Catalytic ship-in-a-bottle assembly within hollow porous nanocapusles

Ehterami, Nasim; Dergunov, Sergey A.; Ussipbekova, Yenlik; Birman, Vladimir B.; Pinkhassik, Eugene

doi:10.1039/c3nj01449e

Cited by 10 publications

(14 citation statements)

References 25 publications

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“…and enrich the functions (e.g., magnetic separation, stimuli‐responsive, tandem catalysis, etc. ), several functionalization synthetic methods have been applied to upgrade simplex hollow building blocks to complex hierarchical structures: ship‐in‐a‐bottle methods are applied for the synthesis of encapsulated hollow structures to disperse and stabilize the catalytic sites; multistep template methods are used for the synthesis of multishelled hollow structures to increase the number of active sites; pyrolysis of metal–organic polymers for single atom site hollow structures maximizes the exposure of metal atoms to promote the overall activity; surface molecular modification of hybrid hollow structures at diverse spatial sites enables the catalysis of tandem reactions on the integrated multiple reaction sites …”

Section: Introductionmentioning

confidence: 99%

Functionalization of Hollow Nanomaterials for Catalytic Applications: Nanoreactor Construction

et al. 2018

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Hollow nanomaterials have attracted a broad interest in multidisciplinary research due to their unique structure and preeminent properties. Owing to the high specific surface area, well-defined active site, delimited void space, and tunable mass transfer rate, hollow nanostructures can serve as excellent catalysts, supports, and reactors for a variety of catalytic applications, including photocatalysis, electrocatalysis, heterogeneous catalysis, homogeneous catalysis, etc. Based on state-of-the-art synthetic methods and characterization techniques, researchers focus on the purposeful functionalization of hollow nanomaterials for catalytic mechanism studies and intricate catalytic reactions. Herein, an overview of current reports with respect to the catalysis of functionalized hollow nanomaterials is given, and they are classified into five types of versatile strategies with a top-down perspective, including textual and composition modification, encapsulation, multishelled construction, anchored single atomic site, and surface molecular engineering. In the detailed case studies, the design and construction of hierarchical hollow catalysts are discussed. Moreover, since hollow structure offers more than two types of spatial-delimited sites, complicated catalytic reactions are elaborated. In summary, functionalized hollow nanomaterials provide an ideal model for the rational design and development of efficient catalysts.

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Section: Introductionmentioning

confidence: 99%

Functionalization of Hollow Nanomaterials for Catalytic Applications: Nanoreactor Construction

et al. 2018

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“…The assembly of an internal unit involved catalytic trimerization of 4‐acetylphenylisocyanate. The trimerization occurred exclusively inside the nanocapsules due to the action of an entrapped proazaphosphatrane, as shown previously . We used the acetyl group of the entrapped internal unit as an anchor to connect a primary amine of the linker by the Mannich reaction.…”

Section: Figurementioning

confidence: 82%

“…The synthesis of rotaxane‐like hybrid structures is enabled by our previous studies on the encapsulation of different molecules in porous polymer nanocapsules . Molecules can be entrapped during the preparation of nanocapsules or synthesized inside the pre‐fabricated capsules by the ship‐in‐a‐bottle assembly ,…”

Section: Figurementioning

confidence: 99%

“…Molecules are retained due to steric interactions when molecules or complexes are larger than the pores in the shells of nanocapsules or due to electrostatic repulsion from the pores . In these studies, hollow nanocapsules with uniform nanopores were created by forming a cross‐linked polymer shell in the presence of pore‐forming templates in the hydrophobic interior of a bilayer of lipid or surfactants vesicles . The size and chemical environment of nanopores can be controlled by the pore‐forming templates .…”

Section: Figurementioning

confidence: 99%

“…Polymer nanocapsules were prepared by using a previously described procedure . Nanocapsules (30 mg) containing entrapped Varkade's superbase were dissolved in 10 mL of benzene.…”

Section: Figurementioning

confidence: 99%

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Rotaxane‐Like Structures Threaded through the Pores of Hollow Porous Nanocapusles

Dergunov

Ehterami

Pinkhassik

2016

Chemistry A European J

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Nanocapsules with molecules threaded through the porous shells may lead to advanced cell-mimicking functional devices. Herein, we show the feasibility of synthesizing such hybrid nanostructures by using vesicle-templated polymer nanocapsules with controlled nanopores. Ship-in-a-bottle assembly inside a nanocapsule created an internal unit. An external unit was then connected to an entrapped internal unit through pre-attached linker threaded through a nanopore in the shell of the nanocapsule. Both internal and external units are larger than the pore size and cannot cross the shell, producing a rotaxane-like structure. Successful synthesis was achieved with fairly short linkers (six and ten carbon atoms in a chain), creating an opportunity for facile synthesis of functional devices capable of cross-shell communication.

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Porous‐Carbon‐Confined Formation of Monodisperse Iron Nanoparticle Yolks toward Versatile Nanoreactors for Metal Extraction

Wang

Luo

Chen

et al. 2018

Chemistry A European J

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All-in-one architectures in which uniform nanoscale zero-valent iron nanoparticles are wrapped in hollow porous carbon shells are highly desirable for environmental applications such as wastewater treatment and for use as catalysts, but their preparation remains a significant challenge. Herein, a spatially confined strategy for the in situ preparation of uniform Fe @mC (mC=micro/mesoporous carbon) yolk-shell nanospheres, in which the iron nanoparticles are encapsulated in thin, porous carbon shells, is reported. The elaborately designed Fe @mC yolk-shell nanospheres were obtained by utilizing silica- and phenolic-resin-coated magnetite nanoparticle core-shell structures as templates by means of selective etching and in situ thermal reduction. The highly dispersed iron nanoparticles with superior reduction capability can effectively remove metal pollutants (e.g., Au , Ag , and Cu ), the carbon shell acts as protective cover and prevents aggregation of iron nanoparticles, and the void space in the capsules serves as a reactor for reduction and catalytic reactions.

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Catalytic ship-in-a-bottle assembly within hollow porous nanocapusles

Cited by 10 publications

References 25 publications

Functionalization of Hollow Nanomaterials for Catalytic Applications: Nanoreactor Construction

Functionalization of Hollow Nanomaterials for Catalytic Applications: Nanoreactor Construction

Rotaxane‐Like Structures Threaded through the Pores of Hollow Porous Nanocapusles

Porous‐Carbon‐Confined Formation of Monodisperse Iron Nanoparticle Yolks toward Versatile Nanoreactors for Metal Extraction

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