Disubstituted Aminoanthraquinone-Based Multicolor Photoinitiators: Photoinitiation Mechanism and Ability of Cationic Polymerization under Blue, Green, Yellow, and Red LEDs

J. Zhang, J. Lalevée, N. S. Hill, K. Launay, F. Morlet-Savary, B. Graff, M. H. Stenzel, M. L. Coote, P. Xiao

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The investigation and clarification of the photoinitiation mechanism of novel systems are of importance for the design and development of compounds with high photoinitiation efficiency of photopolymerization. Some disubstituted aminoanthraquinone derivatives have been reported to exhibit interesting photochemical/photophysical properties and have the potential to act as high performance multicolor photoinitiators under the irradiation of various wavelengths of visible light from light-emitting diodes (LEDs). Herein, three disubstituted aminoanthraquinone derivatives, i.e., 1-amino-4-hydroxyanthraquinone, 1,4-diaminoanthraquinone, and 1,5-diaminoanthraquinone, with iodonium salt and N-vinylcarbazole as additives, have been investigated. Their photoinitiation mechanism was studied using fluorescence spectroscopy, laser flash photolysis, steady state photolysis, computational quantum chemistry, and electron spin resonance spin trapping techniques. Then, their photoinitiation ability for the cationic photopolymerization of epoxide and divinyl ether monomers under the irradiation of diverse LEDs (i.e., blue, green, yellow, and red LEDs) was investigated. The types and positions of substituents were found to play a vital role in the photoreactivity and photoinitiation ability of the disubstituted aminoanthraquinone derivative-based photoinitiating systems.

Original languageEnglish
Pages (from-to)8165-8173
Number of pages9
JournalMacromolecules
Volume51
Issue number20
DOIs
Publication statusPublished - 23 Oct 2018
Externally publishedYes

Keywords

  • Charge transfer
  • Photopolymerization
  • Light absorption
  • Diodes
  • Irradiation

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