Vertical transition energies vs. absorption maxima: illustration with the UV absorption spectrum of ethylene

We revisit the validity of making a direct comparison between measured absorption maxima and computed vertical transition energies within 0.1eV to calibrate an excited-state level of theory. This is illustrated on the UV absorption spectrum of ethylene for which the usual experimental values of 7.66...

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Hauptverfasser: Lasorne, Benjamin (VerfasserIn) , Jornet-Somoza, Joaquim (VerfasserIn) , Meyer, Hans-Dieter (VerfasserIn) , Lauvergnat, David (VerfasserIn) , Robb, Michael A. (VerfasserIn) , Gatti, Fabien (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2014
In: Spectrochimica acta. A, Molecular and biomolecular spectroscopy
Year: 2013, Jahrgang: 119, Pages: 52-58
ISSN:1873-3557
DOI:10.1016/j.saa.2013.04.078
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.saa.2013.04.078
Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S1386142513004186
Volltext
Verfasserangaben:Benjamin Lasorne, Joaquim Jornet-Somoza, Hans-Dieter Meyer, David Lauvergnat, Michael A. Robb, Fabien Gatti

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520 |a We revisit the validity of making a direct comparison between measured absorption maxima and computed vertical transition energies within 0.1eV to calibrate an excited-state level of theory. This is illustrated on the UV absorption spectrum of ethylene for which the usual experimental values of 7.66eV (V←N) and 7.11eV (R(3s)←N) cannot be compared directly to the results of electronic structure calculations for two very different reasons. After validation of our level of theory against experimental data, a new experimental reference of 7.28eV is suggested for benchmarking the Rydberg state, and the often-cited average transition energy (7.80eV) is confirmed as a safer estimate for the valence state. 
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