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Updated: Aug 19, 2025
Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
Published on: August 23, 2018
Phosphine-Functionalized Core-Crosslinked Micelles and Nanogels with an Anionic Poly(styrenesulfonate) Shell:
Hui Wang1, Chantal J Abou-Fayssal1,2, Christophe Fliedel1
1CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, 31077 Toulouse CEDEX 4, France.
Stable polymer latexes were developed for catalytic hydrogenation. Modifying the polymer shell prevented coagulation, enabling efficient styrene hydrogenation and catalyst recycling, though with some performance limitations.
Area of Science:
- Polymer Chemistry
- Catalysis
- Nanotechnology
Background:
- Development of stable catalytic nanoreactors for aqueous biphasic hydrogenation.
- Challenges in catalyst loading and stability within polymer nanostructures.
Purpose of the Study:
- To synthesize stable unimolecular amphiphilic core-shell star-block polymer latexes.
- To investigate the effect of polymer shell composition on catalyst loading and stability.
- To evaluate the performance of these latexes in aqueous biphasic hydrogenation of styrene.
Main Methods:
- Convergent three-step synthesis using reversible addition-fragmentation chain-transfer (RAFT) polymerization.
- Loading of [RhCl(COD)]2 and [RhCl(COD)TPP] complexes into polymer latexes.
- Investigation of polymer-shell/rhodium interactions using model compounds.
- Aqueous biphasic hydrogenation of styrene using functionalized latexes.
Main Results:
- Homopolymer shells based on sodium styrenesulfonate led to polymer coagulation due to Rh-sulfonate interactions.
- Statistical copolymer shells (sodium styrenesulfonate/PEOMA) enabled stable loading of core-anchored [RhCl(COD)TPP] complexes.
- Rh-loaded latexes efficiently catalyzed styrene hydrogenation, with recoverable catalytic phases.
- Recycled catalysts showed inferior performance compared to those with neutral or polycationic shells.
Conclusions:
- Modification of the hydrophilic shell is crucial for preventing catalyst-induced coagulation in sulfonate-containing polymers.
- Core-anchored TPP-functionalized rhodium complexes in statistical copolymer latexes are effective for aqueous biphasic hydrogenation.
- While recyclable, the developed nanoreactors exhibit limitations in long-term catalytic performance and leaching compared to other systems.
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