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Issue 36, 2019
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Donor–acceptor covalent organic frameworks for visible light induced free radical polymerization

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Abstract

Covalent organic frameworks (COFs) are promising materials for applications in photocatalysis, due to their conjugated, porous and chemically stable architectures. Alternating electron donor–acceptor-type structures are known to enhance charge carrier transport mobility and stability in polymers and are therefore also interesting building units for COFs used as photocatalysts but also as photoinitiator. In this work, two donor–acceptor COFs using electron deficient 4,4′,4′′-(1,3,5-triazine-2,4,6-triyl)trianiline and electron rich thiophene-based thieno[3,2-b]thiophene-2,5-dicarbaldehyde or [2,2′-bithiophene]-5,5′-dicarbaldehyde linkers are presented. The resulting crystalline and porous COFs have been applied as photoinitiator for visible light induced free radical polymerization of methyl methacrylate (MMA) to poly-methyl methacrylate (PMMA). These results pave the way to the development of robust and heterogeneous systems for photochemistry that offers the transfer of radicals induced by visible light.

Graphical abstract: Donor–acceptor covalent organic frameworks for visible light induced free radical polymerization

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Supplementary files

Article information


Submitted
28 May 2019
Accepted
01 Aug 2019
First published
05 Aug 2019

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2019,10, 8316-8322
Article type
Edge Article

Donor–acceptor covalent organic frameworks for visible light induced free radical polymerization

P. Pachfule, A. Acharjya, J. Roeser, R. P. Sivasankaran, M. Ye, A. Brückner, J. Schmidt and A. Thomas, Chem. Sci., 2019, 10, 8316
DOI: 10.1039/C9SC02601K

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