1 research outputs found
Coumarin-Based Oxime Esters: Photobleachable and Versatile Unimolecular Initiators for Acrylate and Thiol-Based Click Photopolymerization under Visible Light-Emitting Diode Light Irradiation
Developing
efficient unimolecular visible light-emitting diode (LED) light photoinitiators
(PIs) with photobleaching capability, which are essential for various
biomedical applications and photopolymerization of thick materials,
remains a great challenge. Herein, we demonstrate the synthesis of
a series of novel PIs, containing coumarin moieties as chromophores
and oxime ester groups as initiation functionalities and explore their
structure–activity relationship. The investigated oxime esters
can effectively induce acrylates and thiol-based click photopolymerization
under 450 nm visible LED light irradiation. The initiator <b>O-3</b> exhibited excellent photobleaching capability and enabled photopolymerization
of thick materials (∼4.8 mm). The efficient unimolecular photobleachable
initiators show great potential in dental materials and 3D printings