ROTATIONAL SPECTROSCOPY OF NEWLY DETECTED ATMOSPHERIC OZONE DEPLETERS: CF3CH2Cl, CF3CCl3, AND CF2ClCCl3
In a recent study of unpolluted air samples from Tasmania and of deep firn snow in Greenland four previously overlooked ozone-depleting substances have been identified.footnote{J.C.Laube, et al., {it Nature Geoscience} {bf 7}, 266 (2014).} These compounds started to emerge in the atmosphere in the 1...
Main Author: | |
---|---|
Format: | Text |
Language: | unknown |
Published: |
International Symposium on Molecular Spectroscopy
|
Subjects: | |
Online Access: | http://hdl.handle.net/2142/79157 |
id |
ftunivillidea:oai:www.ideals.illinois.edu:2142/79157 |
---|---|
record_format |
openpolar |
spelling |
ftunivillidea:oai:www.ideals.illinois.edu:2142/79157 2023-05-15T16:29:33+02:00 ROTATIONAL SPECTROSCOPY OF NEWLY DETECTED ATMOSPHERIC OZONE DEPLETERS: CF3CH2Cl, CF3CCl3, AND CF2ClCCl3 Kisiel, Zbigniew 25-Jun-15 http://hdl.handle.net/2142/79157 unknown International Symposium on Molecular Spectroscopy http://hdl.handle.net/2142/79157 ACS Atmospheric science Text ftunivillidea 2016-03-19T23:53:03Z In a recent study of unpolluted air samples from Tasmania and of deep firn snow in Greenland four previously overlooked ozone-depleting substances have been identified.footnote{J.C.Laube, et al., {it Nature Geoscience} {bf 7}, 266 (2014).} These compounds started to emerge in the atmosphere in the 1960s, and two: CF$_3$CCl$_3$ (CFC-113a) and CF$_3$CH$_2$Cl (HCHF-133a) continue to accumulate in the atmosphere. vspace{0.2cm} Three of the four compounds have non-zero dipole moments and are amenable to study by rotational spectroscopy, establishing the basis for analytic applications. Relatively limited studies have been reported for CF$_3$CH$_2$Clfootnote{T.Ogata, et al., {it J. Mol. Struct.} {bf 144}, 1 (1986).} and CF$_3$CCl$_3$,footnote{R.Holm, et al., {it Z. Naturforsch.} {bf 23a}, 1040 (1968).}$^,$footnote{J.H.Carpenter et al., {it J. Mol. Spectrosc.} {bf 154}, 207 (1992); P.J.Seo et al., {it J. Mol. Spectrosc.} {bf 169}, 58 (1995).} while CF$_2$ClCCl$_3$ has not yet been studied by this technique. We presently report extensive results obtained for all three compounds, resulting from concerted application of supersonic expansion FTMW spectroscopy in chirped pulse and cavity modes, and room-temperature MMW spectroscopy. Among the plentiful results, we have been able to resolve and fit the complex nuclear quadrupole hyperfine splitting. Text Greenland University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship) Greenland |
institution |
Open Polar |
collection |
University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship) |
op_collection_id |
ftunivillidea |
language |
unknown |
topic |
Atmospheric science |
spellingShingle |
Atmospheric science Kisiel, Zbigniew ROTATIONAL SPECTROSCOPY OF NEWLY DETECTED ATMOSPHERIC OZONE DEPLETERS: CF3CH2Cl, CF3CCl3, AND CF2ClCCl3 |
topic_facet |
Atmospheric science |
description |
In a recent study of unpolluted air samples from Tasmania and of deep firn snow in Greenland four previously overlooked ozone-depleting substances have been identified.footnote{J.C.Laube, et al., {it Nature Geoscience} {bf 7}, 266 (2014).} These compounds started to emerge in the atmosphere in the 1960s, and two: CF$_3$CCl$_3$ (CFC-113a) and CF$_3$CH$_2$Cl (HCHF-133a) continue to accumulate in the atmosphere. vspace{0.2cm} Three of the four compounds have non-zero dipole moments and are amenable to study by rotational spectroscopy, establishing the basis for analytic applications. Relatively limited studies have been reported for CF$_3$CH$_2$Clfootnote{T.Ogata, et al., {it J. Mol. Struct.} {bf 144}, 1 (1986).} and CF$_3$CCl$_3$,footnote{R.Holm, et al., {it Z. Naturforsch.} {bf 23a}, 1040 (1968).}$^,$footnote{J.H.Carpenter et al., {it J. Mol. Spectrosc.} {bf 154}, 207 (1992); P.J.Seo et al., {it J. Mol. Spectrosc.} {bf 169}, 58 (1995).} while CF$_2$ClCCl$_3$ has not yet been studied by this technique. We presently report extensive results obtained for all three compounds, resulting from concerted application of supersonic expansion FTMW spectroscopy in chirped pulse and cavity modes, and room-temperature MMW spectroscopy. Among the plentiful results, we have been able to resolve and fit the complex nuclear quadrupole hyperfine splitting. |
format |
Text |
author |
Kisiel, Zbigniew |
author_facet |
Kisiel, Zbigniew |
author_sort |
Kisiel, Zbigniew |
title |
ROTATIONAL SPECTROSCOPY OF NEWLY DETECTED ATMOSPHERIC OZONE DEPLETERS: CF3CH2Cl, CF3CCl3, AND CF2ClCCl3 |
title_short |
ROTATIONAL SPECTROSCOPY OF NEWLY DETECTED ATMOSPHERIC OZONE DEPLETERS: CF3CH2Cl, CF3CCl3, AND CF2ClCCl3 |
title_full |
ROTATIONAL SPECTROSCOPY OF NEWLY DETECTED ATMOSPHERIC OZONE DEPLETERS: CF3CH2Cl, CF3CCl3, AND CF2ClCCl3 |
title_fullStr |
ROTATIONAL SPECTROSCOPY OF NEWLY DETECTED ATMOSPHERIC OZONE DEPLETERS: CF3CH2Cl, CF3CCl3, AND CF2ClCCl3 |
title_full_unstemmed |
ROTATIONAL SPECTROSCOPY OF NEWLY DETECTED ATMOSPHERIC OZONE DEPLETERS: CF3CH2Cl, CF3CCl3, AND CF2ClCCl3 |
title_sort |
rotational spectroscopy of newly detected atmospheric ozone depleters: cf3ch2cl, cf3ccl3, and cf2clccl3 |
publisher |
International Symposium on Molecular Spectroscopy |
publishDate |
|
url |
http://hdl.handle.net/2142/79157 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
http://hdl.handle.net/2142/79157 ACS |
_version_ |
1766019262361632768 |