We present a red light-activated zinc bis(dipyrrin) symmetry breaking charge transfer (SBCT) architecture, showing a large molar absorption coefficient ( = 15.4 × 10 M cm), high reactive singlet oxygen generation efficiency ( ≈ 0.8) and long-lived triplet state ( = 150 μs) compared to the donor-acceptor analogue dipyrrin-BF complex, highlighting the superiority of the SBCT approach. For the first time, we demonstrated the potential of a SBCT scaffold in red-light-induced methyl methacrylate (MMA) polymerization, using a dual photocatalyst excitation approach.
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