Solvation dynamics and red-edge effect of two electrically charged solutes in an imidazolium ionic liquid

Dinesh Chandra Khara, Anunay Samanta

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Steady state and time-resolved fluorescence behavior of two electrically charged solutes, viz., negatively charged l-anilinonaphthalene-8-sulfonate (ANS) and positively charged efhidium bromide (EB), have been studied in an imidazolium ionic liquid. It is found that EB shows a much less pronounced excitation wavelength dependent fluorescence behavior (red-edge effect) as compared to ANS. The solvation dynamics of these probes in [bmim][BF 4] is found to be similar to those observed with neutral dipolar probes. A higher solvation time of EB as compared to ANS is possibly a reflection of hydrogen bonding interaction of the former system with the anionic component of the ionic liquid.

Original languageEnglish
Pages (from-to)714-720
Number of pages7
JournalIndian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry
Volume49
Issue number5-6
StatePublished - 1 May 2010
Externally publishedYes

Keywords

  • Fluorescence
  • Fluorescent probes
  • Ionic liquids
  • Red-edge effect
  • Solvation dynamics
  • Time-resolved studies

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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