Triphenylamine‐Enhanced Aqueous Artificial Light‐Harvesting System for ¹ O ₂ Production

An aggregation‐induced emission‐enhanced aqueous artificial light‐harvesting system (LHS) was constructed by the host–guest coassembly of water‐soluble phosphate‐pillar[5]arene (WPP5), triphenylamine‐modified bisphenyl acrylonitrile guest (TPA–BPA), and sulforhodamine 101 (SR101) pigment. Due to the electron‐donating capability of triphenylamine (TPA) moiety, the aggregated WPP5–TPA–BPA emitted green fluorescence and served as energy donor for energy transfer. After coassembling SR101 into WPP5–TPA–BPA nanoparticles, a distinct fluorescence resonance energy transfer process was observed in WPP5–TPA–BPA–SR101 nanoparticles, demonstrating the construction of WPP5–TPA–BPA–SR101 LHS. The energy transfer efficiency and antenna effect reached 73.3% and 51.2 at TPA–BPA/SR101 molar ratio of 200:1, suggesting an efficient light‐harvesting ability in water. Notably, WPP5–TPA–BPA–SR101 LHS exhibited the brilliant singlet oxygen ( 1 O 2 ) production under 365 nm irradiation, which achieved the successful conversion of the harvested solar energy into chemical energy, suggesting potential in artificial photooxidation materials.