformations: a building block for cold synthetic astrochemistry // Monthly Notices of the Royal Astronomical Society. 2021. Т. 506. № 3. С. 3499–3510.
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TY - JOUR

DO - 10.1093/mnras/stab1820

UR - http://dx.doi.org/10.1093/mnras/stab1820

TI - C2H2···CO complex and its radiation-induced transformations: a building block for cold synthetic astrochemistry

T2 - Monthly Notices of the Royal Astronomical Society

AU - Zasimov, Pavel V

AU - Ryazantsev, Sergey V

AU - Tyurin, Daniil A

AU - Feldman, Vladimir I

PY - 2021

DA - 2021/07/02

PB - Oxford University Press (OUP)

SP - 3499-3510

IS - 3

VL - 506

SN - 0035-8711

SN - 1365-2966

ER -

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@article{2021,

doi = {10.1093/mnras/stab1820},

url = {https://doi.org/10.1093%2Fmnras%2Fstab1820},

year = 2021,

month = {jul},

publisher = {Oxford University Press ({OUP})},

volume = {506},

number = {3},

pages = {3499--3510},

author = {Pavel V Zasimov and Sergey V Ryazantsev and Daniil A Tyurin and Vladimir I Feldman},

title = {C2H2$\cdotp$$\cdotp$$\cdotp${CO} complex and its radiation-induced transformations: a building block for cold synthetic astrochemistry}

}

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Zasimov, Pavel V et al. “C2H2···CO Complex and Its Radiation-Induced Transformations: a Building Block for Cold Synthetic Astrochemistry.” Monthly Notices of the Royal Astronomical Society 506.3 (2021): 3499–3510. Crossref. Web.