Chemistry

Water’s lopsided structure makes protons hop between molecules

AI Insight

An international research team led by Heidelberg University has conducted the most detailed quantum simulations to date of proton movement through water. The simulations tracked how a single proton behaves among six water molecules, revealing that protons do not drift through water as individual particles but instead "hop" from one water molecule to the next. The research demonstrates that water's local asymmetry is the key factor governing this hopping mechanism.


Understanding proton transport through water is fundamental to many biological and chemical processes, including cellular energy production, acid-base chemistry, and fuel cell technology. These detailed quantum simulations provide unprecedented insights that could help improve technologies relying on proton transfer mechanisms.


Complex simulations—the most intricate of their kind to date—carried out by an international research team led by scientists at Heidelberg University’s Institute for Physical Chemistry, have revealed how water governs the way protons move through it. Using their modeling, researchers from Cambridge (U.K.), Bochum, Dijon (France) and Heidelberg were able to trace, in full quantum detail, the movements of a proton shared among six water molecules. At its core, the work addresses how a proton moves through water: not as a single particle drifting along, but by “hopping” from one molecule to the next.

Source: Water's local asymmetry drives proton hopping between molecules, simulations reveal