1 research outputs found
Infrared Spectroscopy as a Probe of Electronic Energy Transfer
We
have combined electronic and vibrational spectroscopy in a cryogenic
ion trap to produce highly resolved, conformer-selective spectra for
the ground and excited states of a peptide containing two chromophores.
These spectra permit us to determine the precise three-dimensional
structure of the peptide and give insight into the migration of the
electronic excitation from phenylalanine to tyrosine because changes
in the excited-state infrared spectra are sensitive to localization
of the electronic energy in each chromophore. The well-controlled
experimental conditions make this result a stringent test for theoretical
methods dealing with electronic energy transfer