Three-pulse photon echo experiments in the infrared region have been performed to study vibrational dephasing and transition frequency fluctuations in solutions. Time-integrated and frequency-resolved photon echo signals of the –N=C=N– anti-symmetric stretching mode of di-p-tolylcarbodiimide show an oscillatory behavior due to interference with a band nearby. Solvation dynamics or frequency fluctuations of several ions in hydrogen-bonding solvents have been studied and a couple of general trends of the time-correlation function of the frequency fluctuation on these systems have been observed.
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Maekawa, H., Ohta, K. & Tominaga, K. Vibrational dynamics in liquids studied by non-linear infrared spectroscopy. Res Chem Intermediat 31, 703–716 (2005). https://doi.org/10.1163/1568567054909069
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DOI: https://doi.org/10.1163/1568567054909069