Julian G. West, T. Aaron Bedell, Prof. Erik J. Sorensen Angew. Chem. Int. Ed. 2016 , 55 , 8923 Princeton University, USA First published: 20 June 2016 DOI: 10.1002/anie.201603149 Abstract The fluorination of unactivated C(sp3)−H bonds remains a desirable and challenging transformation for pharmaceutical, agricultural, and materials scientists. Previous methods for this transformation have used bench-stable fluorine atom sources; however, many still rely on the use of UV-active photocatalysts for the requisite high-energy hydrogen atom abstraction event. Uranyl nitrate hexahydrate is described as a convenient, hydrogen atom abstraction catalyst that can mediate fluorinations of certain alkanes upon activation with visible light.