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Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy

Pavithraa, S.; Methikkalam, R. R. J.; Gorai, P.; Lo, J -I.; Das, A.; Raja Sekhar, B. N.; Pradeep, T.; Cheng, B -M.; Mason, N. J. and Sivaraman, B. (2017). Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 178 pp. 166–170.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.saa.2017.01.023
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Abstract

Here we report the first evidence for a reversible phase change in an ethanethiol ice prepared under astrochemical conditions. InfraRed (IR) spectroscopy was used to monitor the morphology of the ice using the Ssingle bondH stretching vibration, a characteristic vibration of thiol molecules. The deposited sample was able to switch between amorphous and crystalline phases repeatedly under temperature cycles between 10 K and 130 K with subsequent loss of molecules in every phase change. Such an effect is dependent upon the original thickness of the ice. Further work on quantitative analysis is to be carried out in due course whereas here we are reporting the first results obtained.

Item Type: Journal Item
ISSN: 1386-1425
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Physics
Item ID: 51390
Depositing User: ORO Import
Date Deposited: 09 Oct 2017 15:24
Last Modified: 03 May 2019 18:43
URI: http://oro.open.ac.uk/id/eprint/51390
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