Tertiary amine catalyzed photo-induced controlled radical polymerization of methacrylates

Fu, Qiang; McKenzie, Thomas G.; Tan, Shereen; Nam, Eunhyung; Qiao, Greg G.

doi:10.1039/c5py00840a

Cited by 67 publications

(82 citation statements)

References 38 publications

(66 reference statements)

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“…Recently, this technique has received a new direction for photo‐RCMP as various amino‐based catalysts were able to activate the alkyl iodide dormant species over a huge range of irradiation wavelengths (350–750 nm) and to mediate the polymerization of methacrylates (Scheme ) . In addition, tertiary amines can act as photoredox catalysts in RAFT processes under mild UV irradiation …”

Section: Photocatalysts (Pcs) In Controlled Radical Photopolymerizatmentioning

confidence: 99%

Photocatalysts in Polymerization Reactions

et al. 2016

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International audienceA short review on the role of photocatalysts in photopolymerization reactions is presented. A special emphasis is done on photoredox catalysts leading to i) high performance initiating systems for polymerization upon low light intensity for the use of light emitting diodes (LEDs) and/or visible light or ii) Controlled Radical PhotoPolymerization (CRP2) processes with formation/reactivation of dormant species triggered by light

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Section: Photocatalysts (Pcs) In Controlled Radical Photopolymerizatmentioning

confidence: 99%

Photocatalysts in Polymerization Reactions

et al. 2016

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“…RDRPs act by minimizing the time the chain end spends in its 'active' (i.e. Many examples of photochemically-mediated RDRP variants have emerged, including photo-ATRP, [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] photo-NMP, 30 and photo-RAFT (both photoinitiated [31][32][33][34][35][36][37][38] and photo-catalysed [39][40][41][42][43][44][45][46][47] ) with much success. 12 This can be achieved through two fundamental mechanisms: (1) the reversible activation/deactivation end-capping from a dormant to active state, and (2) a degenerative chain transfer mechanism.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the photolytic stability of RAFT agents and the implications for photopolymerization reactions

et al. 2016

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The photolytic stability of various RAFT agents (i.e., thiocarbonylthio-containing compounds) under irradiation from a blue LED light source has been investigated. The effect and implications of efficient photo-fragmentation and potential photo-degradation with regard to their performance in photopolymerization reactions is reported. The stability is found to depend strongly on the structure of the fragmenting (R-) group and the reactivity of the carbon-centered radical formed following photolytic cleavage. This is proposed to be due to the competitive rates of radical recombination and thiyl radical degradation, and has implications on the choice of monomer (as monomer propagation requires reinitiation of the oligomeric/polymeric RAFT agent). These findings can provide guidelines and increase understanding when conducting a photopolymerization employing thiocarbonylthio RAFT agents. † Electronic supplementary information (ESI) available: Materials and characterization details. Experimental procedures and supplementary figures. See

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“…An alternative approach to photochemical RAFT polymerization uses the thiocarbonylthio RAFT group as the chromophore, either with or without an added electron donor . When an electron donor (such as an amine) is added, the mechanism resembles an ATRP reaction, although the amine donor acts as an activator for the excited state RAFT end group.…”

Section: Mechanistic Considerations In Photochemically Driven Raftmentioning

confidence: 99%

Photochemistry for Well‐Defined Polymers in Aqueous Media: From Fundamentals to Polymer Nanoparticles to Bioconjugates

Burridge

Wright

Page

et al. 2018

Macromol. Rapid Commun.

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This review article highlights recent developments in the field of photochemistry and photochemical reversible deactivation radical polymerization applied to aqueous polymerizations. Photochemistry is a topic of significant interest in the fields of organic, polymer, and materials chemistry because it allows challenging reactions to be performed under mild conditions. Aqueous polymerization is of significant interest because water is an environmentally benign solvent, and the use of water enables complex polymer self-assembly and bioconjugation processes to occur. This review focuses on powerful new developments in photochemical aqueous polymerization reactions and their applications to the synthesis of well-defined polymer nano-objects and bioconjugates. It is anticipated that these aqueous photopolymerizations will enable the next generation of self-assembled structures and biohybrid materials to be developed under mild and environmentally friendly conditions.

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Tertiary amine catalyzed photo-induced controlled radical polymerization of methacrylates

Cited by 67 publications

References 38 publications

Photocatalysts in Polymerization Reactions

Photocatalysts in Polymerization Reactions

Investigation into the photolytic stability of RAFT agents and the implications for photopolymerization reactions

Photochemistry for Well‐Defined Polymers in Aqueous Media: From Fundamentals to Polymer Nanoparticles to Bioconjugates

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