skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Tracking dissociation dynamics of strong-field ionized 1,2-dibromoethane with femtosecond XUV transient absorption spectroscopy

Abstract

Using femtosecond time-resolved extreme ultraviolet absorption spectroscopy, the dissociation dynamics of the haloalkane 1,2-dibromoethane (DBE) have been explored following strong field ionization by femtosecond near infrared pulses at intensities between 7.5 × 10 13 and 2.2 × 10 14 W cm -2. The major elimination products are bromine atoms in charge states of 0, +1, and +2. The charge state distribution is strongly dependent on the incident NIR intensity. While the yield of neutral fragments is essentially constant for all measurements, charged fragment yields grow rapidly with increasing NIR intensities with the most pronounced effect observed for Br ++. However, the appearance times of all bromine fragments are independent of the incident field strength; these are found to be 320 fs, 70 fs, and 30 fs for Br˙, Br +, and Br ++, respectively. Transient molecular ion features assigned to DBE + and DBE ++ are observed, with dynamics linked to the production of Br + products. Neutral Br˙ atoms are produced on a timescale consistent with dissociation of DBE + ions on a shallow potential energy surface. The appearance of Br + ions by dissociative ionization is also seen, as evidenced by the simultaneous decay of a DBE +more » ionic species. Dicationic Br ++ products emerge within the instrument response time, presumably from Coulomb explosion of triply charged DBE.« less

Authors:
 [1];  [1];  [1];  [2];  [3]
  1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Chemical Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Chemistry
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Chemical Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Chemistry and Dept. of Physics
  3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Chemical Sciences Division
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; Austrian Science Fund (FWF)
OSTI Identifier:
1439187
Grant/Contract Number:  
AC02-05CH11231; J 3580-N20
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Chemistry Chemical Physics. PCCP (Print)
Additional Journal Information:
Journal Name: Physical Chemistry Chemical Physics. PCCP (Print); Journal Volume: 18; Journal Issue: 21; Related Information: © 2016 the Owner Societies.; Journal ID: ISSN 1463-9076
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Chatterley, Adam S., Lackner, Florian, Neumark, Daniel M., Leone, Stephen R., and Gessner, Oliver. Tracking dissociation dynamics of strong-field ionized 1,2-dibromoethane with femtosecond XUV transient absorption spectroscopy. United States: N. p., 2016. Web. doi:10.1039/c6cp02598f.
Chatterley, Adam S., Lackner, Florian, Neumark, Daniel M., Leone, Stephen R., & Gessner, Oliver. Tracking dissociation dynamics of strong-field ionized 1,2-dibromoethane with femtosecond XUV transient absorption spectroscopy. United States. doi:10.1039/c6cp02598f.
Chatterley, Adam S., Lackner, Florian, Neumark, Daniel M., Leone, Stephen R., and Gessner, Oliver. Wed . "Tracking dissociation dynamics of strong-field ionized 1,2-dibromoethane with femtosecond XUV transient absorption spectroscopy". United States. doi:10.1039/c6cp02598f. https://www.osti.gov/servlets/purl/1439187.
@article{osti_1439187,
title = {Tracking dissociation dynamics of strong-field ionized 1,2-dibromoethane with femtosecond XUV transient absorption spectroscopy},
author = {Chatterley, Adam S. and Lackner, Florian and Neumark, Daniel M. and Leone, Stephen R. and Gessner, Oliver},
abstractNote = {Using femtosecond time-resolved extreme ultraviolet absorption spectroscopy, the dissociation dynamics of the haloalkane 1,2-dibromoethane (DBE) have been explored following strong field ionization by femtosecond near infrared pulses at intensities between 7.5 × 1013 and 2.2 × 1014 W cm-2. The major elimination products are bromine atoms in charge states of 0, +1, and +2. The charge state distribution is strongly dependent on the incident NIR intensity. While the yield of neutral fragments is essentially constant for all measurements, charged fragment yields grow rapidly with increasing NIR intensities with the most pronounced effect observed for Br++. However, the appearance times of all bromine fragments are independent of the incident field strength; these are found to be 320 fs, 70 fs, and 30 fs for Br˙, Br+, and Br++, respectively. Transient molecular ion features assigned to DBE+ and DBE++ are observed, with dynamics linked to the production of Br+ products. Neutral Br˙ atoms are produced on a timescale consistent with dissociation of DBE+ ions on a shallow potential energy surface. The appearance of Br+ ions by dissociative ionization is also seen, as evidenced by the simultaneous decay of a DBE+ ionic species. Dicationic Br++ products emerge within the instrument response time, presumably from Coulomb explosion of triply charged DBE.},
doi = {10.1039/c6cp02598f},
journal = {Physical Chemistry Chemical Physics. PCCP (Print)},
number = 21,
volume = 18,
place = {United States},
year = {Wed May 11 00:00:00 EDT 2016},
month = {Wed May 11 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Control of Chemical Reactions by Feedback-Optimized Phase-Shaped Femtosecond Laser Pulses
journal, October 1998


The dynamics of small molecules in intense laser fields
journal, April 2004