Hydration-Gated Photoinduced Electron Transfer in BODIPY Dyes.
Fluorescent probes based on photoinduced electron transfer (PET) are widely used to image intracellular environments. Here we report donor-acceptor dyads based on the BODIPY chromophore in which PET is selectively activated upon hydration. Replacing fluorine groups at boron with triethylene glycol (TEG) chains confers...