An ionic liquid-functionalized amphiphilic Janus material as a Pickering interfacial catalyst for asymmetric sulfoxidation in water

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 mater...

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Published inChemical communications (Cambridge, England) Vol. 55; no. 5; pp. 592 - 595
Main Authors Zhang, Mingjie, Tang, Zhiyang, Fu, Wenqin, Wang, Weiying, Tan, Rong, Yin, Donghong
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 10.01.2019
Subjects
Catalysis
Catalysts
Catalytic activity
Emulsions
Hydrophobicity
Ionic liquids
Ions
Silicon dioxide
Solvents
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Summary: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.
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content type line 23
ISSN:1359-7345
1364-548X
DOI:10.1039/c8cc08292h