Difunctional 1H-quinolin-2-ones as spectroscopic fluorescent probes for real-time monitoring of photopolymerisation process and photosensitizers of fluorescent photopolymer resin in 3D printing

Herein, novel 1H-quinolin-2-ones derivatives dedicated to polymer chemistry have been reported. Essential spectroscopic studies including absorbance, fluorescence emission and excitation spectra were carried out. Subsequently, a number of studies on the suitability of new compounds for the role of fluorescent molecular probes using Fluorescence Probe Technology were performed. The research present also the suitability of these compounds as co-initiators in a two-component system: 1H-quinolin-2-ones/4,4 '-dimethyl-diphenyl iodonium hexafluorophosphate (OMNICAT 440). Cationic photopolymerisation processes of CADE epoxy and vinyl TEGDVE monomers, free-radical photopolymerisation of TMPTA acrylic monomer as well as thiol-ene photopolymerisation of a mixture of monomers: TATATO/MERCAPTO when exposed to UV light with maximum emission at 365 nm and visible light with maximum emission at 405 nm were carried out. Finally, the applicability of novel initiating systems to obtain fluorescent 3D prints was introduced.

Automated summary

This study presents the synthesis of novel 1H-quinolin-2-ones derivatives dedicated to polymer chemistry, exploring their role as fluorescent molecular probes and co-initiators in polymerization. Different photopolymerization reactions were conducted to demonstrate the applicability of these compounds, with a focus on obtaining fluorescent 3D prints.