Grenzflächenkatalyse in Pickering‐Zweiphasensystemen: vom Emulsionsdesign zu grünen Reaktionen

Pera‐Titus, Marc; Leclercq, Loı̈c; Clacens, Jean‐Marc; Campo, Floryan De; Nardello‐Rataj, Véronique

doi:10.1002/ange.201402069

Cited by 66 publications

(20 citation statements)

References 143 publications

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“…To address this limitation, Pickering interfacial catalysis (PIC) has been developed . PIC is typically enabled by the use of catalytically active micro‐/nanoparticles to stabilize emulsions, that is, Pickering emulsions (PEs), for interfacial reactions.…”

Section: Methodsmentioning

confidence: 99%

Enzyme–Polymer Conjugates as Robust Pickering Interfacial Biocatalysts for Efficient Biotransformations and One‐Pot Cascade Reactions

et al. 2018

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Despite the rapid development of Pickering interfacial catalysis (PIC) at liquid-liquid interfaces with chemocatalysts, the use of unstable biocatalysts at emulsion interfaces remains a technical challenge. Herein, we present a Pickering interfacial biocatalysis (PIB) platform based on robust and recyclable enzyme-polymer conjugates that act as both catalytic sites and stabilizers at the interface of Pickering emulsions. The conjugates were prepared by growing poly(N-isopropylacrylamide) on a fragile enzyme, benzaldehyde lyase, under physiological conditions. The mild in situ conjugation process preserved the enzyme structure, and the conjugates were used to emulsify a water-organic two-phase system into a stable Pickering emulsion, leading to a significantly larger interfacial area and a 270-fold improvement in catalytic performance as compared to the unemulsified two-phase system. The PIB system could be reused multiple times. Conjugates of other enzymes were also fabricated and applied for cascade reactions.

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Section: Methodsmentioning

confidence: 99%

Enzyme–Polymer Conjugates as Robust Pickering Interfacial Biocatalysts for Efficient Biotransformations and One‐Pot Cascade Reactions

et al. 2018

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“…In this background, our group has recently reported catalytic Pickering emulsions based on CD NPs for the oxidation of alkenes, organosulfurs, and alcohols using [Na] 3 [PW 12 O 40 ] . These reaction media were classified as Pickering assisted catalysis (PAC), as the catalyst was supposed to lie in the aqueous phase contrary to the Pickering catalytic systems based on self‐assembled POM catalytic NPs, which allow a “Pickering interfacial catalysis” (PIC) . However, in similar conditions, the PAC system exhibits a greater efficacy than the PIC one (e.g., we reported TOF 0 of 236 and 35 h −1 for the epoxidation of cyclohexene with PAC and PIC systems, respectively), which, in addition, requires an acidic co‐catalyst (i.e., H 2 PO 4 − ) .…”

Section: Figurementioning

confidence: 99%

Hybrid Core–Shell Nanoparticles by “Plug and Play” Self‐Assembly

Pacaud

Leclercq

Dechézelles

et al. 2018

Chemistry A European J

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Supramolecular hybrid functional nanoparticles (NPs) can be obtained via the colloidal tectonics approach provided that multiple interactive molecular tectons are used. Herein, the programmable synthesis of novel hybrid core–shell nanoparticles via the following sequential steps is reported: (i) complexation of 1‐decanol by the β‐cyclodextrin (β‐CD), (ii) spontaneous self‐assembly into CD NPs, (iii) adsorption of polyoxometalate anions, PW12O403−, on the polar neutral interface of the CD NPs. Such an approach paves the way for the design of novel and original materials and systems.

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“…For catalyst recovery or recycling, however, no all-round solution has been reported yet [2]. For catalyst recovery or recycling, however, no all-round solution has been reported yet [2].…”

Section: Introductionmentioning

confidence: 99%

Tuning Pickering Emulsions for Optimal Reaction and Filtration Conditions

Skale

Stehl

Hohl

et al. 2016

Chemie Ingenieur Technik

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The use of Pickering emulsions has recently received increased attention in catalyzed multiphase reactions. Here, the ultrafiltration of Pickering emulsions is studied for product separation and to retain the catalyst in the reactor. To find the optimum between a high specific surface area for high reaction rates and a suited drop size distribution for high permeate fluxes, the preparation method of Pickering emulsion was investigated. It was found that the stability of the emulsion during filtration does not only depend on the solid particle content, but also on the drop size distribution.

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Grenzflächenkatalyse in Pickering‐Zweiphasensystemen: vom Emulsionsdesign zu grünen Reaktionen

Cited by 66 publications

References 143 publications

Enzyme–Polymer Conjugates as Robust Pickering Interfacial Biocatalysts for Efficient Biotransformations and One‐Pot Cascade Reactions

Enzyme–Polymer Conjugates as Robust Pickering Interfacial Biocatalysts for Efficient Biotransformations and One‐Pot Cascade Reactions

Hybrid Core–Shell Nanoparticles by “Plug and Play” Self‐Assembly

Tuning Pickering Emulsions for Optimal Reaction and Filtration Conditions

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