Cooperativity in Ion Hydration

+ See all authors and affiliations

Science  21 May 2010:
Vol. 328, Issue 5981, pp. 1006-1009
DOI: 10.1126/science.1183512

You are currently viewing the abstract.

View Full Text


Despite prolonged scientific efforts to unravel the effects of ions on the structure and dynamics of water, many open questions remain, in particular concerning the spatial extent of this effect (i.e., the number of water molecules affected) and the origin of ion-specific effects. A combined terahertz and femtosecond infrared spectroscopic study of water dynamics around different ions (specifically magnesium, lithium, sodium, and cesium cations, as well as sulfate, chloride, iodide, and perchlorate anions) reveals that the effect of ions and counterions on water can be strongly interdependent and nonadditive, and in certain cases extends well beyond the first solvation shell of water molecules directly surrounding the ion.

View Full Text