Mapping the structural dynamics of water dissociation.

Mapping the structural dynamics of water dissociation.
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DOI:
10.1126/science.abk0229
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发表时间:
2021-10
期刊:
影响因子:
56.9
通讯作者:
Zhong, Dongping
Zhong, Dongping
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Cao, Jianming;Wang, Xuan;Zhong, Dongping

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Achieving a thorough understanding of reactions in liquids requires measurements at the molecular level and with sufficient time resolution to map the dynamics . These studies could resolve the structure-function correlation of these reactions . On page 92 of this issue, Linet al.used liquid-phase ultrafast electron diffraction (UED) to capture the transient structure of the short-lived OH(H3O+) radical-cation pairs produced in photoionization of water at atomic spatiotemporal resolution. The pairs dissociate into an OH radical and an H3O+cation in ∼250 fs. In addition, a concomitant ultrafast heating of the liquid water was recorded by tracing the structural change of the heated water. These observations reveal the transient reaction intermediates and the dynamic flow of energy from ionization centers to water, as can occur during radiolysis, a reaction that is ubiquitous in nature.
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