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Title: Solvation dynamics and red-edge effect of two electrically charged solutes in an imidazolium ionic liquid
Authors: Khara, Dinesh Chandra
Samanta, Anunay
Keywords: Ionic liquids;Solvation dynamics;Time-resolved studies;Fluorescence;Red-edge effect;Fluorescent probes
Issue Date: Jun-2010
Publisher: CSIR
Abstract: Steady state and time-resolved fluorescence behavior of two electrically charged solutes, viz., negatively charged 1-anilinonaphthalene-8-sulfonate (ANS) and positively charged ethidium 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][BF4] 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.
Page(s): 714-720
Appears in Collections:IJC-A Vol.49A(05-06) [May-June 2010]

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