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Observation of the fastest chemical processes in the radiolysis of water.
- Source :
-
Science (New York, N.Y.) [Science] 2020 Jan 10; Vol. 367 (6474), pp. 179-182. - Publication Year :
- 2020
-
Abstract
- Elementary processes associated with ionization of liquid water provide a framework for understanding radiation-matter interactions in chemistry and biology. Although numerous studies have been conducted on the dynamics of the hydrated electron, its partner arising from ionization of liquid water, H <subscript>2</subscript> O <superscript>+</superscript> , remains elusive. We used tunable femtosecond soft x-ray pulses from an x-ray free electron laser to reveal the dynamics of the valence hole created by strong-field ionization and to track the primary proton transfer reaction giving rise to the formation of OH. The isolated resonance associated with the valence hole (H <subscript>2</subscript> O <superscript>+</superscript> /OH) enabled straightforward detection. Molecular dynamics simulations revealed that the x-ray spectra are sensitive to structural dynamics at the ionization site. We found signatures of hydrated-electron dynamics in the x-ray spectrum.<br /> (Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)
Details
- Language :
- English
- ISSN :
- 1095-9203
- Volume :
- 367
- Issue :
- 6474
- Database :
- MEDLINE
- Journal :
- Science (New York, N.Y.)
- Publication Type :
- Academic Journal
- Accession number :
- 31919219
- Full Text :
- https://doi.org/10.1126/science.aaz4740