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Plasmonic heating using an easily recyclable Pd‐functionalized Fe 3 O 4 /Au core‐shell nanoparticle catalyst for the Suzuki and Sonogashira reaction
Author(s) -
De Cattelle Amaury,
Billen Arne,
Brullot Ward,
Verbiest Thierry,
Koeckelberghs Guy
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5648
Subject(s) - sonogashira coupling , catalysis , nanoparticle , chemistry , plasmon , suzuki reaction , surface plasmon resonance , palladium , substrate (aquarium) , colloidal gold , coupling reaction , heterogeneous catalysis , chemical engineering , nanotechnology , photochemistry , materials science , organic chemistry , optoelectronics , engineering , oceanography , geology
Palladium functionalized gold nanoparticles were used in the past as a catalyst system in light induced cross‐coupling reactions, but with a main limitation of the recuperation. To overcome this problem, a palladium functionalized Fe 3 O 4 /Au core‐shell nanoparticle was successfully synthesized with a peak wavelength of 680 nm from the plasmon resonance of the gold shell. By the presence of the magnetite core, the nanoparticle catalyst can easily be removed using magnetic precipitation. This is accompanied with the advantage of having less valuable gold present in the system. The gold shell makes it possible to induce local heating using plasmon resonance. By this combination, it is possible to recuperate the catalyst system using magnetic precipitation and increase the control and safety of the reaction due to the presence of the light‐induced plasmonic heating. It was possible to perform light‐induced Suzuki cross‐coupling reactions using this catalyst system, but with a dependency of the substrate. It was found that an anionic substrate is repulsed from the negatively charged core‐shell nanoparticle. The catalyst was examined on its recuperation abilities and could be reused up to 5 cycles. At the catalytic site a temperature was reached between 40 °C and 45 °C. Despite the promising results of the Suzuki reaction, it was not possible to perform light‐induced Sonogashira reactions due to the insufficient heat generation at the catalytic site. Nevertheless, these results are promising in the development of an easily recyclable catalyst together with an alternative heating source, resulting in an increase of control and safety.