Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 132, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3352585
Keywords
dielectric function; dielectric liquids; harmonic oscillators; hydrogen bonds; organic compounds; rotational-vibrational energy transfer; vibrational modes
Funding
- Foundation of German Economics (SDW)
- Ruhr-University Bochum Research School
- German Federal Ministry of Education and Research (BMBF) [BMBF 05KS7PC2]
- DFG [SPP 1191]
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We have measured the complex dielectric function of the protic ionic liquid ethylammonium nitrate in the frequency range between 0.15 and 1.8 THz with a terahertz time domain spectrometer. The experiments reveal a terahertz mode which can be described as a damped harmonic oscillator with a central frequency of 1.3 THz. The terahertz mode is assigned to an intermolecular vibration, presumably associated with hydrogen-bond dynamics. The data are combined with microwave data to represent the dielectric spectrum from quasistatic conditions up to 1.8 THz.
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