Photophysical and photochemical properties of novel phthalocyanines bearing non-peripherally substituted mercaptoquinoline moiety

Yasa G., Erdogmus A., Ugur A. L., Şener M. K., Avcıata U., Nyokong T.

JOURNAL OF PORPHYRINS AND PHTHALOCYANINES, vol.16, pp.845-854, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16
  • Publication Date: 2012
  • Doi Number: 10.1142/s1088424612500940
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.845-854
  • Keywords: zinc, magnesium and oxo-titanium phthalocyanines, fluorescence quantum yield, singlet oxygen, WATER-SOLUBLE PHTHALOCYANINES, SINGLET OXYGEN, PHOTODYNAMIC THERAPY, PHOTOSENSITIZERS, ZINC(II), DERIVATIVES, TERTIARY, BEHAVIOR, SERIES
  • Yıldız Technical University Affiliated: Yes


The synthesis, photophysical and photochemical properties of nonperipherally (alpha) mercaptoquinoline substituted Zn(II), TiO(IV) and Mg(II) and quaternized Zn(II) phthalocyanines are described for the first time. These complexes (2 to 5) and their precursor are characterized by elemental analysis, FT-IR, H-1 NMR, electronic spectroscopy as well as mass spectroscopy. Complexes 2, 4 and 5 have good solubility in organic solvents such as CHCl3, DCM, DMSO, DMF, THF and toluene and are not aggregated in all solvents within a wide concentration range. Complex 3 showed very good solubility in water as well as DMSO and DMF. General trends are described for singlet oxygen, photodegradation and fluorescence quantum yields of these complexes in DMSO and DMF. While complex 2 has higher singlet oxygen and fluorescence quantum yields than 3, 4 and 5, complex 4 has higher fluorescence quantum yields in DMF and DMSO than 2, 3 and 5. The effect of the solvents and metal on the photophysical and photochemical parameters of the metallophthalocyanines are also reported.