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Issue 7, 2020
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A PMMA-based heterogeneous photocatalyst for visible light-promoted [4 + 2] cycloaddition

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Abstract

Macromolecular organic photocatalysts consisting of a completely conjugated network have broad and promising applications in visible light-promoted photoredox catalysis. Precise reproduction and control of exact conjugation length remains an important challenge for fully conjugated and macromolecular photocatalysts. Here, we introduce a new photocatalytic material based on classical PMMA copolymerised with defined electron donor and acceptor units with precisely controllable redox potential and conjugation length, creating a promising class of metal-free, stable and low-cost heterogeneous photocatalysts. Furthermore, swelling of the PMMA copolymer matrix in organic solvents led to enhanced substrate diffusion and thereby increased catalytic efficiency. High efficiency and selectivity was achieved for photocatalytic [4 + 2] cycloaddition reactions in air with low effective photocatalyst loading. The photocatalytic efficiency of the PMMA photocatalyst was comparable with the state-of-the-art metal or non-metal catalysts while facilitating easy recyclability.

Graphical abstract: A PMMA-based heterogeneous photocatalyst for visible light-promoted [4 + 2] cycloaddition

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Supplementary files

Article information


Submitted
07 Jan 2020
Accepted
21 Feb 2020
First published
21 Feb 2020

This article is Open Access

Catal. Sci. Technol., 2020,10, 2092-2099
Article type
Paper

A PMMA-based heterogeneous photocatalyst for visible light-promoted [4 + 2] cycloaddition

N. Huber, R. Li, C. T. J. Ferguson, D. W. Gehrig, C. Ramanan, P. W. M. Blom, K. Landfester and K. A. I. Zhang, Catal. Sci. Technol., 2020, 10, 2092
DOI: 10.1039/D0CY00016G

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    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
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