Origin of ion selectivity at the air/water interface
- 22 December 2014
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Physical Chemistry Chemical Physics
- Vol. 17 (6) , 4311-4318
Abstract
A snapshot of a water droplet consisting of Cs + and I − ions with their hydration structures displayed. I − is hydrated anisotropically and the water–water hydrogen bonds in the first hydration shell are hindered. The anions have quite weak interactions with non-hydrogen-bonded water molecules in the first hydration shell, making it easier for them to leave the site. In contrast, cations obtain more stable hydration shells with an increase in their size.Keywords
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