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Versatile Eco‐friendly Pickering Emulsions Based on Substrate/Native Cyclodextrin Complexes: A Winning Approach for Solvent‐Free Oxidations
Author(s) -
Leclercq Loïc,
Company Roberto,
Mühlbauer Andrea,
Mouret Adrien,
Aubry JeanMarie,
NardelloRataj Véronique
Publication year - 2013
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.201300081
Subject(s) - catalysis , environmentally friendly , hydrogen peroxide , cyclodextrin , chemistry , substrate (aquarium) , pickering emulsion , solvent , green chemistry , chemical engineering , organic chemistry , reaction mechanism , emulsion , ecology , oceanography , engineering , biology , geology
Solvent‐less Pickering emulsions were developed and applied to catalytic oxidation. These systems are stabilized by inclusion complexes between cyclodextrins and substrates, forming a 3D network among the dispersed phase. In the presence of hydrogen peroxide as a green oxidant and [Na] 3 [PW 12 O 40 ] as a catalyst, they provide particularly efficient reaction media for the oxidation of olefins, organosulfurs, and alcohols. The reactions proceed at competitive rates (up to 400 h −1 ) with straightforward separation of the phases by centrifugation or heating. Moreover, these new eco‐friendly systems work at a preparative scale (up to 2.5 M ) and are recycled without loss of activity.