Products Cited in Publications Worldwide Visible Light-ATRP Driven by Tris(2-Pyridylmethyl)Amine (TPMA) Impurities in the Open Air

Visible Light-ATRP Driven by Tris(2-Pyridylmethyl)Amine (TPMA) Impurities in the Open Air

Jazani, Arman Moini; Schild, Dirk J.; Sobieski, Julian; Hu, Xiaolei; Matyjaszewski, Krzysztof

DOI: PMID:

Abstract

Atom transfer radical polymerization (ATRP) of oligo(ethylene oxide) monomethyl ether methacrylate (OEOMA500) in H2O is enabled using CuBr2 with tris(2-pyridylmethyl)amine (TPMA) as a ligand under blue or green-light irradiation without requiring any addnl. reagent, such as a photo-reductant, or the need for prior deoxygenation. Polymers with low dispersity (D = 1.18-1.25) are synthesized at high conversion (>95%) using TPMA from 3 different suppliers, while no polymerization occurred with TPMA synthesized and purified in the laboratory Based on spectroscopic studies, probably TPMA impurities (i.e., imine and nitrone dipyridine), which absorb blue and green light, can act as photosensitive co-catalyst(s) in a light region where neither pure TPMA nor [(TPMA)CuBr]+ absorbs light.

Keywords

ATRP ; green light ; oxygen tolerance ; water

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A30739316858-01-897%

Tris(2-pyridylmethyl)amine

36.0/5g

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