The quantitative infrared and NIR spectrum of CH2I2 vapor: vibrational assignments and potential for atmospheric monitoring
Item
Title (Dublin Core)
The quantitative infrared and NIR spectrum of CH2I2 vapor: vibrational assignments and potential for atmospheric monitoring
Description (Dublin Core)
Diiodomethane (CH<sub>2</sub>I<sub>2</sub>) has recently become a molecule of significant atmospheric interest as it can contribute to coastal IO formation. As part of the PNNL database of gas-phase infrared spectra, the quantitative absorption spectrum of CH<sub>2</sub>I<sub>2</sub> has been acquired at 0.1 cm<sup>-1</sup> resolution. Two strong b<sub>2</sub> symmetry A-type bands at 584 and 1114 cm<sup>-1</sup> are observed, but are not resolved when broadened to 760 Torr with nitrogen and appear as B-type. In contrast, the b<sub>1</sub> symmetry C-type bands near 5953, 4426 and 3073 cm<sup>-1</sup> are resolved with rotational structure, including Q-branches with widths ≤1 cm<sup>-1</sup>. The quantitative infrared and near-infrared vapor-phase spectra (600–10 000 cm<sup>-1</sup>) are reported for the first time. Some bands are discussed in terms of their potential for atmospheric monitoring and theoretical detection limits on a selected basis. FT-Raman spectra and ab initio calculations are used to complete vibrational assignments in the C<sub>2<i>v</i></sub> point group.
Creator (Dublin Core)
Johnson, T. J.
Masiello, T.
Sharpe, S. W.
Date (Dublin Core)
2018-06-28
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-6-2581-2006
https://acp.copernicus.org/articles/6/2581/2006/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
