Structure dynamics of the proton in liquid water probed with terahertz time-domain spectroscopy
| Authors |
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| Publication date |
2009
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| Journal |
Physical Review Letters
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| Volume | Issue number |
102 | 19
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| Pages (from-to) |
198303
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| Number of pages |
4
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| Organisations |
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Faculty of Science (FNWI) - Van 't Hoff Institute for Molecular Sciences (HIMS)
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| Abstract |
We study the hydration of protons in liquid water using terahertz time-domain spectroscopy and polarization-resolved femtosecond midinfrared pump-probe spectroscopy. We observe that the addition of protons leads to a very strong decrease of the dielectric response of liquid water that corresponds to 19±2 water molecules per dissolved proton. This depolarization results from water molecules (~4) that are irrotationally bound to the proton and from the motion of water (corresponding to the response of ~15 water molecules) involved in the transfer of the proton charge.
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| Document type |
Article
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| Note |
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| Published at |
https://doi.org/10.1103/PhysRevLett.102.198303
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