Quartic interband exciton couplings in pump- probe spectroscopy of light harvesting complexes

Article Abstract:

Quartic couplings dominate the interband interactions between chromophores whose excitation frequences are well separated. It is shown that the later are responsible for spectral line shifts of the Carotenoids observed in pump- probe experiments of LH2 photosynthetic antenna following excitation of the chrolophylls.

Spectrum analysis, Spectroscopy, Photosynthesis, Chromophores

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Peptide secondary structure determination by three-pulse coherent vibrational spectroscopes: A simulation study

Article Abstract:

Techniques such as X-ray crystallography and nuclear magnetic resonance (NMR) provided useful atomic resolution information but NMR only provided direct real time information on a millisecond time scale. Time-resolved X-ray diffraction was carried out with a picosecond resolution.

Analysis, Peptides, X-rays, X-ray diffraction, X-ray crystallography, Spectra, Structure

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Vibrational-exciton couplings for the amide I, II, III, and A modes of peptides

Article Abstract:

The calculation results of the coupling between all amide fundamentals and their overtones and combination vibrational states are presented.

Exciton theory, Excitons, Amides, Vibration research, Chemical properties

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