A convenient approach to amphiphilic hyperbranched polymers with thioether shell for the preparation and stabilization of coinage metal (Cu, Ag, Au) nanoparticles

Abstract

Partially functionalized hyperbranched polyglycerols with thioether units have been straight forwardly prepared, leading to globular polymers with core‐shell structure. They are been used as an excellent platform for the preparation and stabilization of long‐term stable coinage metal nanoparticles such as copper (less than 4 nm) and silver (1 to 2 nm) nanoclusters, as well as aggregated gold nanoparticles (12 nm).

Phosphorus-containing polymers from tetrakis-(hydroxymethyl)phosphonium sulfateiii. A new hydrolysis-resistant tris(allyloxymethyl)phosphine oxide and its thiol-ene reaction under ultraviolet irradiation

“…The absorption peaks at 1644 cm À1 for C]C double bond and at 2535 cm À1 for S-H bond completely disappeared within 5 minutes, which implies that all monomers were consumed to form a highly crosslinked polymer network. 36 According to optimal polymerization conditions, a series of cured polymer samples were prepared. All samples were transparent with light yellow color.…”

Phase-Separated Thiol–Epoxy–Acrylate Hybrid Polymer Networks with Controlled Cross-Link Density Synthesized by Simultaneous Thiol–Acrylate and Thiol–Epoxy Click Reactions

“…Here, thiol–epoxy–acrylate HPNs are formed by a combination of nucleophilic base-catalyzed thiol–acrylate Michael addition and thiol–epoxy coupling reactions in a one-pot synthesis. Both of these thiol-based reactions have shown effectiveness in organic synthesis and modifications. − (Photoinitiated radical-based thiol–acrylate reactions are not employed here in order to eliminate the potential of chain-growth radical homopolymerization of acrylate monomers, which can lead to incomplete thiol conversion and result in a dramatic decrease in the performance of the cured materials. ,, ) A stoichiometric balance between thiol groups (multifunctional thiols with a thiol functionality greater than two) and the sum of epoxide (difunctional epoxy) and acrylate groups (difunctional acrylate) is applied in the reactant mixture. With relatively high molecular weight (MW = 2000 g mol –1 ) acrylates, phase-separated network materials are produced, as evidenced by the presence of two T g s from both differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) as well as morphology characterization by scanning electron microscopy (SEM).…”

Synthesis of hyperbranched poly(ether nitrile)s as supporting polymers for palladium nanoparticles

“…Hyperbranched aramids, polyamidoamines and polyethyleneimines have been reported as supports for metal NPs. [33][34][35][36][37][38][39][40][41] The interactions of gold, silver and copper ions with primary, secondary and tertiary amino groups in hyperbranched polymers assist in the formation of nanosized metal particles. It has also been noted that the open structure of hyperbranched polymers facilitates the interactions of the metal ions with the internal functional groups.…”