The Extreme Low‐Frequency Raman Spectrum of Liquid Water

Not merely sloshing around: The chemical and physical properties of water are very important. In contrast to its simplistic chemical formula, water possesses a complex dynamic behaviour (see picture). The bend, torsion, symmetric and asymmetric stretch modes of liquid water, close to the wavelength of the laser line have been predicted. Here, the low-frequency Raman spectrum of liquid water is presented confirming the presence of all four modes in the restricted translational region (35–300 cm−1).