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Relaxation Dynamics in Photoexcited Chiral Molecules Studied by Time-Resolved Photoelectron Circular Dichroism: Toward Chiral Femtochemistry
[Image: see text] Unravelling the main initial dynamics responsible for chiral recognition is a key step in the understanding of many biological processes. However, this challenging task requires a sensitive enantiospecific probe to investigate molecular dynamics on their natural femtosecond time sc...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2016
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5116763/ https://www.ncbi.nlm.nih.gov/pubmed/27786493 http://dx.doi.org/10.1021/acs.jpclett.6b02065 |
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author | Comby, Antoine Beaulieu, Samuel Boggio-Pasqua, Martial Descamps, Dominique Légaré, Francois Nahon, Laurent Petit, Stéphane Pons, Bernard Fabre, Baptiste Mairesse, Yann Blanchet, Valérie |
author_facet | Comby, Antoine Beaulieu, Samuel Boggio-Pasqua, Martial Descamps, Dominique Légaré, Francois Nahon, Laurent Petit, Stéphane Pons, Bernard Fabre, Baptiste Mairesse, Yann Blanchet, Valérie |
author_sort | Comby, Antoine |
collection | PubMed |
description | [Image: see text] Unravelling the main initial dynamics responsible for chiral recognition is a key step in the understanding of many biological processes. However, this challenging task requires a sensitive enantiospecific probe to investigate molecular dynamics on their natural femtosecond time scale. Here we show that, in the gas phase, the ultrafast relaxation dynamics of photoexcited chiral molecules can be tracked by recording time-resolved photoelectron circular dichroism (TR-PECD) resulting from the photoionization by a circularly polarized probe pulse. A large forward–backward asymmetry along the probe propagation axis is observed in the photoelectron angular distribution. Its evolution with pump–probe delay reveals ultrafast dynamics that are inaccessible in the angle-integrated photoelectron spectrum or via the usual electron emission anisotropy parameter (β). PECD, which originates from the electron scattering in the chiral molecular potential, appears as a new sensitive observable for ultrafast molecular dynamics in chiral systems. |
format | Online Article Text |
id | pubmed-5116763 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-51167632016-11-22 Relaxation Dynamics in Photoexcited Chiral Molecules Studied by Time-Resolved Photoelectron Circular Dichroism: Toward Chiral Femtochemistry Comby, Antoine Beaulieu, Samuel Boggio-Pasqua, Martial Descamps, Dominique Légaré, Francois Nahon, Laurent Petit, Stéphane Pons, Bernard Fabre, Baptiste Mairesse, Yann Blanchet, Valérie J Phys Chem Lett [Image: see text] Unravelling the main initial dynamics responsible for chiral recognition is a key step in the understanding of many biological processes. However, this challenging task requires a sensitive enantiospecific probe to investigate molecular dynamics on their natural femtosecond time scale. Here we show that, in the gas phase, the ultrafast relaxation dynamics of photoexcited chiral molecules can be tracked by recording time-resolved photoelectron circular dichroism (TR-PECD) resulting from the photoionization by a circularly polarized probe pulse. A large forward–backward asymmetry along the probe propagation axis is observed in the photoelectron angular distribution. Its evolution with pump–probe delay reveals ultrafast dynamics that are inaccessible in the angle-integrated photoelectron spectrum or via the usual electron emission anisotropy parameter (β). PECD, which originates from the electron scattering in the chiral molecular potential, appears as a new sensitive observable for ultrafast molecular dynamics in chiral systems. American Chemical Society 2016-10-27 2016-11-17 /pmc/articles/PMC5116763/ /pubmed/27786493 http://dx.doi.org/10.1021/acs.jpclett.6b02065 Text en Copyright © 2016 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Comby, Antoine Beaulieu, Samuel Boggio-Pasqua, Martial Descamps, Dominique Légaré, Francois Nahon, Laurent Petit, Stéphane Pons, Bernard Fabre, Baptiste Mairesse, Yann Blanchet, Valérie Relaxation Dynamics in Photoexcited Chiral Molecules Studied by Time-Resolved Photoelectron Circular Dichroism: Toward Chiral Femtochemistry |
title | Relaxation Dynamics in Photoexcited Chiral Molecules
Studied by Time-Resolved Photoelectron Circular Dichroism: Toward
Chiral Femtochemistry |
title_full | Relaxation Dynamics in Photoexcited Chiral Molecules
Studied by Time-Resolved Photoelectron Circular Dichroism: Toward
Chiral Femtochemistry |
title_fullStr | Relaxation Dynamics in Photoexcited Chiral Molecules
Studied by Time-Resolved Photoelectron Circular Dichroism: Toward
Chiral Femtochemistry |
title_full_unstemmed | Relaxation Dynamics in Photoexcited Chiral Molecules
Studied by Time-Resolved Photoelectron Circular Dichroism: Toward
Chiral Femtochemistry |
title_short | Relaxation Dynamics in Photoexcited Chiral Molecules
Studied by Time-Resolved Photoelectron Circular Dichroism: Toward
Chiral Femtochemistry |
title_sort | relaxation dynamics in photoexcited chiral molecules
studied by time-resolved photoelectron circular dichroism: toward
chiral femtochemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5116763/ https://www.ncbi.nlm.nih.gov/pubmed/27786493 http://dx.doi.org/10.1021/acs.jpclett.6b02065 |
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