Thermal and photochemical properties of 4′-hydroxyflavylium in water-ionic liquid biphasic systems

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Abstract

The multistate/multifunctional properties of 4′-hydroxyflavylium in a water/1-n-butyl-3-methyl-imidazolium hexafluorophosphate ([bmim][PF6]) biphasic system are described. The kinetics and thermodynamics of this flavylium salt have been fully characterised in aqueous solutions and compared to those obtained in [bmim][PF6]. The trans-chalcone is thermally more stable in the ionic liquid but shows efficient photoisomerisation to the cis-chalcone, allowing to define write - read - erase cycles in this biphasic system.

Original languageEnglish
Pages (from-to)185-189
Number of pages5
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume168
Issue number3
DOIs
Publication statusPublished - 1 Dec 2004

Keywords

  • Flavylium salts
  • Ionic liquids
  • Multistate systems
  • Photochromic systems

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