Synthesis, photophysical and photochemical properties of novel soluble tetra[4-(thiophen-3yl)-phenoxy]phthalocyaninato zinc(II) and Ti(IV)O complexes


Erdogmus A. , Nyokong T.

INORGANICA CHIMICA ACTA, vol.362, no.14, pp.4875-4883, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 362 Issue: 14
  • Publication Date: 2009
  • Doi Number: 10.1016/j.ica.2009.07.015
  • Title of Journal : INORGANICA CHIMICA ACTA
  • Page Numbers: pp.4875-4883
  • Keywords: Oxo-titanium and zinc phthalocyanines, Triplet quantum yield, Fluorescence quantum yield, Singlet oxygen, Photodynamic therapy, METAL-COMPLEXES, SINGLET OXYGEN, QUANTUM YIELDS, PHTHALOCYANINES, ELECTROCHEMISTRY

Abstract

The synthesis, photophysical and photochemical properties of zinc and oxo-titanium phthalocyanine derivatives 4-(tetra[4-(thiophen-3yl)-phenoxy]phthalocyaninato)zinc(II), (2); and 4-(tetra[4-(thiophen3yl)-phenoxy] phthalocyaninato)oxo-titanium(IV), (3), are described for the first time. These peripherally substituted complexes (2 and 3) have been synthesized and characterized by elemental analysis, IR, H-1 NMR and electronic spectroscopy. The compounds (2 and 3) have good solubility in organic solvents such as CHCl3, DCM, DMSO, DMF, THF and toluene and are not aggregated within a wide concentration range. General trends are described for singlet oxygen, photodegradation,fluorescence quantum yields, triplet quantum yields and triplet life times of these complexes in DMSO, DMF and THF. Compound 2 has higher fluorescence quantum yields, triplet quantum yields and triplet life times than 3, however, the former has lower singlet oxygen quantum yields and photodegradation quantum yields than the latter. (c) 2009 Elsevier B.V. All rights reserved.