Thioxanthone-Diphenyl Anthracene: Visible Light Photoinitiator


Balta D. , TEMEL G., Goksu G. , OCAL N. , ARSU N.

MACROMOLECULES, vol.45, no.1, pp.119-125, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 45 Issue: 1
  • Publication Date: 2012
  • Doi Number: 10.1021/ma202168m
  • Title of Journal : MACROMOLECULES
  • Page Numbers: pp.119-125

Abstract

7,12-Diphenyl-14H-naphto[2,3-b]thioxanthen-14-one (TX-DPA) was synthesized and characterized as a potential visible light photoinitiator for radical polymerization. TX-DPA has an excellent absorption character in the visible region and the photophysical properties of TX-DPA were investigated by fluorescence and laser flash photolysis studies and the photopolymerization of methyl methacrylate in air atmosphere helped to understand the initiation mechanism of TX-DPA. Moreover, it is possible that the production of singlet oxygen from the quenching of (3)TX-DPA by molecular oxygen resulted in the reaction of singlet oxygen with TX-DPA to form an endopercaide: decomposition of endoperoxide leads to initiating radicals.