Synthesis, Characterization, and Photocatalytic Performance of Phosphorus-Functionalized Triazatriangulenium...

Herein, the first one-pot introduction of variable numbers of diphenylphosphoryl (Ph₂PO) groups into the TATA⁺ framework was achieved via S_NAr. Subsequent reduction and quaternization yielded a series of phosphorus-functionalized TATA⁺ derivatives, whose frontier orbital distributions, energy levels, and photophysical/electrochemical properties were effectively modulated. Notably, [(PMePh₂)₃-TATA][OTf]₄ and [DPPO-TATA][OTf] are efficient catalysts in several oxidative and reductive quenching pathways, respectively, highlighting the potential of these TATA⁺ derivatives as versatile organic photocatalysts.