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Evans CJ, Sinik A, Medcraft C, McNaughton D, Appadoo D, Robertson EG. IR Band profiling of dichlorodifluoromethane in the greenhouse window: high-resolution FTIR spectroscopy of ν2 and ν8. J Phys Chem A 2014; 118:2480-7. [PMID: 24611450 DOI: 10.1021/jp501302q] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The IR spectrum of dichlorodifluoromethane (i.e., R12 or Freon-12) is central to its role as a major greenhouse contributor. In this study, high-resolution (0.000 96 cm(-1)) Fourier transform infrared spectra have been measured for R12 samples either cooled to around 150 K or at ambient temperature using facilities on the infrared beamline of the Australian Synchrotron. Over 14,000 lines of C(35)Cl2F2 and C(35)Cl(37)ClF2 were assigned to the b-type ν2 band centered around 668 cm(-1). For the c-type ν8 band at 1161 cm(-1), over 10,000 lines were assigned to the two isotopologues. Rovibrational fits resulted in upper state constants for all these band systems. Localized avoided crossings in the ν8 system of C(35)Cl2F2, resulting from both a direct b-axis Coriolis interaction with ν3 + ν4 + ν7 and an indirect interaction with ν3 + ν4 + ν9, were treated. An improved set of ground state constants for C(35)Cl(37)ClF2 was obtained by a combined fit of IR ground state combination differences and previously published millimeter wave lines. Together these new sets of constants allow for accurate prediction of these bands and direct comparison with satellite data to enable accurate quantification.
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Affiliation(s)
- Corey J Evans
- Department of Chemistry, University of Leicester , University Road, Leicester LE1 7RH, U.K
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McNaughton D, Robertson EG, Thompson CD, Chimdi T, Bane MK, Appadoo D. Overview of High-Resolution Infrared Measurement and Analysis for Atmospheric Monitoring of Halocarbons. Anal Chem 2010; 82:7958-64. [DOI: 10.1021/ac101425d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Don McNaughton
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Evan G. Robertson
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Christopher D. Thompson
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Tarekegn Chimdi
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Michael K. Bane
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Dominique Appadoo
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
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Nassar R, Bernath PF, Boone CD, Clerbaux C, Coheur PF, Dufour G, Froidevaux L, Mahieu E, McConnell JC, McLeod SD, Murtagh DP, Rinsland CP, Semeniuk K, Skelton R, Walker KA, Zander R. A global inventory of stratospheric chlorine in 2004. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007073] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Nassar R, Bernath PF, Boone CD, McLeod SD, Skelton R, Walker KA, Rinsland CP, Duchatelet P. A global inventory of stratospheric fluorine in 2004 based on Atmospheric Chemistry Experiment Fourier transform spectrometer (ACE-FTS) measurements. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007395] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pietropolli Charmet A, Stoppa P, Toninello P, Baldacci A, Giorgianni S. Jet-cooled diode laser spectra of CF3Br in the 9.2 μm region and rovibrational analysis of symmetric CF3stretching mode. Phys Chem Chem Phys 2006; 8:2491-8. [PMID: 16721433 DOI: 10.1039/b601852a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pulsed slit-jet high resolution (up to 0.0009 cm(-1) FWHM) infrared diode laser spectra of CF(3)Br, with natural isotopic abundance, were obtained in the region around 9.2 microm at the rotational temperature of about 50 K. In addition, diode laser spectra at reduced temperature (200 K) were recorded. We present here the rovibrational analysis of the nu(1) fundamental in the range 1075-1090 cm(-1). The fine structure of many P(J) and R(J) clusters has been well resolved for the first time. The assignment of rovibrational transitions has been accomplished up to K = 27, J = 63 for CFBr and K = 33, J = 62 for CFBr. A total of 636 (CFBr) and 880 (CFBr) lines were used in the final fit and a very accurate set of molecular constants, including the quartic centrifugal distortion coefficients for the v(1) = 1 state of both the bromine isotopologues, was obtained. In addition, spectral features belonging to the nu(1) + nu(6)-nu(6) hot band were unambiguously identified and a set of spectroscopic parameters were determined.
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Turquety S, Hadji-Lazaro J, Clerbaux C, Hauglustaine DA, Clough SA, Cassé V, Schlüssel P, Mégie G. Operational trace gas retrieval algorithm for the Infrared Atmospheric Sounding Interferometer. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2004jd004821] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- S. Turquety
- Service d'Aéronomie; Institut Pierre-Simon Laplace; Paris France
| | - J. Hadji-Lazaro
- Service d'Aéronomie; Institut Pierre-Simon Laplace; Paris France
| | - C. Clerbaux
- Service d'Aéronomie; Institut Pierre-Simon Laplace; Paris France
| | - D. A. Hauglustaine
- Laboratoire des Sciences du Climat et de l'Environnement; Institut Pierre-Simon Laplace; Gif-sur-Yvette France
| | - S. A. Clough
- Atmospheric and Environmental Research, Inc.; Lexington Massachusetts USA
| | - V. Cassé
- Centre National d'Etudes Spatiales; Toulouse France
| | - P. Schlüssel
- European Organization for the Exploitation of Meteorological Satellites (EUMETSAT); Darmstadt Germany
| | - G. Mégie
- Service d'Aéronomie; Institut Pierre-Simon Laplace; Paris France
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