Rubio-Lago, L;
Amaral, GA;
Arregui, A;
Izquierdo, JG;
Wang, F;
Zaouris, D;
Kitsopoulos, TN;
(2007)
Slice imaging of the photodissociation of acetaldehyde at 248 nm. Evidence of a roaming mechanism.
Physical Chemistry Chemical Physics
, 9
(46)
pp. 6123-6127.
10.1039/b708310f.
Text
PCCP, Acetaldehyde.pdf - Published Version Access restricted to UCL open access staff Download (612kB) |
Abstract
The photodissociation of acetaldehyde in the molecular channel yielding CO and CH4 at 248 nm has been studied, probing different rotational states of the CO(n = 0) fragment by slice ion imaging using a 2+1 REMPI scheme at around 230 nm. From the slice images, clear evidence of the co-existence of two different mechanisms has been obtained. One of the mechanisms is consistent with the well-studied conventional transition state in which CO products appear rotationally excited, and the second is consistent with a roaming mechanism. This roaming mechanism is characterized by a low rotational energy disposal into the CO fragment as well as by a very low kinetic energy release, corresponding to a high internal energy in the CH4 counter-fragment.
Type: | Article |
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Title: | Slice imaging of the photodissociation of acetaldehyde at 248 nm. Evidence of a roaming mechanism |
DOI: | 10.1039/b708310f |
Publisher version: | http://dx.doi.org/10.1039/b708310f |
Language: | English |
UCL classification: | UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
URI: | https://discovery.ucl.ac.uk/id/eprint/1475108 |
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