Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 12, Pages 4250-4253Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b13379
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Funding
- University of Rochester
- NSF [CHE-1307254, CHE-1609365, EAR- 1545637]
- Novartis
- Dreyfus Foundation
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1609365] Funding Source: National Science Foundation
- Division Of Earth Sciences
- Directorate For Geosciences [1545637] Funding Source: National Science Foundation
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Photoredox catalysis has become an essential tool in organic synthesis because it enables new routes to important molecules. However, the best available molecular catalysts suffer from high catalyst loadings and rely on precious metals. Here we show that colloidal nanocrystal quantum dots (QDs) can serve as efficient and robust, precious-metal free, photoassisted redox catalysts. A single-sized CdSe quantum dot (3.0 +/- 0.2 nm) can replace several different dye catalysts needed for five different photoredox reactions (beta-alkylation, beta-aminoalkylation, dehalogenation, amine arylation, and decarboxylative radical formation). Even without optimization of the QDs or the reaction conditions, efficiencies rivaling those of the best available metal dyes were obtained.
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