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James, Rachel; Jones, Nykola C.; Hoffmann, Søren V. and Dawes, Anita
(2019).
DOI: https://doi.org/10.1039/c9ra00462a
Abstract
We present the first vacuum ultraviolet spectroscopic study of an interstellar ice analogue of a 1 : 100 benzene (C6H6) : carbon dioxide (CO2) mixture which has been energetically processed with 1 keV electrons. We have exploited the fact that benzene has a relatively high photoabsorption cross section in the vacuum ultraviolet region to study this dilute mixture of benzene. Before irradiation with 1 keV electrons, we observed that the benzene electronic transition bands in the C6H6 : CO2 mixture exhibits a blueshift in band position towards energies observed in the gas-phase compared with that of pure, amorphous benzene and we have attributed this to a matrix isolation effect. After irradiation, a lowering in intensity of both the carbon dioxide and benzene electronic transition bands was observed, as well as the formation of the small irradiation product, carbon monoxide. A residue was obtained at 200 K which showed characteristic features of the benzene electronic transition of 1E1u ← 1A1g, but with additional structure suggesting the formation of a benzene derivative.
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- Item ORO ID
- 59251
- Item Type
- Journal Item
- ISSN
- 2046-2069
- Project Funding Details
-
Funded Project Name Project ID Funding Body Not Set Not Set The Open University Not Set ECF/ 2016-842 The Leverhulme Trust Not Set ST/N50421X/1 STFC (Science & Technology Facilities Council) CALIPSO plus under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020 730872 CLAIPSOPlus - Academic Unit or School
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Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Research Group
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Astronomy
Physics - Copyright Holders
- © 2019 The Royal Society of Chemistry
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