Characterization of a Novel Intrinsic Luminescent Room-Temperature Ionic Liquid Based on [P-6,P-6,P-6,P-14][ANS]

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Intrinsically luminescent room-temperature ionic liquids (RTILs) can be prepared by combining a luminescent anion (more common) or cation with appropriate counter ions, rendering new luminescent soft materials. These RTILs are still new, and many of their photochemical properties are not well known. A novel intrinsic luminescent RTIL based on the 8-anilinonaphthalene-1-sulfonate ([ANS]) anion combined with the trihexyltetradecylphosphonium ([P-6,P-6,P-6,P-14]) cation was prepared and characterized by spectroscopic techniques. Detailed photophysical studies highlight the in-fluence of the ionic liquid environment on the ANS fluorescence, which together with rheological and H-1 NMR experiments illustrate the effects of both the viscosity and electrostatic interactions between the ions. This material is liquid at room temperature and possesses a glass transition temperature (T-g) of 230.4 K. The fluorescence is not highly sensitive to factors such as temperature, but owing to its high viscosity, dynamic Stokes shift measurements reveal very slow components for the IL relaxation.

Original languageEnglish
Pages (from-to)726-732
Number of pages7
JournalChemistry-A European Journal
Volume21
Issue number2
DOIs
Publication statusPublished - 7 Jan 2015

Keywords

  • ANS
  • fluorescence
  • ionic liquids
  • photophysics
  • rheology
  • DONOR-ACCEPTOR SYSTEMS
  • SOLVATION DYNAMICS
  • FLUORESCENCE PROBES
  • STOKES SHIFT
  • MOLECULES
  • SULFONATE
  • PHOTOPHYSICS
  • SOLVENTS
  • WATER

Cite this