An aqueous photo-controlled polymerization under NIR wavelengths: synthesis of polymeric nanoparticles through thick barriers

Wu, Zilong; Fang, Wenbo; Wu, Chenyu; Corrigan, Nathaniel; Zhang, Tong; Xu, Sihao; Boyer, Cyrille

doi:10.1039/d2sc03952d

Cited by 53 publications

(86 citation statements)

References 104 publications

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“…66 The method was later expanded to several other photoredox systems, allowing polymerization under longer wavelength light. [70][71][72][73][74][75][76] Eosin Y is one of the most widely used photocatalysts, [77][78][79] especially for biological applications, due to its solubility in water, low toxicity, and cost. PET-RAFT catalyzed by eosin Y has recently been used to engineer protein and cell surfaces.…”

Section: Introductionmentioning

confidence: 99%

Open-air green-light-driven ATRP enabled by dual photoredox/copper catalysis

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Open-air green-light-driven ATRP enabled by dual photoredox/copper catalysis

et al. 2022

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“…For oxygen tolerance, however, they required significant amounts of sacrificial reducing agents, such as tertiary amines and ascorbic acid, and did not exhibit full-spectrum absorption. More examples of previously reported PC systems for PET-RAFT polymerizations that satisfy either of those requirements are summarized in Figure S1. ,− …”

Section: Introductionmentioning

confidence: 99%

Silver Sulfide Nanocrystals as a Biocompatible and Full-Spectrum Photocatalyst for Efficient Light-Driven Polymerization under Aqueous and Ambient Conditions

Song

Kim

et al. 2022

ACS Catal.

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Owing to current global environmental concerns, polymers must be prepared under eco-friendly reaction conditions based on sustainable chemistry. In this context, highly efficient photoinduced energy/electron transfer reversible addition− fragmentation chain-transfer (PET-RAFT) polymerization under ambient/aqueous conditions without additives and/or with the aid of sunlight is the optimal approach for producing polymers with well-defined structures. This can be accomplished with a photocatalyst (PC) that utilizes the full spectrum of sunlight for maximum efficiency and has excellent water solubility or dispersibility, oxygen tolerance, and biocompatibility. However, a PC with all of these features has not yet been developed. In this study, we confirmed that this could be achieved using Ag 2 S nanocrystals (NCs) as photocatalysts. The sufficient reducing power of Ag 2 S NCs enabled the successful aqueous PET-RAFT polymerization of numerous acrylic monomers under ambient natural sunlight illumination without any additives. Under illumination, the small band gap of Ag 2 S NCs suppressed the generation of singlet oxygen, resulting in low cytotoxicity toward three different cell lines. Finally, we demonstrated that PET-RAFT polymerization with Ag 2 S NCs can be accomplished in biologically relevant media under natural sunlight illumination, indicating adequate biocompatibility and efficacy of the system.

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“…32 Later, the same research group further investigated NIR light-mediated radical polymerization 33 and even applied NIR light to photoinduced polymerizationinduced self-assembly, producing polymeric nanostructures with diverse morphologies. 34 Besides, perovskite NCs were already employed as the photocatalyst to initiate PET-RAFT polymerization under NIR light (λ = 800 nm) via the activation process through two photon absorption routes.…”

Section: ■ Introductionmentioning

confidence: 99%

“…They also found that a photoinitiation system regulated by NIR light employing the strong Q-bands of aluminum phthalocyanine and aluminum napthalocyanin, giving rise to controlled RAFT polymerization with a surprisingly high rate . Later, the same research group further investigated NIR light-mediated radical polymerization and even applied NIR light to photoinduced polymerization-induced self-assembly, producing polymeric nanostructures with diverse morphologies . Besides, perovskite NCs were already employed as the photocatalyst to initiate PET-RAFT polymerization under NIR light (λ = 800 nm) via the activation process through two photon absorption routes.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Near-Infrared Photoinduced Electron/Energy Transfer-Reversible Addition–Fragmentation Chain Transfer Polymerization via the Energy Transfer Upconversion Mechanism

et al. 2022

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Near-infrared (NIR) light-mediated polymerization has been of particular interest owing to the deep penetration into opaque materials, giving rise to great potential for biomedical applications and solar photochemistry. Photoinduced electron/energy transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization presented unprecedented spatiotemporal control over the controlled radical polymerization process. Herein, we greatly extended the NIR region up to 980 nm by introducing rationally designed upconversion nanocrystals with low toxicity and resistance to photobleaching into PET-RAFT polymerization. Well-defined polymers with predictable molecular weight and narrow dispersity were prepared within a few hours by 980 nm NIR light-regulated PET-RAFT polymerization via the energy transfer upconversion mechanism. The livingness feature of this photopolymerization was confirmed by polymerization kinetics, chain extension experiments, and multiple controlled “on–off” light switching cycles. Furthermore, the polymerizations could be successfully performed using different monomers, in the presence of several visible light-proof barriers (i.e., pork/chicken skin) and even under aerobic conditions, demonstrating the multifold advantages of our approach.

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An aqueous photo-controlled polymerization under NIR wavelengths: synthesis of polymeric nanoparticles through thick barriers

Abstract: We report an aqueous and near-infrared (NIR) light mediated photoinduced reversible addition−fragmentation chain transfer (photo-RAFT) polymerization system using tetrasulfonated zinc phthalocyanine (ZnPcS4-) as a photocatalyst. Owing to the high catalytic...

Cited by 53 publications

References 104 publications

Open-air green-light-driven ATRP enabled by dual photoredox/copper catalysis

Open-air green-light-driven ATRP enabled by dual photoredox/copper catalysis

Silver Sulfide Nanocrystals as a Biocompatible and Full-Spectrum Photocatalyst for Efficient Light-Driven Polymerization under Aqueous and Ambient Conditions

Highly Efficient Near-Infrared Photoinduced Electron/Energy Transfer-Reversible Addition–Fragmentation Chain Transfer Polymerization via the Energy Transfer Upconversion Mechanism

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