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A Hydrogen-Bond Flip-Flop through a Bjerrum-Type Defect


  • This work was supported by the Deutsche Forschungsgemeinschaft through SFB 624 and SFB 813.


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Back and forth: Femtosecond two-dimensional infrared exchange spectroscopy was used to study the dynamics of the reversal of an intramolecular hydrogen bond. The H-bond reversal resembles a flip-flop motion that is facilitated by two concerted disrotatory torsional isomerizations and that occurs on a time scale of about 2 ps.

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