Used as a photocatalyst in organic transformations, particularly in visible-light-mediated reactions. It facilitates carbon-carbon and carbon-heteroatom bond formations under mild conditions. Commonly employed in photoredox catalysis for synthetic applications in pharmaceuticals and fine chemicals. Exhibits strong oxidizing ability in its excited state, enabling reactions such as dehalogenations, cyclizations, and radical additions. Also utilized in mechanistic studies involving electron transfer processes due to its well-defined redox behavior.