39 research outputs found

    Ultrafast intramolecular energy transfer in water

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    An unexpectedly fast (0.2 ps) intramolecular energy conversion occurring in H2O molecules has been revealed using frequency-resolved mid-infrared pump-probe spectroscopy in the spectral region of the OH-stretching vibration.</p

    Femtosecond vibrational dynamics in water nano-droplets

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    Water is probably the most researched substance on Earth. The interest in water, and redominantly in liquid water, is due to its importance on both macro- and microscopic scales. Although people have been trying to understand water for centuries, this ubiquitous liquid is still surrounded by mystery and has never stopped intriguing us. Even nowadays, we are sometimes powerless in front of large floods provoked by tsunamis or hurricanes. Zie: Summary

    Dissimilar Dynamics of Coupled Water Vibrations

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    Dissimilar dynamics of coupled stretch vibrations of a water molecule are revealed by two-dimensional IR correlation spectroscopy. These are caused by essentially non-Gaussian fluctuations of the electric field exerted by the environment on the individual OH stretch vibrations. Non-Gaussian statistics of the individual site frequency fluctuations results in distinctively different dephasing of the symmetric and asymmetric eigenmodes. This phenomenon can only be described if the assumption of Gaussian dynamics in the traditional theories is abandoned.
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