Hydrogen-bond equilibria and lifetimes in a monohydroxy alcohol

C. Gainaru; S. Kastner; F. Mayr; P. Lunkenheimer; S. Schildmann; H. J. Weber; W. Hiller; A. Loidl; R. Böhmer

doi:10.1103/PhysRevLett.107.118304

Hydrogen-bond equilibria and lifetimes in a monohydroxy alcohol

C. Gainaru, S. Kastner, F. Mayr, P. Lunkenheimer, S. Schildmann, H. J. Weber, W. Hiller, A. Loidl, R. Böhmer

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

80 Scopus citations

Abstract

Dielectric loss spectra covering 13 decades in frequency were collected for 2-ethyl-1-hexanol, a monohydroxy alcohol that exhibits a prominent Debye-like relaxation, typical for several classes of hydrogen-bonded liquids. The thermal variation of the dielectric absorption amplitude agrees well with that of the hydrogen-bond equilibrium population, experimentally mapped out using near infrared (NIR) and nuclear magnetic resonance (NMR) measurements. Despite this agreement, temperature-jump NIR spectroscopy reveals that the hydrogen-bond switching rate does not define the frequency position of the prominent absorption peak. This contrasts with widespread notions and models based thereon, but is consistent with a recent approach.

Original language	English
Article number	118304
Journal	Physical Review Letters
Volume	107
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.107.118304
State	Published - Sep 9 2011
Externally published	Yes

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10.1103/PhysRevLett.107.118304

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abstract = "Dielectric loss spectra covering 13 decades in frequency were collected for 2-ethyl-1-hexanol, a monohydroxy alcohol that exhibits a prominent Debye-like relaxation, typical for several classes of hydrogen-bonded liquids. The thermal variation of the dielectric absorption amplitude agrees well with that of the hydrogen-bond equilibrium population, experimentally mapped out using near infrared (NIR) and nuclear magnetic resonance (NMR) measurements. Despite this agreement, temperature-jump NIR spectroscopy reveals that the hydrogen-bond switching rate does not define the frequency position of the prominent absorption peak. This contrasts with widespread notions and models based thereon, but is consistent with a recent approach.",

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AU - Gainaru, C.

AU - Kastner, S.

AU - Mayr, F.

AU - Lunkenheimer, P.

AU - Schildmann, S.

AU - Weber, H. J.

AU - Hiller, W.

AU - Loidl, A.

AU - Böhmer, R.

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AB - Dielectric loss spectra covering 13 decades in frequency were collected for 2-ethyl-1-hexanol, a monohydroxy alcohol that exhibits a prominent Debye-like relaxation, typical for several classes of hydrogen-bonded liquids. The thermal variation of the dielectric absorption amplitude agrees well with that of the hydrogen-bond equilibrium population, experimentally mapped out using near infrared (NIR) and nuclear magnetic resonance (NMR) measurements. Despite this agreement, temperature-jump NIR spectroscopy reveals that the hydrogen-bond switching rate does not define the frequency position of the prominent absorption peak. This contrasts with widespread notions and models based thereon, but is consistent with a recent approach.

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Hydrogen-bond equilibria and lifetimes in a monohydroxy alcohol

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