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Observation of the fastest chemical processes in the radiolysis of water.
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- المؤلفون: 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.
- المصدر:
Science. 1/10/2020, Vol. 367 Issue 6474, p179-182. 4p. 1 Diagram, 2 Graphs.
- معلومة اضافية
- الموضوع:
- نبذة مختصرة :
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]
- نبذة مختصرة :
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