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Keywords:

  • fluorescence spectroscopy;
  • ionic liquids;
  • naphthols;
  • proton transfer;
  • UV/Vis spectroscopy
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No fluorescence emission of the naphtholate anion is observed from ionic liquids with an imidazolium cation containing a C2 hydrogen (C2[BOND]H). This is attributed to the formation of a “dark” complex between the imidazolium cation and the excited naphtholate anion.