Visible‐Light‐Mediated Controlled Radical Branching Polymerization in Water

Author:

Kapil Kriti1,Szczepaniak Grzegorz12,Martinez Michael R.1,Murata Hironobu1,Jazani Arman Moini1,Jeong Jaepil1,Das Subha R.13,Matyjaszewski Krzysztof1ORCID

Affiliation:

1. Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA

2. Faculty of Chemistry University of Warsaw Pasteura 1 02-093 Warsaw Poland

3. Center for Nucleic Acids Science & Technology Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA

Abstract

AbstractHyperbranched polymethacrylates were synthesized by green‐light‐induced atom transfer radical polymerization (ATRP) under biologically relevant conditions in the open air. Sodium 2‐bromoacrylate (SBA) was prepared in situ from commercially available 2‐bromoacrylic acid and used as a water‐soluble inibramer to induce branching during the copolymerization of methacrylate monomers. As a result, well‐defined branched polymethacrylates were obtained in less than 30 min with predetermined molecular weights (36 000<Mn<170 000), tunable degree of branching, and low dispersity values (1.14≤Đ≤1.33). Moreover, the use of SBA inibramer enabled the synthesis of bioconjugates with a well‐controlled branched architecture.

Funder

Division of Materials Research

U.S. Department of Defense

Publisher

Wiley

Subject

General Chemistry,Catalysis

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