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 |
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Format: | Artikel |
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. |
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ISSN: | 2044-4753 2044-4761 |
DOI: | 10.1039/d1cy01788h |