Octaalkynyltetra[6,7]quinoxalinoporphyrazines: a new class of photosensitisers with potential for photodynamic therapy

Acetylene-substituted tetra[6,7]quinoxalinoporphyrazines, obtained in two steps from dialkynyl-1,2-diones and 1,2-diamino-4,5-dicyanobenzene, show intense absorptions in the near infrared and have photooxidising properties that make them promising candidates as agents active in photodynamic therapy.