Subpicosecond conformational dynamics of small peptides probed by two-dimensional vibrational spectroscopy |
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| Authors: | Woutersen S Mu Y Stock G Hamm P |
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| Affiliation: | Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Strasse 2A, D-12489 Berlin, Germany. |
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| Abstract: | The observation of subpicosecond fluctuations in the conformation of a small peptide in water is demonstrated. We use an experimental method that is specifically sensitive to conformational dynamics taking place on an ultrafast time scale. Complementary molecular-dynamics simulations confirm that the conformational fluctuations exhibit a subpicosecond component, the time scale and amplitude of which agree well with those derived from the experiment. |
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