Infrared Spectroscopy as a Probe of Electronic Energy Transfer

We have combined electronic and vibrational spec- troscopy 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.


Publié dans:
The Journal of Physical Chemistry Letters, 9, 12, 3217-3223
Année
2018
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 Notice créée le 2018-09-22, modifiée le 2019-05-07

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