Type II photoinitiator substituted zinc phthalocyanine: Synthesis, photophysical and photopolymerization studies


KORKUT S. , Temel G., Balta D. , ARSU N. , ŞENER M. K.

JOURNAL OF LUMINESCENCE, vol.136, pp.389-394, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 136
  • Publication Date: 2013
  • Doi Number: 10.1016/j.jlumin.2012.12.025
  • Title of Journal : JOURNAL OF LUMINESCENCE
  • Page Numbers: pp.389-394
  • Keywords: Phthalocyanine, Thioxanthone, Photopolymerization, Type II photoinitiator, Fluorescence, THIOXANTHONE, POLYMERIZATION, DERIVATIVES, COMPLEXES

Abstract

The novel 4-(9-oxo-9 H-thioxanthen-2yloxy) phthalonitrile (TX-Pht) and its peripherally tetra substituted zinc phthalocyanine complex (TX-ZnPc) have been prepared and characterized by spectroscopic and elemental analysis techniques. Photoinitiated polymerization of methyl methacrylate (MMA) with TX-ZnPc has been investigated in the presence and absence of a co-initiator. Fluorescence and phosphorescence measurements have been also performed to determine the photophysical properties. Low fluorescence quantum yield (Phi(F)=0.08) compared to the unsubstituted ZnPc has been found. This allows initiator to undergo intersystem crossing into the triplet state and the lowest triplet state possesses pi-pi* configuration. (C) 2012 Elsevier B.V. All rights reserved.