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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus

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Volume 229, Issue 10-12


The Rotationally-Resolved Absorption Spectrum of Formaldehyde from 6547 to 7051 cm−1

Albert A. Ruth
  • Physics Department & Environmental Research Institute, University College Cork, Cork, Ireland
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/ Uwe Heitmann
  • Physics Department & Environmental Research Institute, University College Cork, Cork, Ireland
  • Technische Universität Berlin, Institut für Optik und Atomare Physik, Sekr. EW3-1, Hardenbergstr. 36, 10623 Berlin, Germany
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/ Elke Heinecke / Christa Fittschen
  • Corresponding author
  • Université de Lille, PhysicoChimie des Processus de Combustion et de l'Atmosphère (PC2A) UMR 8522, CNRS/Lille 1, Cité scientifique, 59655 Villeneuve d'Ascq Cedex, France
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Published Online: 2015-09-11 | DOI: https://doi.org/10.1515/zpch-2015-0623


We report new experimental data on the rotationally resolved room temperature absorption spectrum of CH2O in the near infrared (NIR) region between 6804 and 7051 cm1 (1470–1418 nm). Data have been obtained by cavity enhanced absorption spectroscopy and complement the spectrum in the wavelength range 6547–6804 cm1, obtained using virtually the same experimental set-up and already published in an earlier publication (Staak et al., J. Mol. Spectrosc. 229 (2005) 115–121). Several vibrational combination bands occur in this region and give rise to a congested spectrum and over 4500 lines with cross-sections over 5 · 1023 cm2 were observed. Recent experimental studies using NIR absorption spectroscopy for quantifying CH2O in different chemical systems indicate that the absorption cross-sections obtained by Staak et al. may have been overestimated. The results of these experiments are reviewed here and a recommendation for absolute absorption cross sections of CH2O in the NIR range will be given. Absolute absorption cross-sections stated here are corrected by the recommended factor.

This article offers supplementary material which is provided at the end of the article.

Keywords: Spectroscopy; Formaldehyde; Near Infrared; Cavity Enhanced Spectroscopy

Supplementary material

the online version of this article (DOI: 10.1515/zpch-2015-0623) provides supplementary material for authorized users.

About the article

Accepted: 2015-07-28

Received: 2015-04-07

Published Online: 2015-09-11

Published in Print: 2015-10-28

Citation Information: Zeitschrift für Physikalische Chemie, Volume 229, Issue 10-12, Pages 1609–1624, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2015-0623.

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