Connecting structurally and dynamically detected signatures of supramolecular Debye liquids

T. Büning; J. Lueg; J. Bolle; C. Sternemann; C. Gainaru; M. Tolan; R. Böhmer

doi:10.1063/1.4986866

Connecting structurally and dynamically detected signatures of supramolecular Debye liquids

T. Büning, J. Lueg, J. Bolle, C. Sternemann, C. Gainaru, M. Tolan, R. Böhmer

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

The monohydroxy alcohol 2-ethyl-1-hexanol mixed with the halogen-substituted alkyl halides 2-ethyl-1-hexyl chloride and 2-ethyl-1-hexyl bromide was studied using synchrotron-based x-ray scattering. In the diffraction patterns, an oxygen-related prepeak appears. The concentration dependence of its intensity, shape, and position indicates that the formation of the hydrogen-bonded associates of monohydroxy alcohols is largely hindered by the halogen alkane admixture. Using dielectric spectroscopy and high-resolution rheology on the same liquid mixtures, it is shown that these structural features are correlated with the relaxation mechanisms giving rise to supramolecular low-frequency dynamics.

Original language	English
Article number	234501
Journal	Journal of Chemical Physics
Volume	147
Issue number	23
DOIs	https://doi.org/10.1063/1.4986866
State	Published - Dec 21 2017
Externally published	Yes

Funding

We thank the Deutsche Forschungsgemeinschaft, Grant No. BO1301/14-1, and the cluster of excellence RESOLV (No. EXC 1069) for funding, as well as the DELTA machine group for providing synchrotron radiation and technical support. T.B., C.S., and M.T. acknowledge the financial support from BMBF (Project No. 05K13PE2 within FSP-302 and 05K16PE1) and MERCUR (No. AN-2014-0036).

Funders	Funder number
Deutsche Forschungsgemeinschaft	EXC 1069, BO1301/14-1
Bundesministerium für Bildung und Forschung	FSP-302, 05K16PE1, 05K13PE2
Bundesministerium für Bildung und Frauen
Mercator Research Center Ruhr	AN-2014-0036

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abstract = "The monohydroxy alcohol 2-ethyl-1-hexanol mixed with the halogen-substituted alkyl halides 2-ethyl-1-hexyl chloride and 2-ethyl-1-hexyl bromide was studied using synchrotron-based x-ray scattering. In the diffraction patterns, an oxygen-related prepeak appears. The concentration dependence of its intensity, shape, and position indicates that the formation of the hydrogen-bonded associates of monohydroxy alcohols is largely hindered by the halogen alkane admixture. Using dielectric spectroscopy and high-resolution rheology on the same liquid mixtures, it is shown that these structural features are correlated with the relaxation mechanisms giving rise to supramolecular low-frequency dynamics.",

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AU - Büning, T.

AU - Lueg, J.

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AU - Gainaru, C.

AU - Tolan, M.

AU - Böhmer, R.

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AB - The monohydroxy alcohol 2-ethyl-1-hexanol mixed with the halogen-substituted alkyl halides 2-ethyl-1-hexyl chloride and 2-ethyl-1-hexyl bromide was studied using synchrotron-based x-ray scattering. In the diffraction patterns, an oxygen-related prepeak appears. The concentration dependence of its intensity, shape, and position indicates that the formation of the hydrogen-bonded associates of monohydroxy alcohols is largely hindered by the halogen alkane admixture. Using dielectric spectroscopy and high-resolution rheology on the same liquid mixtures, it is shown that these structural features are correlated with the relaxation mechanisms giving rise to supramolecular low-frequency dynamics.

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Connecting structurally and dynamically detected signatures of supramolecular Debye liquids

Abstract

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