Energy transfer within the hydrogen bonding network of water following resonant terahertz excitation

Elgabarty H, Kampfrath T, Bonthuis DJ, Balos V, Kaliannan NK, Loche P, Netz RR, Wolf M, Kühne TD, Sajadi M (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Science Advances American Association for the Advancement of Science

Book Volume: 6

Article Number: aay7074

Journal Issue: 17

DOI: 10.1126/sciadv.aay7074

Abstract

Energy dissipation in water is very fast and more efficient than in many other liquids. This behavior is commonly attributed to the intermolecular interactions associated with hydrogen bonding. Here, we investigate the dynamic energy flow in the hydrogen bond network of liquid water by a pump-probe experiment. We resonantly excite intermolecular degrees of freedom with ultrashort single-cycle terahertz pulses and monitor its Raman response. By using ultrathin sample cell windows, a background-free bipolar signal whose tail relaxes monoexponentially is obtained. The relaxation is attributed to the molecular translational motions, using complementary experiments, force field, and ab initio molecular dynamics simulations. They reveal an initial coupling of the terahertz electric field to the molecular rotational degrees of freedom whose energy is rapidly transferred, within the excitation pulse duration, to the restricted translational motion of neighboring molecules. This rapid energy transfer may be rationalized by the strong anharmonicity of the intermolecular interactions.

Involved external institutions

Fritz-Haber-Institut der Max-Planck-Gesellschaft (FHI) DE Germany (DE) Universität Paderborn DE Germany (DE) Freie Universität Berlin DE Germany (DE)

How to cite

APA:

Elgabarty, H., Kampfrath, T., Bonthuis, D.J., Balos, V., Kaliannan, N.K., Loche, P.,... Sajadi, M. (2020). Energy transfer within the hydrogen bonding network of water following resonant terahertz excitation. Science Advances, 6(17). https://doi.org/10.1126/sciadv.aay7074

MLA:

Elgabarty, Hossam, et al. "Energy transfer within the hydrogen bonding network of water following resonant terahertz excitation." Science Advances 6.17 (2020).

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