Multicomponent photoinitiating systems containing arylamino oxime ester for visible light photopolymerization

Novel phenylamine‐based oxime ester photoinitiators for LED‐induced free radical, cationic, and hybrid polymerization

“…21,25 Recently, several research studies have elegantly reported the significant photopolymerization ability of different OXE's under visible light. [26][27][28][29] Different chromophores were introduced for red-shifting their absorption wavelength for better matching with different LED light sources. In the present paper, never reported OXE's derivatives were synthesized and proposed as highperformance PIS's.…”

Conjugated Bifunctional Carbazole‐Based Oxime Esters: Efficient and Versatile Photoinitiators for 3D Printing under One‐ and Two‐Photon Excitation

“…The followed photodecarboxylation can suppress recoupling of the generated free radicals and the released CO 2 might reduce oxygen inhibition . Wang et al., reported a series of phenothiazine‐substituted oxime esters as photocleavable PIs sensitive to 405 nm laser diodes . Our recent work has proven that when integrating the oxime‐ester moiety into a visible light sensitive coumarin skeleton, the N−O bond can be cleaved under 450 nm LED light irradiation or even under 980 nm near infrared laser excitation with assistance of upconversion nanoparticles .…”

“…[22] Wang et al, reported a series of phenothiazine-substituted oxime esters as photocleavable PIs sensitive to 405 nm laser diodes. [23,24] Our recent work has proven that when integrating the oxime-ester moiety into a visible light sensitive coumarin skeleton, the NÀ O bond can be cleaved under 450 nm LED light irradiation [25,26] or even under 980 nm near infrared laser excitation with assistance of upconversion nanoparticles. [27] It should be noted that these asymmetric oxime-esters can produce only one active initiation species after photolysis because the initiation ability of the generated primary iminyl radicals is limited.…”

Benzophenone derivatives as novel organosoluble visible light Type II photoinitiators for UV and LED photoinitiating systems

“…First, α-Cleavage type (Type I photoinitiator) also called onecomponent photoinitiator, involving direct cleavage under light irradiation to produce initiating radicals. [19,20] Second, hydrogen abstraction type (Type II photoinitiator) also called two-component photoinitiator, involving generation of radicals by hydrogen acceptor and electron/proton transfer processes from hydrogen acceptor to hydrogen donor co-initiator. [21] Among various Type II photoinitiators, benzophenone (BP) is the most widely used hydrogen abstracting compound in short wavelength UV.…”