Controlling selectivity of hydrogen atom transfer (HAT) in photoredox catalysis

Ignacio Funes-Ardoiz (Ramón y Cajal researcher at the University of La Rioja) and Pablo Garrido-Barros (Ramón y Cajal researcher at the University of Granada) discuss the importance of using light as energy input in photoredox catalysis with a special focus on controlling hydrogen atom transfer (HAT) reactions in both oxidative and reductive activation, including the importance of polarity-match effects in selectivity.