Photo-Deactivation Strategy for Switchable ATRP with the Assistance of Molecular Switches.
Macromol Rapid Commun
; 45(15): e2400162, 2024 Aug.
Article
de En
| MEDLINE
| ID: mdl-38719215
ABSTRACT
Light 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.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Processus photochimiques
/
Polymérisation
/
Lumière
Langue:
En
Journal:
Macromol Rapid Commun
Année:
2024
Type de document:
Article
Pays de publication:
Allemagne