Abstract

Dual-frequency 2D IR heterodyned photon echo experiments with independently tunable mid-IR pulses are presented. 2D IR spectra acquired using a sequence of 3, 3, and 6 µm pulses allow observation of NH and CO stretching mode interaction. Intermolecular hydrogen bonding between NH and CO groups is characterized via observation of interaction of the NH and CO vibrational modes. Structural and dynamical parameters determined include the mode coupling, angular constraints, and a correlation factor for the frequency distributions.

© 2004 Optical Society of America