High resolution far infrared spectroscopy of HFC-134a at cold temperatures
Wong, Andy
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https://hdl.handle.net/2142/91200
Description
Title
High resolution far infrared spectroscopy of HFC-134a at cold temperatures
Author(s)
Wong, Andy
Contributor(s)
McNaughton, Don
Appadoo, Dominique
Robertson, Evan Gary
Thompson, Christopher
Medcraft, Chris
Issue Date
2016-06-20
Keyword(s)
Spectroscopy in Atmospheric Chemistry
Abstract
Since the signing of the Montreal protocol, long-lived chlorofluorocarbons have been banned due to their high ozone depleting potential. In order to minimise the effect of such molecules, hydrofluorocarbons (HFCs) were synthesized as replacement molecules to be used as refrigerants and foam blowing agents. HFC-134a, or 1,1,1,2-tetrafluoroethane, is one of these molecules. Although HFCs do not cause ozone depletion, they are typically strong absorbers within the 10 micron atmospheric window, which lead to high global warming potentials. A high resolution FT-IR analysis of the \nub{8} band (near 665 \wn) of HFC-134a has been performed to help understand the intermode coupling between the \nub{8} vibrational state and unobserved dark states.
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