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On the correlation of the abundances of HNCO and NH2CHO: Advantages of solid para-H2 to study astrochemical H-atom addition and abstraction reactions

Published online by Cambridge University Press:  12 October 2020

György Tarczay Open the ORCID record for György Tarczay [Opens in a new window] ,
Karolina Haupa  and
Yuan-Pern Lee
György Tarczay
Affiliation:
HAS-ELTE Laboratory Astrochemistry Lendület Research Group, Pázmány P. S. 1/a, Budapest, 1117, Hungary ELTE Eötvös Loránd University, Lab. of Molecular Spectroscopy, Institute of Chemistry, Pázmány P. S. 1/a, Budapest, 1117, Hungary
Karolina Haupa
Affiliation:
Dept. of Applied Chemistry and Inst. of Molecular Science, National Chiao Tung University, Hsinchu, 30010, Taiwan
Yuan-Pern Lee
Affiliation:
Dept. of Applied Chemistry and Inst. of Molecular Science, National Chiao Tung University, Hsinchu, 30010, Taiwan Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu 30010, Taiwan Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan emails: tarczay@caesar.elte.hu, karolina.haupa@gmail.com, yplee@nctu.edu.tw
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Abstract

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In dense interstellar clouds that are shielded from high-energy radiation (e.g., UV photons or cosmic rays), H-atom addition and abstraction reactions that take place on grain surfaces play principal roles in the synthesis or decomposition of complex organic molecules (COMs). These reactions are extensively investigated with laboratory experiments by bombarding astrophysical analogue ices with a beam of low-temperature H atoms. Here we demonstrate that, although 2-4 K solid para-H2 does not represent a typical environment of the surface of interstellar grains, para-H2 matrix isolation combined with IR spectroscopy is a complementary tool to sensitively detect astrochemical hydrogenation and dehydrogenation processes.

Keywords

astrochemistrymolecular processesISM: clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 394 - 396
Copyright
© International Astronomical Union 2020

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