Infrared-Assisted Synthesis of Prebiotic Glycine.

Area of Science:

• Astrobiology and prebiotic chemistry research.
• Organic synthesis and reaction mechanisms.
• Physical chemistry and spectroscopy.

Background:

• Understanding the origins of life requires synthesizing complex organic molecules (COMs) under plausible prebiotic conditions.
• Previous methods for synthesizing prebiotic molecules often require high energy or specific conditions not readily available on early Earth.
• Infrared (IR) radiation offers a potential non-thermal energy source for driving chemical reactions in space and early Earth environments.

Purpose of the Study:

• To develop a novel method for synthesizing prebiotic COMs using IR radiation.
• To demonstrate the synthesis of glycine, a fundamental amino acid, via IR-assisted ion-molecule reactions.
• To explore new synthetic pathways for COMs relevant to the origin of life.

Main Methods:

• Development of an original laboratory reactor operating at low gas density.
• Utilizing IR laser light to irradiate ion-molecule complexes within a mass spectrometer reactor.
• Formation of an ion-molecule complex from acetic acid and hydroxylamine, followed by IR photon irradiation.

Main Results:

• Successful synthesis of glycine structures and its isomers through IR-assisted ion-molecule reactions.
• Experimental data interpreted using anharmonic vibrational frequency calculations and fragmentation dynamics simulations.
• Demonstration of a novel pathway for generating prebiotic molecules using IR radiation.

Conclusions:

• The developed IR-driven synthesis approach is effective for producing prebiotic molecules like glycine.
• This method offers a new tool for investigating the formation of COMs relevant to prebiotic chemistry.
• The approach holds potential for extending to the synthesis of other complex organic molecules important for life's origins.