Formation of complex organic molecules in astrophysical environments: Sugars and derivatives
| Autor: | Christina E. Buffo, George Cooper, Michel Nuevo, John M. Saunders, Scott A. Sandford |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
0303 health sciences Astrochemistry Astronomy and Astrophysics medicine.disease_cause 01 natural sciences Sugar acids Amino acid Nucleobase 03 medical and health sciences chemistry Meteorite Space and Planetary Science 0103 physical sciences Amphiphile medicine Organic chemistry Sugar 010303 astronomy & astrophysics Ultraviolet 030304 developmental biology |
| Zdroj: | Proceedings of the International Astronomical Union. 15:123-126 |
| ISSN: | 1743-9221 1743-9213 |
| DOI: | 10.1017/s1743921319009323 |
| Popis: | Carbonaceous meteorites contain a large variety of complex organic molecules, including amino acids, nucleobases, sugar derivatives, amphiphiles, and other compounds of astrobiological interest. Photoprocessing of ices condensed on cold grains with ultraviolet (UV) photons was proposed as an efficient way to form such complex organics in astrophysical environments. This hypothesis was confirmed by laboratory experiments simulating photo-irradiation of ices containing H2O, CH3OH, CO, CO2, CH4, H2CO, NH3, HCN, etc., condensed on cold (~10–80 K) substrates. These experiments resulted in the formation of amino acids, nucleobases, sugar derivatives, amphiphilic compounds, and other organics comparable to those identified in carbonaceous meteorites. This work presents results for the formation of sugars, sugar alcohols, sugar acids, and their deoxy variants from the UV irradiation of ices containing H2O and CH3OH in relative proportions 2:1, and their comparison with meteoritic data. The formation mechanisms of these compounds and the astrobiological implications are also discussed. |
| Databáze: | OpenAIRE |
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