Photoactive H-Bonding EDA Complex in Radical Chemistry

Electron donor-acceptor (EDA) complexes have emerged as powerful tools in radical chemistry, enabling diverse transformations under mild conditions. Among various EDA models, hydrogen‑bonding EDA (H-EDA) complexes, which utilize hydrogen‑bonding interactions to facilitate electron transfer between donors and acceptors, have attracted considerable attention in recent years. Owing to their unique advantages, broad substrate compatibility, tunable selectivity, and environmental friendliness, H‑EDA complexes represent promising candidates for advancing the fields of radical photochemistry and synthetic chemistry. This concept review delves into the foundational principles, mechanistic insights, and synthetic applications of H-EDA complexes in radical chemistry, and forward-looking perspectives on the future research trajectories of this field.