Long wavelength near-infrared and red light-driven consecutive photo-induced electron transfer for highly effective photoredox catalysis

Le Zeng, Ling Huang, Zhi Huang, Tomoyasu Mani, Kai Huang, Chunying Duan () and Gang Han ()
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Le Zeng: University of Massachusetts Chan Medical School
Ling Huang: University of Massachusetts Chan Medical School
Zhi Huang: Nankai University
Tomoyasu Mani: University of Connecticut
Kai Huang: University of Massachusetts Chan Medical School
Chunying Duan: Dalian University of Technology
Gang Han: University of Massachusetts Chan Medical School

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Consecutive photoinduced electron transfer (conPET) processes accumulate the energies of two photons to overcome the thermodynamic limit of traditional photoredox catalysis. However, the excitation wavelength of conPET systems mainly focused on short wavelength visible light, leading to photodamage and incompatibility with large-scale reactions. Herein, we report on conPET systems triggered by near-infrared (NIR) and red light. Specifically, a blue-absorbing conPET photocatalyst, perylene diimide (PDI) is sensitized by a palladium-based photosensitizer to triplet excited state (3PDI*), which generates PDI radical anion (PDI•–) over 100-fold faster than that in the conventional conPET. Accordingly, photoreduction with superior reaction rate and penetration depth, as well as reduced photodamage is detected. More importantly, our work offers comprehensive design rules for the triplet-mediated conPET strategy, whose versatility is confirmed by metal-free dye pairs and NIR-active PtTNP/PDI. Notably, our work achieves NIR-driven atom transfer radical polymerization using an inert aromatic halide as the initiator.

Date: 2024
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DOI: 10.1038/s41467-024-50795-y

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