Direct tracking of ultrafast proton transfer in water dimers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F23%3A43927292" target="_blank" >RIV/60461373:22340/23:43927292 - isvavai.cz</a>
Result on the web
<a href="https://www.science.org/doi/10.1126/sciadv.adg7864" target="_blank" >https://www.science.org/doi/10.1126/sciadv.adg7864</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1126/sciadv.adg7864" target="_blank" >10.1126/sciadv.adg7864</a>
Alternative languages
Result language
angličtina
Original language name
Direct tracking of ultrafast proton transfer in water dimers
Original language description
Upon ionization, water forms a highly acidic radical cation H2O+· that undergoes ultrafast proton transfer (PT)—a pivotal step in water radiation chemistry, initiating the production of reactive H3O+, OH⋅ radicals, and a (hydrated) electron. Until recently, the time scales, mechanisms, and state-dependent reactivity of ultrafast PT could not be directly traced. Here, we investigate PT in water dimers using time-resolved ion coincidence spectroscopy applying a free-electron laser. An extreme ultraviolet (XUV) pump photon initiates PT, and only dimers that have undergone PT at the instance of the ionizing XUV probe photon result in distinct H3O+ + OH+ pairs. By tracking the delay-dependent yield and kinetic energy release of these ion pairs, we measure a PT time of (55 ± 20) femtoseconds and image the geometrical rearrangement of the dimer cations during and after PT. Our direct measurement shows good agreement with nonadiabatic dynamics simulations for the initial PT and allows us to benchmark nonadiabatic theory.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GX21-26601X" target="_blank" >GX21-26601X: Probing and Transforming Matter by Electrons in Liquid Jets</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Science Advances
ISSN
2375-2548
e-ISSN
2375-2548
Volume of the periodical
9
Issue of the periodical within the volume
28
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
"eadg7864"
UT code for WoS article
001033220400010
EID of the result in the Scopus database
2-s2.0-85164541885