Static phase transfer catalysis for Williamson reactions: Pickering interfacial catalysis 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Catalysis science & technology
年/卷/期
2019 / 9 / 13
页码
3445-3453
ISSN号
2044-4753
作者单位
Zhejiang Sci Tech Univ, Minist Educ, Engn Res Ctr Ecodyeing & Finishing Text, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Minist Educ, Engn Res Ctr Ecodyeing & Finishing Text, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Minist Educ, Engn Res Ctr Ecodyeing & Finishing Text, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Minist Educ, Engn Res Ctr Ecodyeing & Finishing Text, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Minist Educ, Engn Res Ctr Ecodyeing & Finishing Text, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Minist Educ, Engn Res Ctr Ecodyeing & Finishing Text, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Minist Educ, Engn Res Ctr Ecodyeing & Finishing Text, Hangzhou 310018, Zhejiang, Peoples R China;Zhejiang Sci Tech Univ, Minist Educ, Engn Res Ctr Ecodyeing & Finishing Text, Hangzhou 310018, Zhejiang, Peoples R China;
作者
Zhao, Qiangqiang;Zhao, Xiao;Peng, Hui;Liu, Yang;Yang, Lihui;Sun, Jie;Yang, Lei;Shen, Yifeng;
摘要
Pickering interfacial catalysis (PIC) systems are regarded as an innovative platform for the design of efficient static biphasic catalytic reactions. In this study, a static PIC system with high catalytic activity was constructed for a phase transfer catalysis system for the Williamson reaction. Silica particles modified with a cation surfactant, DTAB (dodecyl trimethylammonium bromide), were used as the Pickering emulsifier, and a stable Pickering emulsion was constructed. The droplet size of the emulsion was 21 mu m, and no changes in the size and distribution were observed upon standing the emulsion for 24 h. Because of the competitive adsorption of DTA(+) between the silica particles and phenolate anion, the second layer of DTA(+) adsorbed on the modified particles is in the form of ion-pairs with phenolate anion, and the ion-pairs can also enter the first layer. These modified silica particles are arranged at the interface of the aqueous phase and the oil phase, and the adsorbed DTA(+) can transfer phenolate anion to catalyze the PTC reaction. Tetrabutylammonium bromide (TBAB) can be used as a cocatalyst to enhance the catalytic reaction. The conversion rate of benzyl bromide derivatives reached more than 90% within the PIC system, demonstrating its potential applications in industrial synthesis.
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
若您需要申请原文,请登录。

最新评论

暂无评论。

登录后可以发表评论

意见反馈
返回顶部