Continuous Flow Photo-oxidations Using Supported Photocatalysts on Silica

The immobilization of soluble photocatalysts, or photosensitizers, has the potential to reduce the environmental footprint as well as the costs associated with visible-light photochemical processes. We report here on the straightforward preparation of photocatalysts non-covalently supported on silic...

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Bibliographic Details
Published in:Organic process research & development 2020-05, Vol.24 (5), p.822-826
Main Authors: Blanchard, Vincent, Asbai, Zakariae, Cottet, Kevin, Boissonnat, Guillaume, Port, Marc, Amara, Zacharias
Format: Article
Language:English
Subjects:
Chemical Sciences
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Summary:The immobilization of soluble photocatalysts, or photosensitizers, has the potential to reduce the environmental footprint as well as the costs associated with visible-light photochemical processes. We report here on the straightforward preparation of photocatalysts non-covalently supported on silica using electrostatic interactions and compare the activities of these new photocatalytic systems in the photo-oxidation of 1,5-dihydroxynaphthalene to juglone in batch and in a fixed-bed flow reactor. This study demonstrates that simple immobilization strategies can produce stable heterogeneous photocatalysts and provide promising processing options with an up to 24-fold improvement in productivity in flow relative to batch.
ISSN:1083-6160
1520-586X
DOI:10.1021/acs.oprd.9b00420