Issue 7, 2020

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

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

Supplementary files

Article information

Article type
Paper
Submitted
07 जनवरी 2020
Accepted
21 फरवरी 2020
First published
21 फरवरी 2020
This article is Open Access
Creative Commons BY license

Catal. Sci. Technol., 2020,10, 2092-2099

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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