Hannover 2016 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 8: Experimental Techniques

MO 8.7: Vortrag

Dienstag, 1. März 2016, 12:30–12:45, f142

The Structure of Water under Extreme Conditions — •Hendrik Vondracek, Lukas Knake, and Martina Havenith — Ruhr-Universität Bochum, LS Physikalische Chemie II, Bochum, Deutschland.

Studies of water under extreme conditions (high and low temperatures, extreme pressures) are of particular scientific interest. Understanding the properties of water under extreme conditions is not only a fundamental prerequisite for a better understanding of geological and biological processes and the exploitation of various technical applications, but is also widely believed to be fundamental for a deeper understanding of the structure of water under ambient conditions.¹ Under high pressures and temperatures to the supercritical regime, the structure of water and the hydrogen bond network show peculiar features, e.g. clustering.²

THz spectroscopy is an ideal tool to study the structural properties of water as it allows for a direct study of the intermolecular hydrogen-bond network. The principle of this spectroscopic technique and specific experimental challenges will be explained. Furthermore, first results of spectroscopic measurements of water under high pressure conditions will be presented.

[1] A. Nilsson, L.G.M. Pettersson - Perspective on the structure of liquid water - Chem. Phys., 389,1-34 (2011). [2] Q. Sun, Q. Wang and D. Ding - Hydrogen Bonded Networks in Supercritical Water - J. Phys. Chem. B, 118, 11253-11258 (2014).