Covalently linked molecular catalysts in conjugated polymer dots boost photocatalytic alcohol oxidation in neutral condition

Sicong Wang, Mariia V. Pavliuk, Xianshao Zou, Ping Huang, Bin Cai, Orpita M. Svensson and Haining Tian ()
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Sicong Wang: Uppsala University
Mariia V. Pavliuk: Uppsala University
Xianshao Zou: Harbin Engineering University
Ping Huang: Uppsala University
Bin Cai: Uppsala University
Orpita M. Svensson: Uppsala University
Haining Tian: Uppsala University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract As a new class of organic photocatalysts, polymer dots show a potential application in photocatalytic hydrogen peroxide production coupled with chemical oxidation such as methanol oxidation. However, the poor methanol oxidation ability by polymer dots still inhibits the overall photocatalytic reaction occurring in the neutral condition. In this work, an organic molecular catalyst 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl radical is covalently linked to a fluorene unit in a polymer skeleton, eventually enabling photocatalytic hydrogen peroxide production coupled with methanol oxidation in the neutral condition. By conducting various spectroscopic measurements, charge transfer between components in this molecular catalyst-immobilized polymer dots system is studied and found to be very efficient for hydrogen peroxide production coupled with alcohol oxidation. This work proves a strategy for designing polymer dots photocatalysts with molecular catalysts, facilitating their future development and potential applications in other fields such as water splitting, CO2 reduction, photoredox catalysis and photodynamic therapy.

Date: 2024
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DOI: 10.1038/s41467-024-51097-z

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