NDLI: Copper photoredox catalysts for polymerization upon near UV or visible light: structure/reactivity/efficiency relationships and use in LED projector 3D printing resins

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Copper photoredox catalysts for polymerization upon near UV or visible light: structure/reactivity/efficiency relationships and use in LED projector 3D printing resins

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Polymer Chemistry Vol - 8 Issue - 2

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Copper photoredox catalysts for polymerization upon near UV or visible light: structure/reactivity/efficiency relationships and use in LED projector 3D printing resins

Content Provider	Royal Society of Chemistry (RSC)
Author	Graff, Bernadette Kermagoret, Anthony Mousawi, Assi Al Hamieh, Tayssir Fouassier, Jean Pierre Dumur, Frederic Toufaily, Joumana Gigmes, Didier Lalevée, Jacques Versace, Davy-Louis
Copyright Year	2017
Abstract	Copper complexes (CuCs) bearing pyridine–pyrazole ligands are synthesized and evaluated as new photoredox catalysts/photoinitiators in combination with an iodonium salt (Iod) for the free radical polymerization of (meth)acrylates and the cationic polymerization of epoxides upon visible light exposure using a Light Emitting Diode (LED)@405 nm. The structure/reactivity/efficiency relationships for the copper complexes are studied as well as the chemical mechanisms involved. The different substituents on the pyrazole moiety of the ligand allow tuning of the oxidation potential and the visible light absorbance of the complexes and to optimize the performance of the polymerization photoredox catalysts. The use of a novel additive (CARET) in a three-component system (CuC/Iod/CARET) highly improves the performance. Finally, the high performances of the Cu(I) complexes for the development of new 3D printing resins using an LED projector are demonstrated. Currently, LED projector printing is really advantageous in 3D printing i.e. this technology projects the profile of an entire layer at one time.
Starting Page	568
Ending Page	580
Page Count	13
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	8
Issue Number	3
Journal	Polymer Chemistry
DOI	10.1039/c6py01958g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ligand Radical polymerization Polymerization Cationic polymerization Copper Pyrazole 3D printing
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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