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Quantum Yields of Singlet‐Oxygen Production by Some Natural Quinoid Fungal Metabolites and Derivatives
Author(s) -
AminianSaghafi Taraneh,
Nasini Gianluca,
Caronna Tullio,
Braun André M.,
Oliveros Esther
Publication year - 1992
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19920750213
Subject(s) - planarity testing , chemistry , singlet oxygen , perylene , tautomer , singlet state , molecule , photochemistry , oxygen , quantum chemical , computational chemistry , stereochemistry , organic chemistry , crystallography , atomic physics , excited state , physics
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.