Metal-Free ATRP Catalyzed by Visible Light in Continuous Flow

ATRP of methyl methacrylate catalyzed by Eosin Y, an inexpensive and an environmental benign dye, was performed in a continuous flow reactor made of FEP tubing and irradiated by visible light green LEDs. The reaction under flow conditions was significantly more rapid and controlled compared to that...

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Bibliographic Details
Published in:Frontiers in chemistry 2020-09, Vol.8, p.740-740
Main Authors: El Achi, Nassim, Bakkour, Youssef, Adhami, Wissal, Molina, Julien, Penhoat, Maël, Azaroual, Nathalie, Chausset-Boissarie, Laëtitia, Rolando, Christian
Format: Article
Language:English
Subjects:
ATRP
Chemical Sciences
Chemistry
continuous flow
DOSY NMR
Eosin Y
Organic chemistry
visible light
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Summary:ATRP of methyl methacrylate catalyzed by Eosin Y, an inexpensive and an environmental benign dye, was performed in a continuous flow reactor made of FEP tubing and irradiated by visible light green LEDs. The reaction under flow conditions was significantly more rapid and controlled compared to that in batch giving 90% of polymerization after only 3 h of irradiation. The formed polymers in flow have M n measured by GPC and DOSY NMR in accordance with the theoretical values and show low dispersities (Ð < 1.5). The livingness of the polymers has been confirmed by LED on and LED off experiments and by the synthesis of block copolymers. The protocol described herein serves as a "proof of concept" of using Eosin Y as a photocatalyst for controlled polymerization and of using 1D and 2D NMR for polymer characterization. The protocol could be replicated in the future for other reversible-deactivation radical polymerizations.
ISSN:2296-2646
2296-2646
DOI:10.3389/fchem.2020.00740