Solvent and central metal effects on the photophysical and photochemical properties of 4-benzyloxybenzoxy substituted phthalocyanines

SAKA E. T., Durmus M., KANTEKİN H.

JOURNAL OF ORGANOMETALLIC CHEMISTRY, cilt.696, sa.4, ss.913-924, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 696 Sayı: 4
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.jorganchem.2010.10.024
  • Dergi Adı: JOURNAL OF ORGANOMETALLIC CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.913-924
  • Anahtar Kelimeler: Phthalocyanine, Solvent effect, Fluorescence, Quantum yields, Singlet oxygen, Photodegradation, ZINC PHTHALOCYANINE, PHOTODYNAMIC THERAPY, SPECTROSCOPIC PROPERTIES, QUANTUM YIELDS, COMPLEXES, DERIVATIVES, PHOTOSENSITIZERS, AGGREGATION, SILICON, SINGLET
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

The synthesis and characterization of new peripherally tetra-4-benzyloxybenzoxy substituted metal-free, zinc and lead phthalocyanines are described for the first time in this study. The influence of various organic solvents and the nature of the central metal ion on the spectroscopic, photophysical and photochemical properties has been investigated. General trends are described for photodegradation, singlet oxygen and fluorescence quantum yields, and fluorescence lifetimes of these compounds in different solvents. Photophysical and photochemical properties of phthalocyanine compounds are very useful for photodynamic therapy applications. Especially high singlet oxygen quantum yields are very important for Type II mechanism. The studied phthalocyanine compounds showed good singlet oxygen generation and these compounds show potential as Type II photosensitizers. The fluorescences of the studied compounds are effectively quenched by 1,4-benzoquinone in different solvents. (C) 2010 Elsevier B.V. All rights reserved.