Glycerol Hydrogen-Bonding Network Dominates Structure and Collective Dynamics in a Deep Eutectic Solvent

Published

January 25, 2018

Author(s)

Antonio Faraone, Durgesh V. Wagle, Gary A. Baker, E. C. Novak, M. Ohl, D. Reuter, Peter Lunkenheimer, A. Loidl, Eugene Mamontov

Abstract

The deep eutectic solvent glyceline formed by choline chloride and glycerol in 1:2 molar ratio is much less viscous compared to glycerol, which facilitates its use in many applications where high viscosity is undesirable. Despite the large difference in viscosity, we have found that the structure network of glyceline is completely defined by its glycerol constituent, which exhibits complex microscopic dynamic behavior, as expected from highly correlated hydrogen-bonding network. There is little dynamic correlation between the glycerol and choline species. Choline ions occupy the intestitial voids in the glycerol network, with which they show little structural or dynamic correlations. Despite the known higher long-range diffusivity of hte smaller glycerol species in glyceline, in applications where the localized dynamics is essential (e.g., in microporous media) the local transport and dynamic properties must be dominated by the relatively loosely bound choline ions.

Citation

Journal of Physical Chemistry B

Volume

122

Issue

3

Pub Type

Journals

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Keywords

Glyceline, Neutron Spin Echo

Citation

Faraone, A. , , D. , , G. , , E. , Ohl, M. , Reuter, D. , Lunkenheimer, P. , Loidl, A. and Mamontov, E. (2018), Glycerol Hydrogen-Bonding Network Dominates Structure and Collective Dynamics in a Deep Eutectic Solvent, Journal of Physical Chemistry B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924399 (Accessed December 13, 2024)