Heterogeneous photocatalytic recycling of FeX2/FeX3 for efficient halogenation of C−H bonds using NaX

Ye, Jiani, Zhang, Dongsheng, Salli, Sofia, Li, Yajiao, Han, Feiyu, Mai, Yuanqiang, Rosei, Federico, Li, Yongwang, Yang, Yong, Besenbacher, Flemming, Niemantsverdriet, Hans, Richards, Emma ORCID: https://orcid.org/0000-0001-6691-2377 and Su, Ren 2023. Heterogeneous photocatalytic recycling of FeX2/FeX3 for efficient halogenation of C−H bonds using NaX. Angewandte Chemie International Edition 62 (23) , e202302994. 10.1002/anie.202302994

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Abstract

Environmental-friendly halogenation of C−H bonds using abundant, non-toxic halogen salts is in high demand in various chemical industries, yet the efficiency and selectivity of laboratory available protocols are far behind the conventional photolytic halogenation process which uses hazardous halogen sources. Here we report an FeX2 (X=Br, Cl) coupled semiconductor system for efficient, selective, and continuous photocatalytic halogenation using NaX as halogen source under mild conditions. Herein, FeX2 catalyzes the reduction of molecular oxygen and the consumption of generated oxygen radicals, thus boosting the generation of halogen radicals and elemental halogen for direct halogenation and indirect halogenation via the formation of FeX3. Recycling of FeX2 and FeX3 during the photocatalytic process enables the halogenation of a wide range of hydrocarbons in a continuous flow, rendering it a promising method for applications.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Publisher:	Wiley
ISSN:	1433-7851
Funders:	EPSRC
Date of First Compliant Deposit:	4 May 2023
Date of Acceptance:	3 April 2023
Last Modified:	04 Apr 2024 11:38
URI:	https://orca.cardiff.ac.uk/id/eprint/159210

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