MILLIMETER/SUBMILLIMETER SPECTROSCOPY OF THE METHYLAMINE PHOTODISSOCIATION PRODUCT AMINOMETHYL RADICAL (·CH₂NH₂)

Liang, Haocheng

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https://hdl.handle.net/2142/122446 Copy

Description

Title

MILLIMETER/SUBMILLIMETER SPECTROSCOPY OF THE METHYLAMINE PHOTODISSOCIATION PRODUCT AMINOMETHYL RADICAL (·CH₂NH₂)

Author(s)

Liang, Haocheng

Contributor(s)

• Widicus Weaver, Susanna L.
• Stanton, John F.
• Wright, Connor J.
• Rebelsky, Jonathan

Issue Date

2023-06-20

Keyword(s)

Radicals

Abstract

Methylamine (CH₃NH₂) is the simplest primary amine and a precursor of the simplest amino acid, glycine. Therefore, methylamine is a molecule of particular interest in astrochemistry and prebiotic chemistry. Previous astronomical obser- vations have detected methylamine in multiple star-forming regions, molecular clouds, meteorites, and the atmosphere of Titan. Studying the formation and dissociation mechanisms of methylamine is thus important for the modeling of chem- istry in these environments and for laying the groundwork for future astronomical observations. This work focuses on the aminomethyl radical (·CH₂NH₂), which is one of the expected products arising from the cosmic-ray induced photodisso-ciation of methylamine. A pulsed supersonic expansion of methylamine in argon was coupled with a high-voltage needle discharge source to produce ·CH₂NH₂ in a vacuum chamber. The rotational spectrum of ·CH₂NH₂ was collected in the millimeter/submillimeter regime, and the results were compared to theoretical predictions based on the molecular structure of ·CH₂NH₂. Here we will present the laboratory measurements and the results of the spectral analysis, as well as initial searches for ·CH₂NH₂ in the interstellar medium.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122446

DOI

https://doi.org/10.15278/isms.2023.6750

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