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

Abstract

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.

Improvement of the Hydrolytic Stability of the Keggin Molybdo- and Tungsto-Phosphate Anions by Cyclodextrins

“…The titration of 4 mM β-CD solution by {PMo12} is shown in Figure 3, and compares well with that obtained with {PW12}, shown in Figure S2, in SI. 26 The six types of protons Monitoring hydrolytic stability by 31 P NMR. The stability of PW12O40 3in pure water and in presence of two eq.…”

“…The supramolecular interactions between Keggin POMs and CDs in solution can be studied and followed, primarily by nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry. 16,22,25,26 However, these studies have rarely been conducted in POM stabilization context and no systematic pH study has been reported so far. The scope of this report will then focus on the impact of this crucial parameter, namely pH, for the POMs chemistry, hitherto ignored in previous studies about POM-CD systems.…”

“…POMs have shown a remarkable ability to interact with organic and hybrid moieties to form supramolecular assemblies with specific physicochemical properties. − For instance, Keggin-type anions are capable of forming non-covalent complexes in aqueous solution with the toroidal cyclodextrin (CD) macrocycles. ,− Some of these CD/Keggin hybrids have shown improved properties in sensors or in electrochemical energy storage, highlighting the beneficial effects of these supramolecular composites. CDs are natural oligosaccharides made up of six, seven, or eight glucopyranose units leading to ring-shaped molecules of different sizes, denoted, respectively, by α-, β-, and γ-CD (Figure b).…”

Pickering Interfacial Catalysts with CO2 and Magnetic Dual Response for Fast Recovering in Biphasic Reaction

“…In contrast, the development of smart nanoparticles has made it possible to efficiently recover catalysts in the Pickering interfacial catalytic system with less work time of external field and no reagent introduction. This concept provides a green and an efficient way for combination of enhancement of oxidation reaction and the rapid recovery of nanocatalysts in the biphasic reaction, avoiding the generation of toxic byproducts and the complex and energy-consuming recycling operation. − …”

Supramolecular Chemistry and Self-Organization: A Veritable Playground for Catalysis

“…Our first proposal is that the anionic catalyst lies in the aqueous phase, contrary to the Pickering catalytic systems based on amphiphilic dodecyltrimethylammonium/PW 12 O 40 NPs (see above). However, our recent investigations prove that the PW 12 O 40 3− anions have a propensity to adsorb on electrically neutral surfaces of CD/oil NPs due to their large, sticky, polarizable, and salting-in nature, leading to supramolecular hybrid core-shell CD/oil@PW 12 O 40 NPs via the "colloidal tectonics" approach [233]. These Pickering emulsions, based on hybrid NPs, behave as a highly efficient reaction medium.…”