Precise growth of polymer brushes on silica-based nanocomposites <i>via</i> visible-light-regulated controlled radical polymerization

Li, Xue; S, Ye; Huang, Ya; Li, Jia Le; Cai, Tao

doi:10.1039/c9ta00905a

Cited by 21 publications

(17 citation statements)

References 36 publications

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“…[8] More sophisticated systems utilizing enzymes [9] or dye/ ascorbic acid combinations, [10] convert molecular oxygen into hydrogen peroxide,w hich may be further used for radical production. [13] In our continued evaluation of porphyrins for application in photoinduced electron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization at longer wavelengths,w e have come across av ery peculiar photocatalytic system. [13] In our continued evaluation of porphyrins for application in photoinduced electron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization at longer wavelengths,w e have come across av ery peculiar photocatalytic system.…”

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confidence: 99%

An Oxygen Paradox: Catalytic Use of Oxygen in Radical Photopolymerization

Zhang

Jung

et al. 2019

Angew Chem Int Ed

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Ap eculiar radical polymerization reaction is presented in which oxygen serves as ac ocatalyst, alongside triethylamine,t op rovide activation with light in the far-red (690 nm, 3mWcm À2 )o ft he PET-RAFT process in the presence of zinc(II) (2,3,7,8,12,13,17,18-octaethyl-5,10,15,20tetraphenylporphyrin) as photocatalyst. Apart from the ability to exert temporal control by switching the light on or off,t his system possesses the exciting capability of inducing temporal control by removal or reintroduction of oxygen. Furthermore, this multicomponent catalytic system was typified by controlled polymerizations of various acrylate and acrylamide monomers,w hicha ll resulted in well-defined polymers with low dispersity (< 1.2). The process displayed excellent living characteristics that were demonstrated through chain extensions and ar ange of degrees of polymerization (200-1600).Scheme 1. ZnOETPP-catalyzed PET-RAFT photopolymerization proceeds only in the presence of atertiary aliphatica mine and oxygen.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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confidence: 99%

An Oxygen Paradox: Catalytic Use of Oxygen in Radical Photopolymerization

Zhang

Jung

et al. 2019

Angew Chem Int Ed

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“…Visible‐light‐mediated polymerizations are receiving significant interest for the production of functional polymers and nanomaterials . In our continued evaluation of porphyrins for application in photoinduced electron/energy transfer–reversible addition‐fragmentation chain transfer (PET‐RAFT) polymerization at longer wavelengths, we have come across a very peculiar photocatalytic system.…”

Section: Methodsmentioning

confidence: 99%

“…[9d,11] Visible-light-mediated polymerizations are receiving significant interest for the production of functional polymers [12] and nanomaterials. [13] In our continued evaluation of porphyrins for application in photoinduced electron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization at longer wavelengths,w e have come across av ery peculiar photocatalytic system. Indeed, zinc(II) 2,3,7,8,12,13,17,18-(octaethyl)-5,10,15,20-(tetraphenyl) porphyrin (ZnOETPP) exhibits polymerization only when it is irradiated in the presence of oxygen and at ertiary aliphatic amine (Scheme 1).…”

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confidence: 99%

An Oxygen Paradox: Catalytic Use of Oxygen in Radical Photopolymerization

Zhang

Jung

et al. 2019

Angewandte Chemie

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A peculiar radical polymerization reaction is presented in which oxygen serves as a cocatalyst, alongside triethylamine, to provide activation with light in the far‐red (690 nm, 3 mW cm−2) of the PET‐RAFT process in the presence of zinc(II) (2,3,7,8,12,13,17,18‐octaethyl‐5,10,15,20‐tetraphenylporphyrin) as photocatalyst. Apart from the ability to exert temporal control by switching the light on or off, this system possesses the exciting capability of inducing temporal control by removal or reintroduction of oxygen. Furthermore, this multicomponent catalytic system was typified by controlled polymerizations of various acrylate and acrylamide monomers, which all resulted in well‐defined polymers with low dispersity (<1.2). The process displayed excellent living characteristics that were demonstrated through chain extensions and a range of degrees of polymerization (200–1600).

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“…Egap and coworkers [ 42 ] selected cadmium selenide (CdSe) quantum dots as the photocatalyst and were able to create QDs-PMMA nanocomposite material in one-pot polymerization. Moreover, Silicon Quantum Dots (SiQDs) [ 80 ] with amino end-functionality have been anchored to silicon wafer substrate exploiting electrostatic interaction and further used as photocatalyst for surface-initiated PET-RAFT polymerization, as shown in Figure 11 . The role of SiQDs is therefore to connect polymer with the substrate along with photocatalytic purpose.…”

Section: Applicationsmentioning

confidence: 99%

New Light in Polymer Science: Photoinduced Reversible Addition-Fragmentation Chain Transfer Polymerization (PET-RAFT) as Innovative Strategy for the Synthesis of Advanced Materials

Bellotti

Simonutti

2021

Polymers

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Photochemistry has attracted great interest in the last decades in the field of polymer and material science for the synthesis of innovative materials. The merging of photochemistry and reversible-deactivation radical polymerizations (RDRP) provides good reaction control and can simplify elaborate reaction protocols. These advantages open the doors to multidisciplinary fields going from composite materials to bio-applications. Photoinduced Electron/Energy Transfer Reversible Addition-Fragmentation Chain-Transfer (PET-RAFT) polymerization, proposed for the first time in 2014, presents significant advantages compared to other photochemical techniques in terms of applicability, cost, and sustainability. This review has the aim of providing to the readers the basic knowledge of PET-RAFT polymerization and explores the new possibilities that this innovative technique offers in terms of industrial applications, new materials production, and green conditions.

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Precise growth of polymer brushes on silica-based nanocomposites via visible-light-regulated controlled radical polymerization

Abstract: Precise control over molecular variables of grafted polymer brushes is of crucial importance for obtaining polymer nanocomposites with desirable architectures and physicochemical properties, yet it remains a significant synthetic challenge.

Cited by 21 publications

References 36 publications

An Oxygen Paradox: Catalytic Use of Oxygen in Radical Photopolymerization

An Oxygen Paradox: Catalytic Use of Oxygen in Radical Photopolymerization

An Oxygen Paradox: Catalytic Use of Oxygen in Radical Photopolymerization

New Light in Polymer Science: Photoinduced Reversible Addition-Fragmentation Chain Transfer Polymerization (PET-RAFT) as Innovative Strategy for the Synthesis of Advanced Materials

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