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VUV photon induced fluorescence study of SF5CF3

Alvarez Ruiz, Jesus and Kivimaki, Antti and Stankiewicz, Marek and Melero Garcia, Emilio and Coreno, Marcello and Ali, S. and Koperski, Jaroslaw and Rachlew, Elisabeth and Vall-llosera i Serrano, Gemma and Feyer, Vitaliy and Tuckett, R. P. (2006) VUV photon induced fluorescence study of SF5CF3. Physical Chemistry Chemical Physics, 8 (44). pp. 5199-5206. ISSN 1463-9076

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URL of Published Version: http://dx.doi.org/10.1039/b609314k

Identification Number/DOI: doi:10.1039/b609314k

The interaction of SF\(_5\)CF\(_3\) with vacuum-UV radiation has been investigated by photon induced fluorescence spectroscopy. Total fluorescence yield and dispersed fluorescence spectra of SF\(_5\)CF\(_3\) were recorded in the 200-1000 nm fluorescence window. In all cases, the fluorescence spectra resemble those of CF\(_3\)X (X=H, F, Cl, and Br) molecules. At photon energies below 20 eV, the emission is attributed to the excited CF\(_3\) and CF\(_2\) fragments. The threshold for the CF\(_3\) emission is 10.2 ± 0.2 eV, giving an upper-limit estimate for the SF\(_5\)-CF\(_3\) bond dissociation energy of 3.9 ± 0.3 eV. The excitation functions of the CF3 and CF2 emissions were measured in the photon energy range 13.6 – 27.0 eV. The resonant structures observed in SF\(_5\)CF\(_3\) are attributed to electronic transitions from valence to Rydberg orbitals, following similar assignments in CF\(_3\)X molecules. The photoabsorption spectrum of SF\(_5\)CF\(_3\) shows features at the same energies, indicating a strong contribution from Rydberg excitations.

Type of Work:Article
Date:2006 (Publication)
School/Faculty:Schools (1998 to 2008) > School of Chemical Sciences
Department:School of Chemistry
Subjects:QD Chemistry
QC Physics
Institution:University of Birmingham
Copyright Holders:The authors, Royal Society of Chemistry
ID Code:692
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