Two-dimensional infrared femtosecond spectroscopy of cyclic pentapeptides

Piryatinski, Andrei; Chernyak, Vladimir; Mukamel, Shaul
March 2000
AIP Conference Proceedings;2000, Vol. 503 Issue 1, p117
Academic Journal
The multidimensional optical response of the amide I band of the pentapeptide (cyclo(D-Abu-Arg-Gly-Asp-Mamb)) is computed using the vibrational-exciton model, treating each peptide unit as a localized anharmonic vibration. The absolute value, the real and the imaginary parts of the 2D photon echo signal are simulated by solving the nonlinear exciton equations (NEE). The signatures of the one- and two-vibrational-exciton dynamics associated with different models of spectral broadening (homogeneous as well as diagonal and off-diagonal static disorder) are discussed. © 2000 American Institute of Physics.


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