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Keywords:

  • Dyes;
  • Chromophores;
  • Macrocycles;
  • Photodynamic therapy;
  • Diels–Alder;
  • Domino reactions

Abstract

The synthesis of a new octa-tert-butylphthalocyanine is described. First, the 4,5-di-tert-butylphthalonitrile building block was synthesized in a six-step approach, in which the last step is a three reaction domino sequence. Then, this phthalonitrile was cyclotetramerized to furnish a new phthalocyanine dye, which presented no aggregation in solution and good photophysical properties.