Issue 19, 2011
From the journal:

Physical Chemistry Chemical Physics

Visualizing hydrogen atoms migrating in acetylene dication by time-resolved three-body and four-body Coulomb explosion imaging

Akitaka Matsuda,ab   Mizuho Fushitani,a   Eiji J. Takahashi†b  and  Akiyoshi Hishikawa*ab  

* Corresponding authors

a Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
E-mail: hishi@chem.nagoya-u.ac.jp

b Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi 444-8585, Japan

Abstract

The visualization of ultrafast isomerization of deuterated acetylene dication (C2D22+) is demonstrated by time-resolved Coulomb explosion imaging with sub-10 fs intense laser pulses (9 fs, 0.13 PW cm−2, 800 nm). The Coulomb explosion imaging monitoring the three-body explosion process, C2D23+ → D+ + C+ + CD+, as a function of the delay between the pump and probe pulses revealed that the migration of a deuterium atom proceeds in a recurrent manner; One of the deuterium atoms first shifts from one carbon site to the other in a short timescale (∼90 fs), and then migrates back to the original carbon site by 280 fs, in competition with the molecular dissociation. Correlated motion of the two deuterium atoms associated with the hydrogen migration and structural deformation to non-planar geometry are identified by the time-resolved four-body Coulomb explosion imaging, C2D24+ → D+ + C+ + C+ + D+.

Graphical abstract: Visualizing hydrogen atoms migrating in acetylene dication by time-resolved three-body and four-body Coulomb explosion imaging

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Article information

DOI
https://doi.org/10.1039/C0CP02333G
Article type
Paper
Submitted
31 Oct 2010
Accepted
14 Jan 2011
First published
28 Mar 2011

Phys. Chem. Chem. Phys., 2011,13, 8697-8704

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Visualizing hydrogen atoms migrating in acetylene dication by time-resolved three-body and four-body Coulomb explosion imaging

A. Matsuda, M. Fushitani, E. J. Takahashi and A. Hishikawa, Phys. Chem. Chem. Phys., 2011, 13, 8697 DOI: 10.1039/C0CP02333G

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