Quantum Yields of Singlet-Oxygen Production by Some Natural Quinoid Fungal Metabolites and Derivatives

✍ Scribed by Taraneh Aminian-Saghafi; Gianluca Nasini; Tullio Caronna; André M. Braun; Esther Oliveros

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: German
• Weight: 446 KB
• Volume: 75
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19920750213

✦ Synopsis

Abstract

Perylene quinone compounds of natural and syntheitc origin have been investigated for their quantum efficiency of singlet‐oxygen production (Φ~Δ~). The results may be interpreted by a qualitative relation between Φ~Δ~ and the planarity of the sensitizer molecules, highest values (0.8–0.9) being observed where planarity is favoring tautomeric structures. On the other hand, derivatives exhibiting non‐planar quinoid structures show lower Φ~Δ~, and methylated derivatives react photochemically.