RAFT-mediated, visible light-initiated single unit monomer insertion and its application in the synthesis of sequence-defined polymers

2017 ◽  
Vol 8 (32) ◽  
pp. 4637-4643 ◽  
Author(s):  
Changkui Fu ◽  
Zixuan Huang ◽  
Craig J. Hawker ◽  
Graeme Moad ◽  
Jiangtao Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Single Unit ◽  
Chain Transfer ◽  
Low Intensity ◽  
Catalyst Free ◽  
Reversible Addition

In this communication, we report a catalyst-free methodology for single unit monomer insertion (SUMI) into reversible addition–fragmentation chain transfer (RAFT) agents initiated by low intensity visible light.

PET-RAFT single unit monomer insertion of β-methylstyrene derivatives: RAFT degradation and reaction selectivity

2021 ◽  
Author(s):  
Lei Zhang ◽  
Ruizhe Liu ◽  
Shiyang Lin ◽  
Jiangtao Xu
Keyword(s):  
Reaction Kinetics ◽  
Single Unit ◽  
Chain Transfer ◽  
Fast Reaction ◽  
Reaction Selectivity ◽  
Reversible Addition

Reversible addition-fragmentation chain transfer (RAFT) single unit monomer insertion (SUMI) of β-Methylstyrene derivatives into diverse RAFT agents presented fast reaction kinetics, but a significant degradation of the SUMI products occurred...

The photo-controlled polymerization-induced self-assembly and reorganization process for fabrication of polymeric nanomaterials

2017 ◽  
Vol 1 (6) ◽  
pp. 1200-1206 ◽  
Author(s):  
Jiemei Zhou ◽  
Chunyan Hong ◽  
Caiyuan Pan
Keyword(s):  
Visible Light ◽  
Self Assembly ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Controlled Polymerization ◽  
Dimethylaminoethyl Methacrylate ◽  
Reversible Addition

A visible light mediated reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization of benzyl methacrylate (BzMA) is conducted in ethanol using poly(2-dimethylaminoethyl methacrylate) (PDMAEMA) as a macro-chain transfer agent (macro-CTA), affording polymeric nanomaterials with various morphologies.

Organo-photocatalysts for photoinduced electron transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization

2015 ◽  
Vol 6 (31) ◽  
pp. 5615-5624 ◽  
Author(s):  
Jiangtao Xu ◽  
Sivaprakash Shanmugam ◽  
Hien T. Duong ◽  
Cyrille Boyer
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Photoinduced Electron Transfer ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Reversible Addition ◽  
Methacrylate Monomers

In this work, we demonstrate the use of organophotoredox catalysts under visible light to perform photoinduced electron transfer-reversible addition fragmentation chain transfer (PET-RAFT) for the polymerization of methacrylate monomers.

Manganese carbonyl induced cationic reversible addition–fragmentation chain transfer (C-RAFT) polymerization under visible light

2020 ◽  
Vol 11 (15) ◽  
pp. 2724-2731 ◽  
Author(s):  
Jiajia Li ◽  
Andrew Kerr ◽  
Satu Häkkinen ◽  
Thomas Floyd ◽  
Mengmeng Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Vinyl Ethers ◽  
Organic Halide ◽  
Abstraction Reaction ◽  
Reversible Addition ◽  
Manganese Carbonyl

Vinyl ethers were polymerized by C-RAFT polymerization on the basis of halide abstraction reaction of manganese carbonyl and organic halide.

Effect of Nitrogen type on Carbon Dot Photocatalysts for Visible-Light-Induced Atom Transfer Radical Polymerization

2021 ◽  
Author(s):  
Qianqian Hao ◽  
Liang Qiao ◽  
Ge Shi ◽  
Yanjie He ◽  
Zhe Cui ◽  
...  
Keyword(s):  
Visible Light ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Carbon Dots ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Atom Transfer ◽  
Environment Friendly ◽  
Carbon Dot ◽  
Reversible Addition

Recently, carbon dots (CDs) has been utilized as an efficient and environment friendly catalyst for photo-induced atom transfer radical polymerization (ATRP) and reversible addition–fragmentation chain-transfer (RAFT) polymerization. Here we explored...

scholarly journals Reversing RAFT Polymerization: Near-Quantitative Monomer Generation via a Catalyst-Free Depolymerization Approach

2021 ◽  
Author(s):  
Hyun Suk Wang ◽  
Nghia P. Truong ◽  
Athina Anastasaki
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
Controlled Radical Polymerization ◽  
Catalyst Free ◽  
Reversible Addition ◽  
Fundamental Research ◽  
New Applications ◽  
Raft Polymers ◽  
Glycol Methyl Ether ◽  
End Group

The ability to reverse controlled radical polymerization and regenerate the monomer would be highly beneficial for both fundamental research and applications, yet has remained very challenging to achieve. Herein, we report a near-quantitative (up to 92%) and catalyst-free depolymerization of various linear, bulky, crosslinked, and functional polymethacrylates made by reversible addition-fragmentation chain-transfer (RAFT) polymerization. Key to our approach is to exploit the high end-group fidelity of RAFT polymers to generate chain-end radicals via thermal homolytic cleavage of carbon-sulfur bond of the RAFT end-group at 120 °C. These radicals trigger a rapid unzipping of both conventional (e.g. poly(methyl methacrylate)) and bulky polymers (e.g. poly(oligo(ethylene glycol) methyl ether methacrylate) (POEGMA)). Importantly, the depolymerization product can be utilized to either reconstruct the linear polymer or create an entirely new insoluble gel that can also be subjected to depolymerization. This work expands the potential of polymers made by CRP, pushes the boundaries of depolymerization, offers intriguing mechanistic aspects, and enables new applications.

Organic Photocatalyst for ppm-Level Visible-Light-Driven Reversible Addition–Fragmentation Chain-Transfer (RAFT) Polymerization with Excellent Oxygen Tolerance

2019 ◽  
Vol 52 (15) ◽  
pp. 5538-5545 ◽  
Author(s):  
Yuna Song ◽  
Youngmu Kim ◽  
Yeonjin Noh ◽  
Varun Kumar Singh ◽  
Santosh Kumar Behera ◽  
...  
Keyword(s):  
Visible Light ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Oxygen Tolerance ◽  
Reversible Addition ◽  
Visible Light Driven ◽  
Ppm Level

Visible light induced aqueous RAFT polymerization using a supramolecular perylene diimide/cucurbit[7]uril complex

2019 ◽  
Vol 10 (22) ◽  
pp. 2801-2811 ◽  
Author(s):  
Yongqi Yang ◽  
Zesheng An
Keyword(s):  
Visible Light ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Green Light ◽  
Water Soluble ◽  
Perylene Diimide ◽  
Metal Free ◽  
Reversible Addition

A water-soluble perylene diimide (PDI), in the presence of triethanolamine (TEOA), is used as a metal-free photocatalyst for aqueous reversible addition–fragmentation chain transfer (RAFT) polymerization under green light.

Controlled radical polymerization of vinyl ketones using visible light

2017 ◽  
Vol 8 (21) ◽  
pp. 3351-3356 ◽  
Author(s):  
In-Hwan Lee ◽  
Emre H. Discekici ◽  
Athina Anastasaki ◽  
Javier Read de Alaniz ◽  
Craig J. Hawker
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Radical Polymerization ◽  
Photoinduced Electron Transfer ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Controlled Radical Polymerization ◽  
Eosin Y ◽  
Methyl Ethyl ◽  
Reversible Addition

Herein we report the photoinduced electron transfer–reversible addition–fragmentation chain transfer (PET-RAFT) polymerization of a range of vinyl ketone monomers including methyl, ethyl and phenyl derivatives, using Eosin Y as an organic photoredox catalyst and visible light.

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