Speed of Sound and Ultrasound Absorption in Ionic Liquids.
A complete review of the literature data on the speed of sound and ultrasound absorption in pure ionic liquids (ILs) is presented. Apart of the analysis of data published to date, the significance of the speed of sound in ILs is regarded. An analysis of experimental methods described in the literature to determine the speed of sound in ILs as a function of temperature and pressure is reported, and the relevance of ultrasound absorption in acoustic investigations is discussed. Careful attention was paid to highlight possible artifacts, and side phenomena related to the absorption and relaxation present in such measurements. Then, an overview of existing data is depicted to describe the temperature and pressure dependences on the speed of sound in ILs, as well as the impact of impurities in ILs on this property. A relation between ions structure and speeds of sound is presented by highlighting existing correlation and evaluative methods described in the literature. Importantly, a critical analysis of speeds of sound in ILs vs those in classical molecular solvents is presented to compare these two classes of compounds. The last part presents the importance of acoustic investigations for chemical engineering design and possible industrial applications of ILs.
University of Silesia , Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland.
Marzena
M
Dzida
University of Silesia , Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland.
Edward
E
Zorębski
University of Silesia , Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland.
Michał
M
Zorębski
University of Silesia , Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland.
Monika
M
Żarska
University of Silesia , Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland.
Monika
M
Geppert-Rybczyńska
University of Silesia , Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland.
Mirosław
M
Chorążewski
School of Chemistry and Chemical Engineering/QUILL, Queen's University Belfast , Belfast BT9 5AG, United Kingdom.|Université François Rabelais , Laboratoire PCM2E, Parc de Grandmont, 37200 Tours, France.
Johan
J
Jacquemin
University of Chemistry and Technology , Department of Physical Chemistry, Technická 5, 166 28 Prague, Czech Republic.
Ivan
I
Cibulka