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Issue 14, 2002
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Resonant infrared laser-induced desorption of CD3F condensed on NaCl(100)

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Abstract

In investigations of the dynamics of the desorption of molecules from surfaces, a selective excitation of specific molecular vibrations is desirable. We here report studies on the infrared laser-induced desorption of CD3F condensed on the NaCl(100) single crystal surface, in which the intramolecular vibrations of the CD3F molecules are directly excited. Desorption of the intact molecules is monitored using electron impact ionization followed by mass-selective detection in a quadrupole mass spectrometer. Desorption only occurs when the excitation laser is at 9.0, 10.5, 9.4, or 11.0 µm, corresponding to excitation on the ν2, ν3, ν5, and ν6 modes of CD3F. An analysis of the time-of-flight spectra as a function of the laser fluence is presented. Different desorption mechanisms are discussed.

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Publication details

The article was received on 22 Feb 2002, accepted on 24 Apr 2002 and first published on 11 Jun 2002


Article type: Paper
DOI: 10.1039/B201921C
Citation: Phys. Chem. Chem. Phys., 2002,4, 3448-3452
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    Resonant infrared laser-induced desorption of CD3F condensed on NaCl(100)

    B. Redlich, H. Zacharias, G. Meijer and G. von Helden, Phys. Chem. Chem. Phys., 2002, 4, 3448
    DOI: 10.1039/B201921C

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