Sonoluminescence quenching and cavitation bubble temperature measurements in an ionic liquid

Parag M Kanthale; Adam Brotchie; Franz Grieser; Muthupandian Ashokkumar

doi:10.1016/j.ultsonch.2012.05.011

Sonoluminescence quenching and cavitation bubble temperature measurements in an ionic liquid

Ultrason Sonochem. 2013 Jan;20(1):47-51. doi: 10.1016/j.ultsonch.2012.05.011. Epub 2012 Jun 1.

Authors

Parag M Kanthale¹, Adam Brotchie, Franz Grieser, Muthupandian Ashokkumar

Affiliation

¹ Particulate Fluids Processing Centre, School of Chemistry, University of Melbourne, Melbourne, Victoria 3010, Australia.

PMID: 22717325
DOI: 10.1016/j.ultsonch.2012.05.011

Abstract

A comparison between the temperatures within imploding acoustic cavitation bubbles and the extent of sonoluminescence (SL) quenching by C(1)-C(5) aliphatic alcohols in 1-ethyl-3-methylimidazolium ethylsulfate ([EMIM][EtSO(4)], a well known imidazolium based room temperature ionic liquid (RTIL)), has been made at an ultrasound frequency of 213 kHz. The temperatures obtained ranged from 3500 ± 200K, in neat [EMIM][EtSO(4)], to about 3200 ± 200K in RTIL-alcohol containing solutions. It was also found that the SL intensity decreased with increasing concentration (up to 1M) of the alcohols to a greater extent compared with the relative changes to the bubble temperatures. Both the extent of the reduction in the bubble temperatures and the SL quenching were much smaller than those obtained in comparable aqueous solutions containing aliphatic alcohols. Possible reasons for the differences in the observed trends between water/alcohol and [EMIM][EtSO(4)]/alcohol systems under sonication at 213 kHz are discussed.