Photodissociation of aqueous 



I

3

− observed with liquid-phase ultrafast mega-electron-volt electron diffraction

K. Ledbetter; E. Biasin; J. P. F. Nunes; M. Centurion; K. J. Gaffney; M. Kozina; M.-F. Lin; X. Shen; J. Yang; X. J. Wang; T. J. A. Wolf; A. A. Cordones

doi:10.1063/4.0000051

Structural Dynamics (Nov 2020)

Photodissociation of aqueous I 3 − observed with liquid-phase ultrafast mega-electron-volt electron diffraction

K. Ledbetter,
E. Biasin,
J. P. F. Nunes,
M. Centurion,
K. J. Gaffney,
M. Kozina,
M.-F. Lin,
X. Shen,
J. Yang,
X. J. Wang,
T. J. A. Wolf,
A. A. Cordones

Affiliations

K. Ledbetter: Department of Physics, Stanford University, Stanford, California 94305, USA
E. Biasin: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
J. P. F. Nunes: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
M. Centurion: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA
K. J. Gaffney: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
M. Kozina: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
M.-F. Lin: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
X. Shen: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
J. Yang: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
X. J. Wang: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
T. J. A. Wolf: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
A. A. Cordones: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

DOI: https://doi.org/10.1063/4.0000051
Journal volume & issue: Vol. 7, no. 6
pp. 064901 – 064901-10

Abstract

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Developing femtosecond resolution methods for directly observing structural dynamics is critical to understanding complex photochemical reaction mechanisms in solution. We have used two recent developments, ultrafast mega-electron-volt electron sources and vacuum compatible sub-micron thick liquid sheet jets, to enable liquid-phase ultrafast electron diffraction (LUED). We have demonstrated the viability of LUED by investigating the photodissociation of tri-iodide initiated with a 400 nm laser pulse. This has enabled the average speed of the bond expansion to be measured during the first 750 fs of dissociation and the geminate recombination to be directly captured on the picosecond time scale.

Published in Structural Dynamics

ISSN: 2329-7778 (Online)
Publisher: AIP Publishing LLC and ACA
Country of publisher: United States
LCC subjects: Science: Chemistry: Crystallography
Website: http://sd.aip.org

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