Studies on Curcumin and Curcuminoids. XXXIX. Photophysical Properties of Bisdemethoxycurcumin

✍ Scribed by Luca Nardo; Alessandra Andreoni; Màr Masson; Tone Haukvik; Hanne Hjorth Tønnesen

• Book ID: 106412963
• Publisher: Springer
• Year: 2010
• Tongue: English
• Weight: 314 KB
• Volume: 21
• Category: Article
• ISSN: 1053-0509
• DOI: 10.1007/s10895-010-0750-x

✦ Synopsis

The steady-state absorption and fluorescence, as well as the time-resolved fluorescence properties of bisdemethoxycurcumin dissolved in several solvents differing in polarity and H-bonding capability were measured. The photodegradation quantum yield of the compound in acetonitrile and methanol was determined. The bisdemethoxycurcumin decay mechanisms from the S ~1~ state were discussed and compared with those of curcumin. The differences in S ~1~ dynamics observed between bisdemethoxy-curcumin and curcumin could be ascribed to a difference in H-bond acceptor/donor properties of the phenolic OH and a difference in strength of the intramolecular H-bond in the keto-enol moiety within the two molecules.