Sonoluminescence quenching and cavitation bubble temperature measurements in an ionic liquid

详细信息    查看全文

• 作者：Parag M. Kanthale ; Adam Brotchie ; Franz Grieser ; Muthup ; ian Ashokkumar
• 关键词：Sonoluminescence in ionic liquids ; Cavitation bubble temperatures ; Sonoluminescence quenching ; Sonochemistry
• 刊名：Ultrasonics Sonochemistry
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：20
• 期：1
• 页码：47-51
• 全文大小：336 K

文摘

A comparison between the temperatures within imploding acoustic cavitation bubbles and the extent of sonoluminescence (SL) quenching by C₁-C₅ aliphatic alcohols in 1-ethyl-3-methylimidazolium ethylsulfate ([EMIM][EtSO₄], 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 ¡À 200 K, in neat [EMIM][EtSO₄], to about 3200 ¡À 200 K in RTIL-alcohol containing solutions. It was also found that the SL intensity decreased with increasing concentration (up to 1 M) 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][EtSO₄]/alcohol systems under sonication at 213 kHz are discussed.