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Catalytic role of HI in the interstellar synthesis of complex organic molecule
- Source :
- Research in Astronomy and Astrophysics, 23, 055019 (2023)
- Publication Year :
- 2023
-
Abstract
- Using quantum chemical calculations, we model the pathways for synthesizing two purine nucleobases, adenine and guanine, in the gas-phase interstellar environment, surrounded by neutral atomic hydrogen (HI). HI is found active in facilitating a series of fundamental proton transfer processes of organic synthesis, including bond formation, cyclization, dehydrogenation, and H migration. The reactive potential barriers were significantly reduced in the alternative pathways created by HI, leading to a remarkable increase in the reaction rate. The presence of HI also lowered the reactive activation temperature from 757.8 K to 131.5-147.0 K, indicating the thermodynamic feasibility of these pathways in star-forming regions where some of the reactants have been astronomically detected. Our findings suggest that HI may serve as an effective catalyst for interstellar organic synthesis.<br />Comment: 6 figures
- Subjects :
- Astrophysics - Astrophysics of Galaxies
Subjects
Details
- Database :
- arXiv
- Journal :
- Research in Astronomy and Astrophysics, 23, 055019 (2023)
- Publication Type :
- Report
- Accession number :
- edsarx.2305.11409
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1674-4527/accb25