Terahertz time-domain spectroscopy of ionic liquids and organic liquids

Author

Yamamoto, Kohji ; Tani, Masahiko ; Hangyo, Masanori

Author_Institution

Inst. of Laser Eng., Osaka Univ., Japan

Volume

2

fYear

2005

fDate

19-23 Sept. 2005

Firstpage

413

Abstract

We have measured the terahertz (THz) dielectric constants of ionic liquids and their relating organic liquids by the THz time-domain spectroscopy (THz-TDS). The frequency range from 3.3 cm^-1 (0.1 THz) to 140 cm^-1 (4.2 THz) has been available. The ionic liquids show broad but structured THz spectra of the dielectric constants, which can be represented by the combination of relaxation and vibrational bands. Intermolecular motions reflect the bands in the high frequency region, which show underdamped features. This indicates that the ions in the ionic liquids do not move freely but vibrate around the stable position under strong the ion-ion interaction.

Keywords

dielectric liquids; dielectric relaxation; ion-molecule collisions; permittivity; submillimetre wave spectroscopy; time-domain analysis; 0.1 to 4.2 THz; THz spectra; intermolecular motions; ion-ion interaction; ionic liquids; organic liquids; terahertz dielectric constants; terahertz time-domain spectroscopy; vibrational bands; Dielectric constant; Dielectric measurements; Electrochemical impedance spectroscopy; Frequency; Hydrogen; Liquids; Optical pulse generation; Solvents; Space vector pulse width modulation; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on

Print_ISBN

0-7803-9348-1

Type

conf

DOI

10.1109/ICIMW.2005.1572588

Filename

1572588