TY - JOUR
T1 - Surface residence time measurements of transient methyl radicals
AU - Briggman, K. A.
AU - Stair, P. C.
AU - Weitz, E.
N1 - Funding Information:
The authors gratefully acknowledge support for this work by the National Science Foundation under Grant No. CHE-9305937. K.A.B. wishes to thank Frederick Northrup and Peter Doan for stimulating discussions and to acknowledge a National Physical Science Consortium fellowship.
Copyright:
Copyright 2005 Elsevier B.V., All rights reserved.
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.
UR - http://www.scopus.com/inward/record.url?scp=0001870877&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001870877&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(00)01448-2
DO - 10.1016/S0009-2614(00)01448-2
M3 - Article
AN - SCOPUS:0001870877
VL - 334
SP - 1
EP - 6
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 1-3
ER -