Thioxanthone-ethyl anthracene

Balta D., ARSU N.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, vol.257, pp.54-59, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 257
  • Publication Date: 2013
  • Doi Number: 10.1016/j.jphotochem.2013.02.014
  • Journal Name: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.54-59
  • Keywords: Photopolymerization, Photoinitiator, Thioxanthone, FREE-RADICAL POLYMERIZATION, DOUBLE CLICK REACTIONS, CHAIN THIOXANTHONE, PHOTOINITIATOR, PHOTOPOLYMERIZATION, FLUORESCENCE, BENZOPHENONE, CHEMISTRY, INITIATOR, AMINE
  • Yıldız Technical University Affiliated: Yes

Abstract

Thioxanthone-2-ethyl anthracene (TX-EA) was synthesized and characterized as part of our continuing interest in synthesizing polyaromatic initiators which have good absorption properties in the UV and visible region of the electromagnetic spectrum (epsilon(329): 28,746 M-1 cm(-1), epsilon(430):5028 M-1 cm(-1)). The fluorescence quantum yield was calculated as 0.025 which is slightly lower than that of the parent thioxanthone compound (phi(f): 0.07). The triplet lifetime was found to be 3.9 mu s from laser flash photolysis studies. The initiating efficiency of TX-EA was found to be highly efficient for mono and multifunctional acrylates from the results obtained from the solution polymerization and photo-DSC in the presence and absence of MDEA in air atmosphere. (C) 2013 Elsevier B.V. All rights reserved.