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Published on: April 22, 2016
Donor-acceptor covalent organic frameworks for visible light induced free radical polymerization
Pradip Pachfule1, Amitava Acharjya1, Jérôme Roeser1
1Department of Chemistry/Functional Materials , Technische Universität Berlin , Hardenbergstraße 40 , 10623 Berlin , Germany . Email: pradip.pachfule@campus.tu-berlin.de ;
New covalent organic frameworks (COFs) act as efficient photoinitiators for visible light-induced polymerization. These stable, porous materials enable robust photochemical applications and radical transfer.
Area of Science:
- Materials Science
- Polymer Chemistry
- Photochemistry
Background:
- Covalent organic frameworks (COFs) possess conjugated, porous, and stable structures beneficial for photocatalysis.
- Donor-acceptor architectures enhance charge transport and stability in materials.
Purpose of the Study:
- To synthesize and evaluate novel donor-acceptor COFs as photoinitiators.
- To investigate their application in visible light-induced free radical polymerization.
Main Methods:
- Synthesis of two crystalline, porous donor-acceptor COFs using specific triazine and thiophene-based linkers.
- Application of synthesized COFs as photoinitiators for methyl methacrylate (MMA) polymerization under visible light.
Main Results:
- The synthesized COFs demonstrated effectiveness as photoinitiators.
- Visible light-induced polymerization of MMA to poly-methyl methacrylate (PMMA) was successfully achieved using these COFs.
Conclusions:
- Donor-acceptor COFs are viable and robust photoinitiators for visible light-driven polymerization.
- These findings support the development of heterogeneous photochemical systems for radical transfer.
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