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

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    • Keywords


      Imidazolium ionic liquids; UV-Vis absorption; excitation wavelength-dependent fluorescence; red-edge effect; solvent effect

    • 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

    • Author Affiliations


      Aniruddha Paul1 Anunay Samanta1

      1. School of Chemistry, University of Hyderabad, Hyderabad - 500 046
    • Dates

  • Journal of Chemical Sciences | News

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