Related Experiment Videos
Obtaining absorptive line shapes in two-dimensional infrared vibrational correlation spectra
M Khalil1, N Demirdöven, A Tokmakoff
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Physical Review Letters
|February 7, 2003
Abstract:
Absorptive line shapes in two-dimensional infrared (2D IR) vibrational spectra are important for an intuitive interpretation of molecular structure and dynamics. We obtain an absorptive 2D IR correlation spectrum by summing complementary spectra from experiments sampling vibrational coherences that oscillate with conjugate frequencies in the initial evolution time period. The 2D correlation spectrum of a coupled vibrational system reveals certain spectral features with tilted line shapes that are explained in terms of unequal contributions of Liouville-space pathways.