Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and three dimensional printing was written by Xu, Yangyang;Noirbent, Guillaume;Brunel, Damien;Ding, Zhaofu;Gigmes, Didier;Graff, Bernadette;Xiao, Pu;Dumur, Frederic;Lalevee, Jacques. And the article was included in Dyes and Pigments in 2021.Category: piperidines This article mentions the following:
Five ketone derivatives (ketone-1-ketone-5) never synthesized in the literature and containing the same peripheral 1,3-bis(allyloxy)benzene substituting group but different central cyclohexanone cores were designed and proposed as high-performance photoinitiators for the free radical polymerization of acrylates under mild conditions. In combination with an amine and an iodonium salt (Iod), these ketones could initiate the photopolymerization of di(trimethylolpropane) tetraacrylate (TA), a tetrafunctional acrylates monomer, upon visible LED irradiation at room temperature in both thick films (1.4 mm) and thin films (25渭m) conditions. The distinct photopolymerization profiles of acrylates were studied by real time fourier transform IR spectroscopy, which indicated that the ketone-2/amine/Iod system could induce the highest final conversion of acrylates in thick films condition, while ketone-5/amine/Iod system could induce the highest final conversion of acrylates in thin films condition. Photoreactivity of ketone-2 and ketone-5 was systematically investigated by steady state photolysis and fluorescence quenching experiments in the presence of an amine and an iodonium salt, resp. Moreover, eminent migration stability of ketones in photocured TA was observed Finally, the ketone-2 and ketone-5-based three-component photoinitiating systems were applied for the laser writing experiments of TA, and macroscopically tridimensional patterns were fabricated with an excellent spatial resolution In the experiment, the researchers used many compounds, for example, 1-Ethylpiperidin-4-one (cas: 3612-18-8Category: piperidines).
1-Ethylpiperidin-4-one (cas: 3612-18-8) belongs to piperidine derivatives. The piperidine moiety constitutes an important building block for the synthesis of a variety of bioactive natural products, alkaloids and other drugs. Piperidine prefers a chair conformation, similar to cyclohexane. Unlike cyclohexane, piperidine has two distinguishable chair conformations: one with the N鈥揌 bond in an axial position, and the other in an equatorial position.Category: piperidines
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem