The 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 (approximately 3-5 x 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. Structural analysis of the photodegradation products of compound 2 in more concentrated solution (approximately 3.6 x 10(-3) mol l(-1)) shows formation of benzaldehyde, cinnamaldehyde, 2'-hydroxy-5',6'-benzochalcone 4, flavanone 5 and some other unidentified photoproducts. Flavanone 5 is formed by irradiation of chalcone 4. It represents a unique example of photochemical conversion of a diarylheptanoid molecule into a flavonoid, another very important class of natural products.

Agus Sundaryono

Aziz Nourmamode

Christian Gardrat

Stéphane Grelier

Georges Bravic

Daniel Chasseau

Alain Castellan

Photochemical & Photobiological Sciences

A society-owned journal publishing high quality research on all aspects of photochemistry and photobiology.

Photochemical and Photobiological Sciences is a society-owned journal dedicated to publishing high-quality research on all aspects of photochemistry and photobiology.

《Photochemical and Photobiological Sciences》是一本由学会主办的期刊，致力于发表关于光化学和光生物学各个方面的高质量研究。

Photochemical and Photobiological Sciences

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

The comparative photostability of curcumin 1, and two non-phenolicCurcuminoids: 1,7-diphenyl-1,6-heptadiene-3,5-dione 2 and dimethylcurcumin 3 in non-degassed dilute solutions has been established by UV-visible absorption spectroscopy; disappearance quantum yields were measured.

Category	Quartile
化学	3
化学, 生物物理	3
化学, 生化与分子生物学	4
化学, 物理化学	4

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

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Journal Info

Category	Quartile
CHEMISTRY, PHYSICAL	3