Coherent 2D IR spectroscopy offers a powerful technique for studying molecular structure and their ultrafast dynamics. The waiting-time dependence of 2D IR spectra can reveal dynamical processes such as vibrational relaxation, energy and coherence transfer, frequency fluctuation correlation, and chemical exchange. This talk will present two recent applications: i) interactions of peptide side chains with bilayer membranes and ii) picosecond conformational exchange involving internal rotation. The experimental results are compared with those from molecular dynamics simulations, density functional theory calculations, and stochastic simulation.

Ultrafast 2D IR spectroscopy of molecular dynamics: Peptide-membrane interaction and conformational exchange

239th National Meeting (2010)

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