Formation of NH2CHO and CH3CHO upon UV processing of interstellar ice analogs

Complex organic molecules (COMs) may have played a role in the formation of life in the early Earth (Herbst & van Dishoeck (2009)). In Martin-Domenech et al. (2020) we presented the formation of NH2CHO and CH3CHO upon vacuum-ultraviolet (VUV) irradiation of CO:NH3 and CO:CH4 ice mixtures, simulating the UV processing of interstellar ices in the interior of dense clouds. We found that the conversion from NH2˙ radicals to NH2CHO is 2-16 times higher than that from CH3˙ to CH3CHO, probably due to the competing formation of larger hydrocarbons in the latter case. 

Here, we present all the infrared spectra and temperature programmed desorption data corresponding to the 30 experiments listed in the above publication.