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An ionic liquid-functionalized amphiphilic Janus material as a Pickering interfacial catalyst for asymmetric sulfoxidation in water
- Zhang, Mingjie, Tang, Zhiyang, Fu, Wenqin, Wang, Weiying, Tan, Rong, Yin, Donghong
- Chemical communications 2019 v.55 no.5 pp. 592-595
- catalysts, centrifugation, chemical reactions, emulsions, hydrophilicity, hydrophobicity, ionic liquids, silica
- Ionic liquid-functionalized amphiphilic Janus chiral salen Tiᴵⱽ catalysts were prepared by partial hydrophobic modification of silica with a chiral salen Tiᴵⱽ complex through an imidazolium ionic liquid (IL) linker. By optimizing their hydrophobic/hydrophilic balance, the IL-functionalized JNP materials exhibited excellent interfacial activity, significantly accelerating asymmetric sulfoxidation in water through the formation of stable Pickering emulsions. Moreover, catalyst recovery was readily achieved using centrifugation.