• • CTF-TBT achieves a 2.1-fold enhancement in photocatalytic oxidation rate compared to single-acceptor CTFs, with a quantum efficiency of 8.7% at 420 nm, demonstrating the efficacy of dual-acceptor design in boosting charge separation.
• • The built-in electric field strength in CTF-TBT is calculated to be 0.32 V/nm via DFT, which is 1.8 times higher than that of the single-acceptor counterpart, directly correlating with enhanced exciton dissociation efficiency.
• • Time-resolved photoluminescence spectroscopy reveals a 3.4-fold increase in exciton lifetime (from 1.2 ns to 4.1 ns) for CTF-TBT, indicating suppressed charge recombination and prolonged carrier diffusion length.
• • In photocatalytic oxidation of benzylamine to imine, CTF-TBT achieves 98% conversion with 99% selectivity under visible light (λ > 420 nm) within 4 hours, outperforming conventional metal oxide photocatalysts by a factor of 5 in turnover frequency (TOF).