Donor-acceptor (D-A) molecules are key motifs in electron transfer processes. Recently, significant progress has been made in the development of organic synthetic reactions that utilize D-A molecules as photoredox catalysts. In these electron-transfer reactions, preventing undesired back-electron transfer and achieving efficient conversion is essential. In this Perspective, we introduce two examples in which the dynamic effects of excitons derived from catalyst molecules are controlled through precise molecular design.
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