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- W3173770976 abstract "In this work, a series of analyses are performed on ab initio molecular dynamics simulations of a hydrated excess proton in water to quantify the relative occurrence of concerted hopping events and “rattling” events and thus to further elucidate the hopping mechanism of proton transport in water. Contrary to results reported in certain earlier papers, the new analysis finds that concerted hopping events do occur in all simulations but that the majority of events are the product of proton rattling, where the excess proton will rattle between two or more waters. The results are consistent with the proposed “special-pair dance” model of the hydrated excess proton wherein the acceptor water molecule for the proton transfer will quickly change (resonate between three equivalent special pairs) until a decisive proton hop occurs. To remove the misleading effect of simple rattling, a filter was applied to the trajectory such that hopping events that were followed by back hops to the original water are not counted. A steep reduction in the number of multiple hopping events is found when the filter is applied, suggesting that many multiple hopping events that occur in the unfiltered trajectory are largely the product of rattling, contrary to prior suggestions. Comparing the continuous correlation function of the filtered and unfiltered trajectories, we find agreement with experimental values for the proton hopping time and Eigen–Zundel interconversion time, respectively." @default.
- W3173770976 created "2021-07-05" @default.
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- W3173770976 date "2021-05-20" @default.
- W3173770976 modified "2023-10-10" @default.
- W3173770976 title "The hopping mechanism of the hydrated excess proton and its contribution to proton diffusion in water" @default.
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- W3173770976 doi "https://doi.org/10.1063/5.0040758" @default.
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