The synthesis of novel,visible-wavelength oxidizable polymerization sensitizers based on the 5,12-dihydroquinoxalino[2,3-b]pyridopyrazine skeleton |
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| Authors: | Rados?aw Podsiad?y |
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| Affiliation: | 1. Institute of Materials Science and Engineering, Lodz University of Technology, Stefanowskiego 1/15, 90-924 ?ód?, Poland;2. Faculty of Materials Science and Engineering, Warsaw University of Technology, Wo?oska 141, 02-507 Warsaw, Poland;3. Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland;4. Military University of Technology, Faculty of Mechanical Engineering, Department of Mechanics and Computer Science, S. Kaliskiego 2, 00-908 Warsaw, Poland;5. Department of Molecular Physics, Lodz University of Technology, Stefanowskiego 1/15, 90-924 ?ód?, Poland |
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| Abstract: | Novel dyes based on the 5,12-dihydroquinoxalino2,3-b]pyridopyrazine skeleton were synthesized and subsequently characterized using 1H NMR. Their electrochemical and spectral properties, such as absorption and emission spectra, quantum yield of fluorescence, and quantum yield of singlet oxygen generation, were also measured. The dyes were useful as photoinitiators for sensitizing compounds to photooxidation. Photoredox pairs comprising dyes and onium salts were found to be effective visible-wavelength initiators of free radical or cationic polymerization. |
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