Photodissociation of aqueous I3− observed with liquid-phase ultrafast mega-electron-volt electron diffraction

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

doi:10.1063/4.0000051

Photodissociation of aqueous I3− observed with liquid-phase ultrafast mega-electron-volt electron diffraction

Journal Article · Mon Dec 28 00:00:00 EST 2020 · Structural Dynamics

DOI:https://doi.org/10.1063/4.0000051· OSTI ID:2565100

; ; ; ; ; ; ; Shen, X.; ; ; ;

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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); SLAC National Accelerator Laboratory, Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

Grant/Contract Number:: AC02-05CH11231; AC02-76SF00515; SC0014170

OSTI ID:: 2565100

Alternate ID(s):: OSTI ID: 1728465
OSTI ID: 1749914
OSTI ID: 1749962

Journal Information:: Structural Dynamics, Journal Name: Structural Dynamics Journal Issue: 6 Vol. 7; ISSN 2329-7778

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Photodissociation of aqueous I3− observed with liquid-phase ultrafast mega-electron-volt electron diffraction

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