Biotin‐Engineered Phenothiazine Photosensitizer Boosts Type I Photodynamic Therapy via Singlet‐Excited‐State Electron Transfer
Type II‐dominant photosensitizers often suffer from reduced photodynamic efficacy under tumor hypoxia. We report a biotin‐modified phenothiazine photosensitizer termed DHU‐Blue‐7, which converts type II methylene blue (MB)‐like photosensitization into a type I pathway via regulating excited‐state characteristics, w...