Studies on curcumin and curcuminoids. XLVI. Photophysical properties of dimethoxycurcumin and bis-dehydroxycurcumin

L. Nardo*, A. Andreoni, M. Bondani, M. Másson, T. Haukvik, H. H. Tønnesen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The steady-state absorption and fluorescence, as well as the time-resolved fluorescence properties of dimethoxycurcumin and bis-dehydroxycurcumin dissolved in several solvents differing in polarity and H-bonding capability are presented. The singlet oxygen generation efficiency of the two compounds relative to curcumin is estimated. The photodegradation quantum yield of the former compound in acetonitrile and methanol is determined. The dimethoxycurcumin and bis-dehydroxycurcumin decay mechanisms from the S1 state are discussed and compared with those of curcumin, dicinnamoylmethane and bis-demethoxycurcumin.

Original languageEnglish
Pages (from-to)597-608
Number of pages12
JournalJournal of Fluorescence
Volume22
Issue number2
DOIs
Publication statusPublished - Mar 2012

Other keywords

  • Curcuminoid
  • Excited state intramolecular proton transfer
  • Fluorescence decay mechanisms
  • Intramolecular hydrogen bonding
  • Solute-solvent interactions

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