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Keywords:

  • gas-phase reactions;
  • kinetics;
  • photophysics;
  • time-resolved spectroscopy
Thumbnail image of graphical abstract

Femtosecond time-resolved spectroscopy can open the window to fascinating new perspectives of internal conversion processes. In their Communication on page 2247 ff., T. I. Sølling, K. B. Møller, and co-workers show that the S2 to S1 transition of a series of cyclic ketones is mediated by very few degrees of freedom. This knowledge makes it possible to predict and influence the transition dynamics through modification of the molecular structure.