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Keywords:

  • IR spectroscopy;
  • ion pairs;
  • non-ergodic behavior;
  • pyridinium ions;
  • triflate
Thumbnail image of graphical abstract

Too much heat in non-covalent complexes leads to non-ergodic behavior in ion pairs of nitrogen-containing cations with triflate counterions. In their Communication on page 10050 ff., D. Schröder et al. show by means of infrared spectroscopy of mass-selected ions that the effect is caused by incomplete intramolecular vibrational energy distribution, leading to a local “overheating” of the triflate counterions. PS: Find the hidden dedication in the picture! The puzzle will be solved on the homepage of ChemViews Magazine (http://www.chemviews.org).