Abstract
We present the first measurement of the thermal desorption kinetics of methyl radicals. Neutral methyl radicals are photochemically produced within a methyl iodide film condensed on MgO(100). A substantial fraction become trapped through inelastic collisions with the film and thermalize to the film temperature prior to desorption. Novel residence time measurements are made by comparing neutral and ion flight times in a time-of-flight spectrometer. An Arrhenius analysis of methyl radical residence times provides a desorption barrier of 2.5±0.5kcalmol-1 and a pre-factor of 1010±1s-1.
| Original language | English |
|---|---|
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | Chemical Physics Letters |
| Volume | 334 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - Feb 2 2001 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Spectroscopy
- Atomic and Molecular Physics, and Optics
Cite this
Surface residence time measurements of transient methyl radicals. / Briggman, K. A.; Stair, Peter C; Weitz, E.
In: Chemical Physics Letters, Vol. 334, No. 1-3, 02.02.2001, p. 1-6.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Surface residence time measurements of transient methyl radicals
AU - Briggman, K. A.
AU - Stair, Peter C
AU - Weitz, E.
PY - 2001/2/2
Y1 - 2001/2/2
N2 - We present the first measurement of the thermal desorption kinetics of methyl radicals. Neutral methyl radicals are photochemically produced within a methyl iodide film condensed on MgO(100). A substantial fraction become trapped through inelastic collisions with the film and thermalize to the film temperature prior to desorption. Novel residence time measurements are made by comparing neutral and ion flight times in a time-of-flight spectrometer. An Arrhenius analysis of methyl radical residence times provides a desorption barrier of 2.5±0.5kcalmol-1 and a pre-factor of 1010±1s-1.
AB - We present the first measurement of the thermal desorption kinetics of methyl radicals. Neutral methyl radicals are photochemically produced within a methyl iodide film condensed on MgO(100). A substantial fraction become trapped through inelastic collisions with the film and thermalize to the film temperature prior to desorption. Novel residence time measurements are made by comparing neutral and ion flight times in a time-of-flight spectrometer. An Arrhenius analysis of methyl radical residence times provides a desorption barrier of 2.5±0.5kcalmol-1 and a pre-factor of 1010±1s-1.
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U2 - 10.1016/S0009-2614(00)01448-2
DO - 10.1016/S0009-2614(00)01448-2
M3 - Article
VL - 334
SP - 1
EP - 6
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 1-3
ER -