Visible Light Anthraquinone Functional Phthalocyanine Photoinitiator for Free-Radical and Cationic Polymerizations


Breloy L., Brezova V., Blacha-Grzechnik A., Presset M., Yıldırım M. S. , Yılmaz İ. , ...More

MACROMOLECULES, vol.53, no.1, pp.112-124, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 1
  • Publication Date: 2020
  • Doi Number: 10.1021/acs.macromol.9b01630
  • Title of Journal : MACROMOLECULES
  • Page Numbers: pp.112-124

Abstract

We report for the first time the synthesis and use of a visible light-sensitive anthraquinone functional phthalocyanine (AQ-ZnPc) in combination with a suitable electron donor (methyldiethanol amine, MDEA), electron acceptor (iodonium salt), or H-donor (thiol derivative, trithiol) as photoinitiating systems for the free-radical and cationic photopolymerization. These unprecedented combinations for the FRP and CP under visible light irradiation promoted high acrylate and epoxy conversions with efficiency comparable to well-known camphorquinone-based photoinitiating systems. As evidenced by electron paramagnetic resonance and laser flash photolysis experiments, AQ-ZnPc acts either as an electron donor via a photoinduced electron transfer pathway with iodonium salt or as a proton/proton-coupled electron transfer promoter when combined with MDEA or a thiol derivative. Moreover, AQ-ZnPc was shown to be very active as a singlet oxygen promoter when introduced in an interpenetrated polymer network for preventing the adhesion and proliferation of bacteria under visible light activation.