Affiliation:
1. Center for Soft Condensed Matter Physics and Interdisciplinary Research & Jiangsu Key Laboratory of Frontier Material Physics and Devices School of Physical Science and Technology Soochow University Suzhou 215006 P. R. China
2. Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis College of Chemistry Engineering and Materials Science of Soochow University Suzhou 215123 China
Abstract
AbstractLight irradiation is an external stimulus, rapidly developed in switchable atom transfer radical polymerization (ATRP) via photo‐activation methods in recent years. Herein, a photo‐deactivation strategy is introduced to regulate ATRP with the assistance of photoswitchable hexaarylbiimidozole (HABI). Under visible light irradiation and in the presence of HABI, ATRP is greatly decelerated or quenched depending on the concentration of HABI. Interestingly, with visible light off, ATRP can proceed smoothly and follow a first‐order kinetics. Moreover, photo‐switchable ATRP alternatively with light off and on is demonstrated. Besides, the mechanism of photo‐deactivation ATRP involving radical quenching is proposed in the presence of HABI.
Funder
National Natural Science Foundation of China