Triplet-Forming Thionated Donor-Acceptor Chromophores for Electrochemically Amphoteric Photosensitization

Thiocarbonylation has been shown to be a promising tool for developing heavy-atom-free triplet photosensitizers from donor−acceptor chromophores. It was demonstrated that triplet-state formation from the thiocarbonyls is independent of the donor−acceptor interactions and that the thionated chromophores can be utilized as amphoteric photoredox catalysts that have comparable catalytic activities to common inorganic photosensitizers.