Simultaneous Measurement of Speed of Sound, Thermal Diffusivity, and Bulk Viscosity of 1-Ethyl-3-methylimidazolium-Based Ionic Liquids Using Laser-Induced Gratings
Kozlov D, Kiefer J, Seeger T, Fröba AP, Leipertz A (2014)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2014
Journal
Publisher: American Chemical Society
Book Volume: 118
Pages Range: 14493-14501
DOI: 10.1021/jp510186x
Abstract
The technique of laser-induced gratings (LIGs) has been applied to the simultaneous determination of speed of sound and thermal diffusivity of four 1-ethyl-3-methylimidazolium ([EMIm])-based room temperature ionic liquids (RTILs)-[EMIm][N(CN)(2)], [EMIm][MeSO3], [EMIm][C(CN)(3)], and [EMIm][NTf2]-at ambient pressure (1 bar (0.1 MPa)) and temperature (28 degrees C (301 K)). Transient laser-induced gratings were created as a result of thermalization of a quasi-resonant excitation of highly lying combinational vibrational states of the RTIL molecules and electrostrictive compression of the liquid by radiation of a pulse-repetitive Q-switched Nd:YAG pump laser (1064 nm). The LIGs temporal evolution was recorded using Bragg diffraction of the radiation from a continuous-wave probe laser (532 nm). By fitting the temporal profiles of the LIG signals, the speed of sound and thermal diffusivity were determined, and the isentropic compressibility and thermal conductivity were calculated. Independently, the special experimental arrangement allowed the measurement of the damping of the laser-excited acoustic waves and the derivation of the RTIL bulk viscosity for the first time.
Authors with CRIS profile
Thomas Seeger
Lehrstuhl für Technische Thermodynamik
Andreas Paul Fröba
Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP)
Alfred Leipertz
Technische Fakultät
Additional Organisation(s)
Involved external institutions
Russian Federation (RU)How to cite
APA:
Kozlov, D., Kiefer, J., Seeger, T., Fröba, A.P., & Leipertz, A. (2014). Simultaneous Measurement of Speed of Sound, Thermal Diffusivity, and Bulk Viscosity of 1-Ethyl-3-methylimidazolium-Based Ionic Liquids Using Laser-Induced Gratings. Journal of Physical Chemistry B, 118, 14493-14501. https://dx.doi.org/10.1021/jp510186x
MLA:
Kozlov, Dimitrii, et al. "Simultaneous Measurement of Speed of Sound, Thermal Diffusivity, and Bulk Viscosity of 1-Ethyl-3-methylimidazolium-Based Ionic Liquids Using Laser-Induced Gratings." Journal of Physical Chemistry B 118 (2014): 14493-14501.
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