Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 114, Issue 27, Pages 7315-7320Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp9111124
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Funding
- The Netherlands Organization for Scientific Research (NWO)
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A simulation study of the coupled dynamics of amide I and amide II vibrations in an a-helix dissolved in water shows that two-dimensional (2D) infrared spectroscopy may be used to disentangle the energy transport along the helix through each of these modes from the energy relaxation between them. Time scales for both types of processes are obtained. Using polarization-dependent 2D spectroscopy is an important ingredient in the method we propose. The method may also be applied to other two-band systems, both in the infrared (collective vibrations) and the visible (excitons) parts of the spectrum.
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