Structural Dynamics of a Small Peptide Helix by Time Dependent Nonlinear 2D-IR Spectroscopy

摘要

Nonlinear 3D-IR spectroscopy on the amide I states of small model peptides shows exciton spectral diffusion and inter-exciton cross-relaxation (exciton migration), which is related to ultrafast structural motion of the backbone in a site-selective fashion.