Observation of the fastest chemical processes in the radiolysis of water.
Saved in:
| Title: | Observation of the fastest chemical processes in the radiolysis of water. |
|---|---|
| Authors: | Loh, Z.-H., Doumy, G., Arnold, C., Kjellsson, L., Southworth, S. H., Haddad, A. Al, Kumagai, Y., Tu, M.-F., Ho, P. J., March, A. M., Schaller, R. D., Yusof, M. S. Bin Mohd, Debnath, T., Simon, M., Welsch, R., Inhester, L., Khalili, K., Nanda, K., Krylov, A. I., Moeller, S. |
| Source: | Science (pre-March 2025). 1/10/2020, Vol. 367 Issue 6474, p179-182. 4p. 1 Diagram, 2 Graphs. |
| Subjects: | Radiolysis, Free electron lasers, Molecular dynamics, X-ray spectra, Ionization (Atomic physics) |
| 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, H2O+, 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 (H2O+/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. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
|
Full text is not displayed to guests.
Login for full access.
|
|
| 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, H2O+, 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 (H2O+/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. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 00368075 |
| DOI: | 10.1126/science.aaz4740 |
