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Optical absorption and fluorescence studies on imidazolium ionic liquids comprising thebis(trifluoromethanesulphonyl)imide anion

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Abstract

Optical absorption and fluorescence behaviour of two rigorously purified imidazolium ionic liquids, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide and 1-ethyl-3-methylimidazoliumbis(trifluoromethanesulfonyl)imide are studied in the neat condition and in solution. Non-negligible absorption in the UV region with a long tail extending into the visible region is the main feature of the absorption. Excitation wavelength-dependent two-component fluorescence characterizes the emission behaviour of these liquids. That ion association gives rise to the long absorption tail and shifting fluorescence maximum, which appears to be common to most of the imidazolium ionic liquids, is evident from the effect of the conventional solvents

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Authors and Affiliations

  1. School of Chemistry, University of Hyderabad, 500 046, Hyderabad

    Aniruddha Paul & Anunay Samanta

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  1. Aniruddha Paul
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  2. Anunay Samanta
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Correspondence to Anunay Samanta.

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Paul, A., Samanta, A. Optical absorption and fluorescence studies on imidazolium ionic liquids comprising thebis(trifluoromethanesulphonyl)imide anion. J Chem Sci 118, 335–340 (2006). https://doi.org/10.1007/BF02708527

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  • DOI: https://doi.org/10.1007/BF02708527

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