The effects of organic compound doping in single-bubble sonoluminescence

Ashokkumar, Muthupandian; Grieser, Franz; McNamara, William B.; Suslick, Kenneth S.; Matula, Thomas J.; Frensley, C. Allen; Crum, Lawrence A.

doi:10.1121/1.422130

Cited by 3 publications

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“…Also, an increase in the alkyl chain length of the alcohol results in a more pronounced effect on the reduction in the sonoluminescence signal. These trends have also been observed in single-bubble sonoluminescence experiments indicating they are not specific to multibubble systems …”

Section: Resultssupporting

confidence: 55%

“…In our previous work on sonochemistry , and sonoluminescence , processes in aqueous solutions, we have been concerned with the effects that surface-active solutes have on the two ultrasound-generated phenomena. It was found that the additives can dramatically affect the extent of certain sonochemical reactions as well as enhance or quench the sonoluminescence.…”

Section: Introductionmentioning

confidence: 99%

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Sonochemistry and Sonoluminescence in Aqueous AuCl₄^- Solutions in the Presence of Surface-Active Solutes

et al. 1999

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The 515 kHz ultrasound-initiated reduction of AuCl 4to Au(0) was examined as a function of the concentration of various surface-active solutes. The amount of AuCl 4reduced in the presence of ethanol, propan-1-ol, and butan-1-ol was found to be dependent on the surface excess of the alcohol at the gas/solution interface, i.e., the relative concentration of the alcohol at the gas/solution interface compared to the bulk solution concentration. The efficiency of reduction of AuCl 4in the presence of the surfactants sodium dodecyl sulfate or octaethylene glycol monodecyl ether was found to be related to the monomer concentration of the surfactant in solution. The light emitted (sonoluminescence) during ultrasonic irradiation of the aqueous solutions was also monitored and compared with the trends observed in the sonochemical experiments. The sonoluminescence was observed to be significantly reduced in the presence of alcohol, and the effect was correlated with the surface excess of the alcohols at the gas/solution interface. In contrast, the effect of the surfactants on the sonoluminescence was highly dependent on concentration and headgroup type of the surfactant.

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Section: Resultssupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Sonochemistry and Sonoluminescence in Aqueous AuCl₄^- Solutions in the Presence of Surface-Active Solutes

et al. 1999

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“…Mechanism i can be discounted because SL quenching, using the same additives as in the present study, has also been observed in single bubble experiments . Furthermore, when the solute adsorbed at the bubble/water interface is charged, no quenching takes place.…”

Section: Discussionsupporting

confidence: 59%

The Effect of pH on Multibubble Sonoluminescence from Aqueous Solutions Containing Simple Organic Weak Acids and Bases

1999

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The sonoluminescence (SL) intensity from aqueous solutions containing either alkyl acids or alkylamines is shown to be dependent on both the hydrocarbon chain length of the solute and the pH of the solution. Alkylamines quench the SL only at pH values above about 9 whereas alkyl acids quench only below about pH 7. In the pH ranges where SL quenching occurs, the longer the alkyl chain length the greater the effect. The results have been interpreted in terms of the neutral forms of the solutes adsorbing at the bubble/ solution interface and then evaporating into the bubble core during its growth and compression oscillations, leading to the quenching of the SL. Possible processes that may be responsible for the quenching are discussed.

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“…SL, both SBSL and MBSL, is also known to be affected by the presence of solutes in the liquid. − Small amounts of water-soluble organic solutes, such as aliphatic alcohols, amines, and carboxylic acids, induce quite strong SL quenching. The effect has been shown to be linked to the amount of solute adsorbed to the bubble/solution interface, and with the additional requirement that the solute be volatile .…”

Section: Introductionmentioning

confidence: 99%

Sonoluminescence Quenching in Aqueous Solutions Containing Weak Organic Acids and Bases and Its Relevance to Sonochemistry

2000

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Multibubble sonoluminescence from water was found to be quenched by the addition of low levels of unsubstituted or 2-chloro-substituted aliphatic carboxylic acids and the aromatic solutes, phenol and aniline. In all cases, the sonoluminescence intensity could be restored to the level obtained in pure water by adjusting the solution pH to a point where the solutes were completely in their ionized form. A comparison of the sonochemical decomposition of phenol at pH levels above and below its pK a revealed that only when the solute was in its neutral form was there significant decomposition. It is shown that both the sonochemical decomposition of phenol and the sonoluminescence quenching by all solutes studied can be directly correlated with the amount of solute adsorbed at the bubble/solution interface. The relationship between sonochemical activity and sonoluminescence quenching by water-soluble organic solutes is discussed.

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The effects of organic compound doping in single-bubble sonoluminescence

Cited by 3 publications

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Sonochemistry and Sonoluminescence in Aqueous AuCl₄^- Solutions in the Presence of Surface-Active Solutes

Sonochemistry and Sonoluminescence in Aqueous AuCl₄^- Solutions in the Presence of Surface-Active Solutes

The Effect of pH on Multibubble Sonoluminescence from Aqueous Solutions Containing Simple Organic Weak Acids and Bases

Sonoluminescence Quenching in Aqueous Solutions Containing Weak Organic Acids and Bases and Its Relevance to Sonochemistry

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The effects of organic compound doping in single-bubble sonoluminescence

Cited by 3 publications

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Sonochemistry and Sonoluminescence in Aqueous AuCl4- Solutions in the Presence of Surface-Active Solutes

Sonochemistry and Sonoluminescence in Aqueous AuCl4- Solutions in the Presence of Surface-Active Solutes

The Effect of pH on Multibubble Sonoluminescence from Aqueous Solutions Containing Simple Organic Weak Acids and Bases

Sonoluminescence Quenching in Aqueous Solutions Containing Weak Organic Acids and Bases and Its Relevance to Sonochemistry

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Sonochemistry and Sonoluminescence in Aqueous AuCl₄^- Solutions in the Presence of Surface-Active Solutes

Sonochemistry and Sonoluminescence in Aqueous AuCl₄^- Solutions in the Presence of Surface-Active Solutes