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Issue 41, 2020
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Iodine-mediated photo-controlled atom transfer radical polymerization (photo-ATRP) and block polymerization combined with ring-opening polymerization (ROP) via a superbase

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Abstract

Most organocatalysts for photo-controlled atom transfer radical polymerization (photo-ATRP) are metal complexes or synthetically elaborate organic dyes, which are toxic and expensive. Herein, we present a combination of 1,1,3,3-tetramethylguanidine (TMG) and sodium iodide (NaI) under white LED irradiation that could catalyze iodine-mediated photo-ATRP. Using a dual initiator and combining with ring-opening polymerization (ROP), well-defined poly(methacrylate)-b-polyester diblock copolymers can be successfully prepared in “one-pot” using a TMG/NaI photoredox catalytic system. Moreover, several superbases such as 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD), 1,8-diazabicyclo [5.4.0]-undec-7-ene (DBU) and a phosphazene superbase (t-Bu-P4) could also be employed with NaI to serve as photoredox catalysts for this polymerization system and block copolymers could be synthesized in “one-pot”.

Graphical abstract: Iodine-mediated photo-controlled atom transfer radical polymerization (photo-ATRP) and block polymerization combined with ring-opening polymerization (ROP) via a superbase

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Article information


Submitted
20 Jul 2020
Accepted
18 Sep 2020
First published
21 Sep 2020

Polym. Chem., 2020,11, 6591-6598
Article type
Paper

Iodine-mediated photo-controlled atom transfer radical polymerization (photo-ATRP) and block polymerization combined with ring-opening polymerization (ROP) via a superbase

M. Li, S. Wang, F. Li, L. Zhou and L. Lei, Polym. Chem., 2020, 11, 6591
DOI: 10.1039/D0PY01031F

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