Nonthermal Charge Carriers Control Selectivity in Plasmon-Induced Suzuki–Miyaura Cross-Coupling Reaction on Spiked Au/Pd Nanowires
Abstract
Palladium (Pd)-catalyzed reactions, such as the Suzuki–Miyaura cross-coupling, have demonstrated significant enhancement when facilitated by hybrid Au/Pd nanostructures. However, the role of gold, through charge transfer or localized heating, remains debated. Moreover, the impact of plasmon excitation on reaction selectivity remains largely unexplored. Herein, we report a facile, two-step, room-temperature synthesis of spiked Au/Pd nanowires for visible-light-driven Suzuki–Miyaura cross-coupling under ambient conditions. The reaction was monitored in situ using liquid-state surface-enhanced Raman spectroscopy (SERS) and ex situ using gas chromatography-mass spectrometry (GC-MS). We systematically studied the cross-coupling of 4-iodothiophenol with phenyl boronic acid under varying excitation wavelengths, laser intensities, external heating, and charge carrier scavengers, revealing the distinct role of non-thermal charge carriers in selectively promoting formation of the biaryl product. In the dark, a temperature of 85 °C was required to initiate the reaction, while thiophenol was observed as a major by-product. To further validate the plasmon-induced selectivity, we performed the reaction with 4-iodotoluene entirely in solution and monitored the products using GC-MS. Under light irradiation, cross-coupling was favored over the thermally driven reactions in the dark. This highlights the role of non-thermal charge carriers in enhancing the selectivity of Suzuki cross-coupling under plasmonic excitation.
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BibTeX
@article{sarhan2026nonthermal,
title = {{Nonthermal Charge Carriers Control Selectivity in Plasmon-Induced Suzuki–Miyaura Cross-Coupling Reaction on Spiked Au/Pd Nanowires}},
author = {Radwan Sarhan and Hari Haran Srinivasalu and Sarah von Chamier Gliszczinski and Sergio Kogikoski and Yan Lu and Bernd Schmidt and Ilko Bald},
journal = {ACS Catalysis},
year = {2026},
month = jul,
doi = {10.1021/acscatal.6c01768},
url = {https://hal.science/hal-05791110v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Nonthermal Charge Carriers Control Selectivity in Plasmon-Induced Suzuki–Miyaura Cross-Coupling Reaction on Spiked Au/Pd Nanowires
AU - Radwan Sarhan
AU - Hari Haran Srinivasalu
AU - Sarah von Chamier Gliszczinski
AU - Sergio Kogikoski
AU - Yan Lu
AU - Bernd Schmidt
AU - Ilko Bald
PY - 2026
DA - 2026/07/02
JO - ACS Catalysis
DO - 10.1021/acscatal.6c01768
UR - https://hal.science/hal-05791110v1
AB - Palladium (Pd)-catalyzed reactions, such as the Suzuki–Miyaura cross-coupling, have demonstrated significant enhancement when facilitated by hybrid Au/Pd nanostructures. However, the role of gold, through charge transfer or localized heating, remains debated. Moreover, the impact of plasmon excitation on reaction selectivity remains largely unexplored. Herein, we report a facile, two-step, room-temperature synthesis of spiked Au/Pd nanowires for visible-light-driven Suzuki–Miyaura cross-coupling under ambient conditions. The reaction was monitored in situ using liquid-state surface-enhanced Raman spectroscopy (SERS) and ex situ using gas chromatography-mass spectrometry (GC-MS). We systematically studied the cross-coupling of 4-iodothiophenol with phenyl boronic acid under varying excitation wavelengths, laser intensities, external heating, and charge carrier scavengers, revealing the distinct role of non-thermal charge carriers in selectively promoting formation of the biaryl product. In the dark, a temperature of 85 °C was required to initiate the reaction, while thiophenol was observed as a major by-product. To further validate the plasmon-induced selectivity, we performed the reaction with 4-iodotoluene entirely in solution and monitored the products using GC-MS. Under light irradiation, cross-coupling was favored over the thermally driven reactions in the dark. This highlights the role of non-thermal charge carriers in enhancing the selectivity of Suzuki cross-coupling under plasmonic excitation.
SN - 2155-5435
SN - 2155-5435
ER -