Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 46, Pages 23030-23035Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp2076269
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Funding
- Japan Society for the Promotion of Science (JSPS) [B-23750247]
- Grants-in-Aid for Scientific Research [23750247] Funding Source: KAKEN
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This article examines the generation of hot-spots and their impact in the heterogeneous Suzuki-Miyaura coupling reaction for the synthesis of 4-methylbiphenyl in toluene solvent in the presence of Pd/AC. Hot-spots easily formed on the surface of the activated carbon (AC) catalyst support under high electric field conditions; they were recorded in real time using a high-speed camera. Chemical yields of 4-methylbiphenyl under the microwaves' magnetic field (H-field) were 2-fold greater than those under electric field (E-field) conditions at identical temperatures and reaction times (120 min). Microwave E-field irradiation with a high accuracy device enhanced generation of hot-spots. Excessive formation of hot-spots impacted negatively on this coupling reaction.
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