Design of photoinitiating systems based on the chalcone-anthracene scaffold for LED cationic photopolymerization and application in 3D printing

In this study, light-emitting diodes (LEDs) used as secure, low-cost and possessing long emission wavelengths irradiation sources were applied in photopolymerization. Seven novel anthracene derivatives (noted A1-A7) proposed evaluated photosensitive systems. Three of them never synthesized before (A1, A2 A7) the other fields. Due to in-silico design molecular structure by modeling, chalcone-anthracenes showed a broad absorption band visible region with favorable molar extinction coefficients. Photoinitiation abilities different photoinitiating systems examined Real-Time Fourier Transformed Infrared Spectroscopy. The free radical polymerization acrylates under [email protected] nm laminate was high final function conversions (FCs) obtained presence three-component based on chalcone-anthracenes/iodonium salt/amine. Meanwhile, chalcone-anthracene exhibited photoinitiation cationic photopolymerization epoxides combination an iodonium salt irradiation. epoxy using some anthracene/iodonium even higher than well-established dibutoxyanthracene (DBA)/iodonium benchmark system. addition, due good light properties, also carried out chalcone-anthracene/iodonium or laser (not possible do reference DBA systems). Markedly, these able sensitize sulfonium salts. photochemical reactivity investigated through steady state photolysis fluorescence quenching experiments. Furthermore, interaction mechanisms additives (iodonium amine) discussed energy changes electron transfer reactions. Interestingly, A5/iodonium system 3D printing patterns spatial resolution.