The Library
Ultrafast dissociation dynamics of 2-Ethylpyrrole
Tools
Cole-Filipiak, Neil C., Staniforth, Michael, d. N. Rodrigues, Natércia, Peperstraete, Yoann and Stavros, Vasilios G. (2017) Ultrafast dissociation dynamics of 2-Ethylpyrrole. The Journal of Physical Chemistry A, 121 (5). pp. 969-976. doi:10.1021/acs.jpca.6b12228 ISSN 1089-5639.
|
PDF
WRAP_acs%2Ejpca%2E6b12228.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1443Kb) | Preview |
|
PDF
WRAP_ch-110117-2ep_resubmisison.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only - Requires a PDF viewer. Download (1429Kb) |
Official URL: http://dx.doi.org/10.1021/acs.jpca.6b12228
Abstract
To explore the effects of ring substitution on dissociation dynamics, the primary photochemistry of 2-ethylpyrrole has been explored using ultrafast ion imaging techniques. Photoexcitation to the S1 state, a πσ* state, in the range of 238 to 265 nm results in cleavage of the N–H bond with an H-atom appearance lifetime of ca. 70 fs. The insensitivity of this lifetime to photon energy, combined with a small kinetic isotope effect, suggests that tunneling does not play a major role in N–H bond cleavage. Total kinetic energy release spectra reveal modest vibrational excitation in the radical counter-fragment, increasing with photon energy. At wavelengths ≤ 248 nm a second, low kinetic energy H-atom loss mechanism becomes available with an appearance lifetime of approximately 1.5 ps and possibly due to the population of higher lying 1ππ* states.
Item Type: | Journal Article | ||||||
---|---|---|---|---|---|---|---|
Subjects: | Q Science > QD Chemistry | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||
Library of Congress Subject Headings (LCSH): | Dissociation, Photochemistry, Pyrroles | ||||||
Journal or Publication Title: | The Journal of Physical Chemistry A | ||||||
Publisher: | American Chemical Society | ||||||
ISSN: | 1089-5639 | ||||||
Official Date: | 10 January 2017 | ||||||
Dates: |
|
||||||
Volume: | 121 | ||||||
Number: | 5 | ||||||
Page Range: | pp. 969-976 | ||||||
DOI: | 10.1021/acs.jpca.6b12228 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 11 January 2017 | ||||||
Date of first compliant Open Access: | 30 March 2017 | ||||||
Funder: | Leverhulme Trust (LT), Engineering and Physical Sciences Research Council (EPSRC), École normale supérieure Paris-Saclay, Royal Society (Great Britain) | ||||||
Grant number: | EP/J007153 (EPSRC) |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year