Journal
CHEMICAL SCIENCE
Volume 11, Issue 30, Pages 7864-7870Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0sc02718a
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Funding
- Canada Research Chair (Tier 1) foundation
- Natural Science and Engineering Research Council of Canada
- Fonds de recherche du Quebec -Nature et Technologies
- Canada Foundation for Innovation (CFI)
- McGill University
- Emissions Reduction Alberta
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Employing photo-energy to drive the desired chemical transformation has been a long pursued subject. The development of homogeneous photoredox catalysts in radical coupling reactions has been truly phenomenal, however, with apparent disadvantages such as the difficulty in separating the catalyst and the frequent requirement of scarce noble metals. We therefore envisioned the use of a hyper-stable III-V photosensitizing semiconductor with a tunable Fermi level and energy band as a readily isolable and recyclable heterogeneous photoredox catalyst for radical coupling reactions. Using the carbonyl coupling reaction as a proof-of-concept, herein, we report a photo-pinacol coupling reaction catalyzed by GaN nanowires under ambient light at room temperature with methanol as a solvent and sacrificial reagent. By simply tuning the dopant, the GaN nanowire shows significantly enhanced electronic properties. The catalyst showed excellent stability, reusability and functional tolerance. All reactions could be accomplished with a single piece of nanowire on Si-wafer.
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