期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 453, 期 2, 页码 1587-1596出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv1706
关键词
astrochemistry; methods: laboratory: solid state; techniques: spectroscopic; ISM: molecules
Among all existing complex organic molecules, glycolaldehyde HOCH2CHO and ethylene glycol HOCH2CH2OH are two of the largest detected molecules in the interstellar medium. We investigate both experimentally and theoretically the low-temperature reaction pathways leading to glycolaldehyde and ethylene glycol in interstellar grains. Using infrared spectroscopy, mass spectroscopy and quantum calculations, we investigate formation pathways of glycolaldehyde and ethylene glycol based on HCO center dot and (CH2OH)-C-center dot radical-radical recombinations. We also show that (CH2OH)-C-center dot is the main intermediate radical species in the H2CO to CH3OH hydrogenation processes. We then discuss astrophysical implications of the chemical pathway we propose on the observed gas-phase ethylene glycol and glycolaldehyde.
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