THz reflection spectroscopy of liquid water

L. Thrane; R. H. Jacobsen; Peter Uhd Jepsen; S. R. Keiding

doi:10.1016/0009-2614(95)00543-D

THz reflection spectroscopy of liquid water

L. Thrane, R. H. Jacobsen, Peter Uhd Jepsen, S. R. Keiding

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We report an investigation of the temperature-dependent far-infrared spectrum of liquid water. We have employed a new experimental technique based on ultrashort electromagnetic pulses (THz pulses). This technique allows for fast and reliable data of both index of refraction and absorption coefficient for highly absorbing liquids. The temperature dependence reveals an enthalpy of activation corresponding to 2.5 kcal/mol in agreement with recent Raman experiments, but lower than the enthalpy observed in dielectric relaxation experiments. This demonstrates that part of the orientational relaxation in liquid water takes place without breaking of hydrogen bonds with bonding energy of 5 kcal/mol, as suggested in recent theoretical model.

Original language	English
Journal	Chemical Physics Letters
Volume	240
Issue number	4
Pages (from-to)	330-333
Number of pages	4
ISSN	0009-2614
DOIs	https://doi.org/10.1016/0009-2614(95)00543-D
Publication status	Published - 30 Jun 1995
Externally published	Yes

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title = "THz reflection spectroscopy of liquid water",

abstract = "We report an investigation of the temperature-dependent far-infrared spectrum of liquid water. We have employed a new experimental technique based on ultrashort electromagnetic pulses (THz pulses). This technique allows for fast and reliable data of both index of refraction and absorption coefficient for highly absorbing liquids. The temperature dependence reveals an enthalpy of activation corresponding to 2.5 kcal/mol in agreement with recent Raman experiments, but lower than the enthalpy observed in dielectric relaxation experiments. This demonstrates that part of the orientational relaxation in liquid water takes place without breaking of hydrogen bonds with bonding energy of 5 kcal/mol, as suggested in recent theoretical model. ",

author = "L. Thrane and Jacobsen, {R. H.} and Jepsen, {Peter Uhd} and Keiding, {S. R.}",

year = "1995",

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doi = "10.1016/0009-2614(95)00543-D",

language = "English",

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journal = "Chemical Physics Letters",

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T1 - THz reflection spectroscopy of liquid water

AU - Thrane, L.

AU - Jacobsen, R. H.

AU - Jepsen, Peter Uhd

AU - Keiding, S. R.

PY - 1995/6/30

Y1 - 1995/6/30

N2 - We report an investigation of the temperature-dependent far-infrared spectrum of liquid water. We have employed a new experimental technique based on ultrashort electromagnetic pulses (THz pulses). This technique allows for fast and reliable data of both index of refraction and absorption coefficient for highly absorbing liquids. The temperature dependence reveals an enthalpy of activation corresponding to 2.5 kcal/mol in agreement with recent Raman experiments, but lower than the enthalpy observed in dielectric relaxation experiments. This demonstrates that part of the orientational relaxation in liquid water takes place without breaking of hydrogen bonds with bonding energy of 5 kcal/mol, as suggested in recent theoretical model.

AB - We report an investigation of the temperature-dependent far-infrared spectrum of liquid water. We have employed a new experimental technique based on ultrashort electromagnetic pulses (THz pulses). This technique allows for fast and reliable data of both index of refraction and absorption coefficient for highly absorbing liquids. The temperature dependence reveals an enthalpy of activation corresponding to 2.5 kcal/mol in agreement with recent Raman experiments, but lower than the enthalpy observed in dielectric relaxation experiments. This demonstrates that part of the orientational relaxation in liquid water takes place without breaking of hydrogen bonds with bonding energy of 5 kcal/mol, as suggested in recent theoretical model.

U2 - 10.1016/0009-2614(95)00543-D

DO - 10.1016/0009-2614(95)00543-D

M3 - Journal article

VL - 240

SP - 330

EP - 333

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 4

ER -