Coupling between intra- and intermolecular motions in liquid water revealed by two-dimensional terahertz-infrared-visible spectroscopy

Abstract

Liquid water molecules are in constant vibrational motion, but probing how their local behaviour influences collective dynamics remains a challenge. Here, the authors present terahertz-infrared spectroscopy to elucidate coupling of the O-H stretch vibration to collective, delocalized intermolecular modes.