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Eden, S.; Barc, B.; Mason, N. J.; Hoffmann, S. V.; Nunes, Y. and Limão-Vieira, P.
(2009).
DOI: https://doi.org/10.1016/j.chemphys.2009.10.010
Abstract
The VUV spectrum of C2Cl4 is reported in the energy range 3.8-10.8 eV (325-115 nm). Several photoabsorption features are observed for the first time, including a very weak low-lying band which is provisionally attributed to a π → π* triplet transition. Recent ab initio calculations of the molecule’s electronic transitions [Arulmozhiraja et al. J. Chem. Phys. 129 (2008) 174506] provide the basis for the present assignments below 8.5 eV. An extended ndπ series is proposed to account for several higher-energy Rydberg bands. The identification of vibrational structure, dominated by symmetric C=C and CCl2 stretching in excitations from the HOMO, largely agrees with previous spectroscopic studies. The present absolute photoabsorption cross sections cover a wider energy range than the previous measurements and are used to calculate UV photolysis lifetimes of this aeronomic molecule at altitudes between 20 and 50 km.
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About
- Item ORO ID
- 18793
- Item Type
- Journal Item
- ISSN
- 0301-0104
- Keywords
- Photoabsorption; C2Cl4; tetrachloroethylene; electronic excitation; vibrational excitation; Rydberg series; photolysis
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Research Group
- Physics
- Copyright Holders
- © 2009 Elsevier B.V.
- Depositing User
- Colin Smith