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.
|Number of pages||5|
|Journal||Journal of Photochemistry and Photobiology A: Chemistry|
|Publication status||Published - 1 Dec 2004|
- Flavylium salts
- Ionic liquids
- Multistate systems
- Photochromic systems