# Systematic investigation of CO$$_2$$:NH$$_3$$ ice mixtures using mid-IR and VUV spectroscopy – part 1: thermal processing

James, Rachel L., Ioppolo, Sergio, Hoffmann, Søren V., Jones, Nykola C., Mason, Nigel J., Dawes, Anita (2020) Systematic investigation of CO$$_2$$:NH$$_3$$ ice mixtures using mid-IR and VUV spectroscopy – part 1: thermal processing. RSC Advances, 10 (61). pp. 37515-37528. ISSN 2046-2069. (doi:10.1039/D0RA05826B) (KAR id:84286)

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## Abstract

The adjustment of experimental parameters in interstellar ice analogues can have profound effects on molecular synthesis within an ice system. We demonstrated this by systematically investigating the stoichiometric mixing ratios of CO$$_2$$:NH$$_3$$ ices as a function of thermal processing using mid-IR and VUV spectroscopy. We observed that the type of CO$$_2$$ bonding environment was dependent on the different stoichiometric mixing ratios and that this pre-determined the NH3 crystallite structure after phase change. The thermal reactivity of the ices was linked to the different chemical and physical properties of the stoichiometric ratios. Our results provide new details into the chemical and physical properties of the different stoichiometric CO$$_2$$:NH$$_3$$ ices enhancing our understanding of the thermally induced molecular synthesis within this ice system.

Item Type: Article 10.1039/D0RA05826B Q Science Divisions > Division of Natural Sciences > School of Physical Sciences Nigel Mason 19 Nov 2020 17:06 UTC 16 Feb 2021 14:16 UTC https://kar.kent.ac.uk/id/eprint/84286 (The current URI for this page, for reference purposes) https://orcid.org/0000-0002-4468-8324
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