Studies on the photochemistry of 1,7-diphenyl-1,6-heptadiene-3,5-dione, a non-phenolic curcuminoid model

Agus Sundaryono (1) , Aziz Nourmamode (1) , Christian Gardrat (1) , Stéphane Grelier (1) , Georges Bravic (2) , Daniel Chasseau (2) , Alain Castellan (1)

1 Laboratoire de Chimie des Substances Végétales
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

he comparative photostability of curcumin 1, and two non-phenolic curcuminoids: 1,7-diphenyl-1,6-heptadiene-3,5-dione 2(unsubstituted curcumin) and dimethylcurcumin 3 in non-degassed dilute solutions (3–5 × 10–5 mol l–1) has been established by UV-visible absorption spectroscopy; disappearance quantum yields were measured. The similar behavior of the three studied curcuminoids is indicative of only a moderate role of phenol groups in the photodegradation process.

Mots clés: Ketones; Photochemistry; Flavonoids; Cyclization; Curcumin; Diphenylheptadienedione

Domaines: Matériaux

Agus Sundaryono, Aziz Nourmamode, Christian Gardrat, Stéphane Grelier, Georges Bravic, et al.. Studies on the photochemistry of 1,7-diphenyl-1,6-heptadiene-3,5-dione, a non-phenolic curcuminoid model. Photochemical & Photobiological Sciences , 2003, 2 (9), pp.914-920. ⟨10.1039/b301229h⟩. ⟨hal-00177573⟩