Systematic investigation of CO2 : NH3 ice mixtures using mid-IR and VUV spectroscopy – part 1: thermal processing. Issue 61 (12th October 2020)

• Record Type: Journal Article
• Authors: James, Rachel L.; Ioppolo, Sergio; Hoffmann, Søren V.; Jones, Nykola C.; Mason, Nigel J.; Dawes, Anita
• Is Part Of: RSC advances. Volume 10:Issue 61(2020)
• Page Start: 37515
• Page End: 37528
• Publication Date: 2020-10-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra05826b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The stoichiometric mixing ratio of CO2 : NH3 ices determines both the initial chemical and physical properties of the ices and their evolution through thermal processing including CO2 bonding environment, NH3 crystallite size and amount of residue. 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 CO2 : NH3 ices as a function of thermal processing using mid-IR and VUV spectroscopy. We observed that the type of CO2 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 CO2 : NH3 ices enhancing our understanding of the thermally induced molecular synthesis within this ice system.