Tetra-3-[(2-diethylamino)ethyl]-7-oxo-4-methylcoumarin-substituted zinc phthalocyanines: Synthesis, characterization and aggregation effects on photophysical/photochemical properties

Esenpinar A. A., DURMUŞ M., Bulut M.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, vol.213, pp.171-179, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 213
  • Publication Date: 2010
  • Doi Number: 10.1016/j.jphotochem.2010.05.021
  • Journal Name: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.171-179
  • Keywords: Coumarin (2H-chromen-2-one), Fluorescence, Phthalocyanine, Quantum yield, Singlet oxygen, Zinc, PHOTOCHEMICAL PROPERTIES, PHOTOPHYSICAL PROPERTIES, PECHMANN REACTION, QUANTUM YIELDS, PHOTOSENSITIZERS, SUBSTITUENTS, DERIVATIVES, SEPARATION, COMPLEXES, COUMARINS
  • Marmara University Affiliated: Yes

Abstract

A synthesis of a novel zinc phthalocyanine with four 3-[(2-diethylamino)ethyl]-7-oxo-4-methylcoumarin dye groups at the non-peripheral positions was performed and characterized. The photophysical and photochemical properties of the peripherally (p) and non-peripherally (np) tetra-3[(2-diethylamino)ethyl]-7-oxo-4-methylcoumarin substituted zinc (II) phthalocyanines are reported. The effects of the position of the substituents and the aggregation on the photophysical/photochemical properties of these complexes are also investigated. General trends are described for photodegredation, singlet oxygen and fluorescence quantum yields, and fluorescence lifetimes in dimethylsulphoxide (DMSO) for np-ZnPc and in both DMSO and DMSO+Triton-X 100 solutions for p-ZnPc. The fluorescence of the tetra-substituted zinc phthalocyanine complexes (np-ZnPc and p-ZnPc) are effectively quenched addition of 1,4-benzoquinone (BQ). (C) 2010 Elsevier B.V. All rights reserved.