Dibenzophenazine Derivatives as Visible Photosensitizers for Diaryliodonium Salts

Bulut U., Kolay M., Tarkuc S., Toppare L.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.49, no.15, pp.3299-3303, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 49 Issue: 15
  • Publication Date: 2011
  • Doi Number: 10.1002/pola.24766
  • Journal Name: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3299-3303
  • Keywords: cationic polymerization, diaryliodonium salts, dibenzophenazine derivatives, photopolymerization, photosensitization, ring-opening polymerization, PHOTOINITIATED CATIONIC-POLYMERIZATION, LONG-WAVELENGTH PHOTOSENSITIZER, PHOTOPOLYMERIZATION REACTIONS, TRIARYLSULFONIUM SALTS, SYSTEM, LIGHT, MONOMERS, ELECTRON
  • Middle East Technical University Affiliated: Yes

Abstract

The use of two dibenzo[a,c]phenazine derivatives, 10,13-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)dibenzo[a,c]phenazine and 10,13-bis(4-hexylthiophen-2-yl)dibenzo[a,c]phenazine are reported as photosensitizers for diaryliodonium salt photoinitiators. Novel dyes based on the dibenzo[a,c]phenazine skeleton are shown to be efficient in carrying out the cationic photopolymerizations. Representative examples of different types of monomers including epoxide, and vinyl monomers are polymerized in the presence of the photosensitizers and diphenyliodonium hexafluorophosphate (Ph2I+PF6-). Polymerizations are initiated at room temperature using long wavelength UV and visible light, and monitored by optical pyrometry. The photopolymerization of an epoxide monomer via solar irradiation is also demonstrated. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 32993303, 2011