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Micrometer‐Scale Mixing with Pickering Emulsions: Biphasic Reactions without Stirring
Author(s) -
Zhang Wenjuan,
Fu Luman,
Yang Hengquan
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201301001
Subject(s) - pickering emulsion , catalysis , chemical engineering , mixing (physics) , micrometer , chemistry , emulsion , materials science , nanotechnology , allylic rearrangement , wetting , organic chemistry , physics , optics , quantum mechanics , engineering
A general strategy that avoids stirring for organic/aqueous reactions involving solid catalysts is reported. The strategy involves converting a conventional biphasic system into a Pickering emulsion phase with micrometer‐scale droplets ensuring good mixing. In test reactions, nitrotoluene reduction and epoxidation of allylic alcohols, the reaction efficiency is comparable to conventional stirrer‐driven biphasic catalysis reaction systems. Short diffusion distances, arising from the compartmentalization of densely packed droplets, play an important role in boosting the reaction efficiency.