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 language | English |
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Pages (from-to) | 714-720 |
Number of pages | 7 |
Journal | Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry |
Volume | 49 |
Issue number | 5-6 |
State | Published - 1 May 2010 |
Externally published | Yes |
Keywords
- Fluorescence
- Fluorescent probes
- Ionic liquids
- Red-edge effect
- Solvation dynamics
- Time-resolved studies
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry