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Emulsion-Directed Synthesis of Poly-Porphyrin Nanoparticles as Heterogeneous Photocatalysts for PET-RAFT
Peng Xie1, Weifeng Yan1, Hongyu Ji1
1School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
Macromolecular Rapid Communications
|August 12, 2023
Summary
This study introduces zinc porphyrin nanoparticles as efficient heterogeneous photocatalysts for controlled polymerization. These recyclable nanoparticles offer enhanced activity and temporal control under visible light, demonstrating broad applicability in methacrylate monomer polymerization.
Area of Science:
- Polymer Chemistry
- Materials Science
- Photocatalysis
Background:
- Heterogeneous photocatalysts are vital for photo-induced electron transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization.
- Their advantages include ease of preparation, tunable properties, and recyclability.
Purpose of the Study:
- To construct and investigate zinc (II) 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (ZnTAPP)-based poly-porphyrin nanoparticles (PTAPP-Zn) as heterogeneous photocatalysts.
- To evaluate their performance in PET-RAFT polymerization of methacrylate monomers under visible light.
- To explore the effect of pore size on photocatalytic activity.
Main Methods:
- Emulsion-directed approach for constructing PTAPP-Zn nanoparticles.
- Utilizing PTAPP-Zn nanoparticles as photocatalysts for PET-RAFT polymerization.
- Investigating polymerization control, monomer conversion, oxygen tolerance, and temporal control.
Main Results:
- PTAPP-Zn nanoparticles demonstrated refined polymerization control and high monomer conversions for various methacrylate monomers.
- Larger pore size in PTAPP-Zn nanoparticles correlated with enhanced photocatalytic activity.
- The photocatalyst exhibited oxygen tolerance and temporal control capabilities.
- PTAPP-Zn particles were easily recycled and reused without significant loss of catalytic efficiency.
Conclusions:
- PTAPP-Zn nanoparticles are effective heterogeneous photocatalysts for visible-light-driven PET-RAFT polymerization.
- Nanoparticle pore size is a critical factor influencing photocatalytic efficiency.
- The developed system offers a robust, recyclable, and controllable method for polymer synthesis.
