Studies on curcumin and curcuminoids. XXXIX. Photophysical properties of bisdemethoxycurcumin.
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.
Department of Physics and Mathematics, University of Insubria and C.N.I.S.M.-C.N.R., Via Valleggio, 11- 22100 Como, Italy. luca.nardo@uninsubria.it
Luca
L
Nardo
Alessandra
A
Andreoni
Màr
M
Masson
Tone
T
Haukvik
Hanne Hjorth
HH
Tønnesen
D000042:Absorption; D003474:Curcumin / Q000031:analogs & derivatives* / Q000737:chemistry; D036381:Diarylheptanoids; D010782:Photolysis; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence
D036381:Diarylheptanoids; D012997:Solvents; C034786:bisdemethoxycurcumin; D003474:Curcumin