In a recent publication in Nature Communications, we show how the infrared spectroscopic signatures of hydrochloric acid solutions are related to proton-transfer processes between water molecules, the elementary step of the long-range Grotthus transport.
In a second work that just appeared in the Journal of Chemical Physics, the IR band shapes produced by proton-transfer events are derived using analytical models for the barrier-crossing dynamics as a proton moves from one water molecule to a neighboring one.

You can check out the articles here!
https://www.nature.com/articles/s41467-022-31700-x
https://aip.scitation.org/doi/10.1063/5.0116686