Mechanism of sonochemical excitation in the reactions of lead tetraacetate with some organic substrates

被引：11

作者：

Ando, T ^{[1
]}

Fujita, M ^{[1
]}

Kimura, T ^{[1
]}

Leveque, JM ^{[1
]}

Luche, JL ^{[1
]}

Sohmiya, H ^{[1
]}

机构：

[1] UNIV TOULOUSE 3,URA 477 CNRS,F-31062 TOULOUSE,FRANCE

来源：

ULTRASONICS SONOCHEMISTRY | 1996年 / 3卷 / 03期

关键词：

lead tetraacetate; styrene; 2-octanol; sonochemical switching; radical initiation reaction; vapor pressure; boiling point; cavity;

D O I：

10.1016/S1350-4177(96)00030-2

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Strikingly contrasting positive and negative sonochemical effects were observed in the reactions of lead tetraacetate with styrene and 2-octanol, respectively. The decomposition of lead tetraacetate itself in the absence of a substrate is not accelerated by ultrasound. These results are consistent with the idea that the radical chain reaction of lead tetraacetate and styrene involves the bimolecular initiation step of the two species; under ultrasonic irradiation, styrene is excited in the gas phase of the cavity. The efficiency of the sonochemical excitation must be decisively different between the gas phase and the liquid shell of the cavity. The importance of the boiling point of a substrate involved in the radical initiation step is proposed as a hypothetical guideline in homogeneous sonochemistry.

引用

页码：S223 / S227

页数：5

共 11 条

[1] SONOCHEMICAL SWITCHING OF REACTION PATHWAYS IN SOLID LIQUID 2-PHASE REACTIONS [J].