Improving the rate of the copper-catalyzed Henry reaction by surface plasmon excitation of gold nanoparticles

Green LED plasmon excitation (525 nm) of colloidal gold nanoparticles (NPs), onto which a copper( ii ) complex was grafted, in the presence of nitrobenzaldehyde and nitromethane in DMF lead to the formation of the corresponding nitroaldol with high efficiency. Kinetic studies using 1 H NMR and Raman...

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Veröffentlicht in:Catalysis science & technology 2021-12, Vol.11 (24), p.7875-7885
Hauptverfasser: Gimeno, Léa, Picardi, Gennaro, Planchat, Aurélien, Knight, D. Andrew, Lamy de la Chapelle, Marc, Humbert, Bernard, Queffélec, Clémence
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Sprache:eng
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Zusammenfassung:Green LED plasmon excitation (525 nm) of colloidal gold nanoparticles (NPs), onto which a copper( ii ) complex was grafted, in the presence of nitrobenzaldehyde and nitromethane in DMF lead to the formation of the corresponding nitroaldol with high efficiency. Kinetic studies using 1 H NMR and Raman spectroscopies showed that the reaction was faster under irradiation with green light, especially when in close proximity to the NPs ( ca. 100% conversion after 100 min). After reaction completion, it was possible to recover the nanocatalyst and run two subsequent reactions. Green LED excitation of plasmonic nanocatalyst is shown to be a straightforward and efficient method for accelerating the rate of the Henry reaction with a lower energy demand and over a shorter reaction time when compared to the reaction performed under classical conditions. Green plasmon excitation of colloidal Au nanoparticles, onto which a copper( ii ) complex was grafted, in the presence of nitrobenzaldehyde and nitromethane in DMF, lead to the formation of the corresponding nitroaldol with high efficiency.
ISSN:2044-4753
2044-4761
DOI:10.1039/d1cy01788h