Tailor‐Made Polydiacetylene Micelles for the Catalysis of 1,3‐Dipolar Cycloadditions in Water

Abstract

A colloidal catalyst was developed by complexation of copper chloride in polydiacetylene micelles. The latter were designed to accommodate and stabilize copper salts, by providing a suitable ligand environment. Micelles were valorized as nanoreactors for the promotion of the Huisgen cycloaddition reaction in water thanks to their central hydrophobic core which permitted not only aqueous dispersion, but also concentration of the reagents at the vicinity of the catalyst. The system was found to be active on a variety of substrates and efficiently operated under sustainable conditions.

Catalytic hydrothiolation of alkenes and alkynes using bimetallic RuRh nanoparticles on carbon nanotubes

“…In the last decade, we have reported a panel of nanostructured semi-heterogeneous 14 and heterogeneous catalysts. The latter were assembled on carbon nanotube templates that were used as an active support for either noble 15 or base 16 metals.…”

Gemini and Bicephalous Surfactants: A Review on Their Synthesis, Micelle Formation, and Uses

“…The micelles formed by block copolymer surfactants generally present a core-shell morphology wherein the hydrophobic segments form the core within a size range of 10-100 nm. Micellar solutions are used in some important applications, such as tertiary oil recovery [38][39][40], catalysis [41][42][43], food and cosmetics formulations [44][45][46], pharmaceutical drug delivery systems [47][48][49][50], polymer synthesis [51], etc. Pharmaceutical application of micelles is of considerable interest regarding its importance in biological systems in which therapeutic efficiency is crucial.…”

Crystal Structures of Lignocellulosic Furfuryl Biobased Polydiacetylenes with Hydrogen-Bond Networks: Influencing the Direction of Solid-State Polymerization through Modification of the Spacer Length

“…Nevertheless, some blue stains are still present on the side not exposed to UV (Figure 4b), which means that the process was done mainly on the surface and not in bulk. Fifteen (15) additional minutes of irradiation gave the crystals an almost completely golden color (Figure 4c). In Raman spectroscopy, the diacetylene peak of the monomer (2260.6 cm −1 , Figure S7) completely vanished, while typical bands of polydiacetylene at 1454.5 and 2073.5 cm −1 became the strongest signals of the spectrum (Figure S8).…”

“…Polydiacetylenes (PDAs) are a class of semiconductor polymers that have attracted the attention of the scientific community due to their unique optoelectronic properties, in particular, their blue-red colorimetric transition when the leading conjugated backbone chains are disturbed by various external stimuli. , This feature has been exploited in a wide range of sensing applications, − going from virus detection, to dosimeter system, and so on. , The synthesis of PDA has been achieved in several forms, such as liposomes (also referred to as vesicles), − micelles, − Langmuir–Blodgett films, , strips, nanotubes, , gels, , nanofibers, , and crystals. − In addition to applied research on this type of polymeric material, a fundamental understanding of the structure–property relationship of PDA can be obtained from crystallographic studies. Crystalline topochemical polymerization has been reported as an effective tool that offers control over polymers’ molecular and supramolecular structures. − A recent review has described several other advantages of topochemical polymerization in the crystalline state over conventional solution-phase polymerization .…”