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Unexpected Hydrated Electron Source for Preparative Visible-Light Driven Photoredox Catalysis

Kerzig, Christoph and Guo, Xingwei and Wenger, Oliver S.. (2019) Unexpected Hydrated Electron Source for Preparative Visible-Light Driven Photoredox Catalysis. Journal of the American Chemical Society, 141 (5). pp. 2122-2127.

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Official URL: https://edoc.unibas.ch/73099/

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Abstract

The hydrated electron is experiencing a renaissance as a superreductant in lab-scale reductions driven by light, both for the degradation of recalcitrant pollutants and for challenging chemical reactions. However, examples for its sustainable generation under mild conditions are scarce. By combining a water-soluble Ir catalyst with unique photochemical properties and an inexpensive diode laser as light source, we produce hydrated electrons through a two-photon mechanism previously thought to be unimportant for laboratory applications. Adding cheap sacrificial donors turns our new hydrated electron source into a catalytic cycle operating in pure water over a wide pH range. Not only is that catalytic system capable of detoxifying a chlorinated model compound with turnover numbers of up to 200, but it can also be employed for two novel hydrated electron reactions, namely, the decomposition of quaternary ammonium compounds and the conversion of trifluoromethyl to difluoromethyl groups.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Wenger)
UniBasel Contributors:Wenger, Oliver and Kerzig, Christoph and Guo, Xingwei
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
ISSN:0002-7863
e-ISSN:1520-5126
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:10 Dec 2019 15:39
Deposited On:10 Dec 2019 15:38

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