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Exploring the time scales of H-atom elimination from photoexcited indole
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Iqbal, Azhar and Stavros, Vasillios G. (2010) Exploring the time scales of H-atom elimination from photoexcited indole. Journal of Physical Chemistry A, Vol.114 (No.1). pp. 68-72. doi:10.1021/jp908195k ISSN 1089-5639.
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Official URL: http://dx.doi.org/10.1021/jp908195k
Abstract
Recent spectroscopic measurements have shown that following excitation of indole molecules above the (1)pi pi*-(1)pi sigma* conical intersection, photoinduced N-H bond cleavage results in a range of H-atom kinetic energy release. H-atoms with large amounts of kinetic energy were attributed to direct dissociation whereas those with low kinetic energy were attributed to indirect pathways such as statistical unimolecular decay. With use of a combination of femtosecond pump-probe spectroscopy and velocity map ion-imaging techniques, both energy and time-resolved photoinduced H-atom elimination at 200 nm has been measured. The results show that H-atoms with both high and low kinetic energies are generated on an ultrafast time scale, <200 fs, suggesting that on the time frame of our measurements (<200 ps) there appears to be a direct route to H-atom formation yielding H-atoms with low kinetic energies.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QD Chemistry | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
| Library of Congress Subject Headings (LCSH): | Photochemistry, Indole, Molecular dynamics, Elimination reactions | ||||
| Journal or Publication Title: | Journal of Physical Chemistry A | ||||
| Publisher: | American Chemical Society | ||||
| ISSN: | 1089-5639 | ||||
| Official Date: | 14 January 2010 | ||||
| Dates: |
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| Volume: | Vol.114 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 5 | ||||
| Page Range: | pp. 68-72 | ||||
| DOI: | 10.1021/jp908195k | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Funder: | Royal Society (Great Britain), Engineering and Physical Sciences Research Council (EPSRC), University of Warwick | ||||
| Grant number: | EP/E011187 (EPSRC) |
Data sourced from Thomson Reuters' Web of Knowledge
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