Hydrogen Reactions and IR Spectroscopy of Molecules of Astrophysical Interest in Para-Hydrogen Matrices

Prasad Ramesh Joshi, Yuan Pern Lee*

*此作品的通信作者

研究成果: Conference contribution同行評審

摘要

Solid para-hydrogen (p-H2) has been demonstrated to be an excellent matrix host for studying reactions involving H atoms at low temperature, especially in darkness. We first briefly reviewed our previous work on the reactions of astrochemical species with hydrogen atoms in solid p-H2 at 3.2 K. This includes methanol, methyl formate, formamide, acetamide, acetic acid, and glycine. The previously overlooked H-abstraction reactions occurred in all cases. We then present preliminary results of the reaction of H atoms with methylamine CH3NH2. We observed IR spectra of •CH2NH2 and CH2NH upon irradiation and when the matrix was maintained in darkness. Experiments on CD3NH2 produced, in addition to •CD2NH2 and CD2NH, CHD2NH2, confirming the occurrence of H addition to •CD2NH2. The observed mechanism containing two consecutive H-abstraction and two H-addition steps chemically connects CH3NH2 and CH2NH so that they might reach quasi-equilibrium. In addition, the observed infrared spectra can be useful to analyze observations from ground-based telescopes and James Webb Space Telescope.

原文English
主出版物標題European Conference on Laboratory Astrophysics ECLA2020 - The Interplay of Dust, Ice, and Gas in Space
編輯Vito Mennella, Christine Joblin
發行者Springer Science and Business Media B.V.
頁面169-175
頁數7
ISBN(列印)9783031290022
DOIs
出版狀態Published - 2023
事件European Conference on Laboratory Astrophysics, ECLA 2020 - Anacapri, Italy
持續時間: 26 9月 20211 10月 2021

出版系列

名字Astrophysics and Space Science Proceedings
59
ISSN(列印)1570-6591
ISSN(電子)1570-6605

Conference

ConferenceEuropean Conference on Laboratory Astrophysics, ECLA 2020
國家/地區Italy
城市Anacapri
期間26/09/211/10/21

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