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Issue 23, 2016
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Dynamics of intermolecular interactions in CCl4via the isotope effect by femtosecond time-resolved spectroscopy

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Abstract

We report our study on the ultrafast dynamics of intermolecular interactions in liquid CCl4. A transient transmission time domain signal, obtained in the 40 ps delay range, exhibits beating at the difference frequency of the totally symmetric stretching vibrations of the tetrachloride isotopologues. We show that the spectra obtained as the windowed Fourier transform of different parts of the time domain signal in the range of this totally symmetric vibration, split due to the isotope effect, carry the information about the dynamics of the coherently excited, coupled molecules. We use a simple theoretical model in order to prove that the intermolecular interaction influences the relative amplitudes of the isotopologue peaks in the spectrum. Moreover, we demonstrate that the pump induced coherence in the system leads to additional strengthening of the interaction, which can be observed in the spectra obtained from the experimental time domain signal.

Graphical abstract: Dynamics of intermolecular interactions in CCl4via the isotope effect by femtosecond time-resolved spectroscopy

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Article information


Submitted
14 Jan 2016
Accepted
16 May 2016
First published
18 May 2016

Phys. Chem. Chem. Phys., 2016,18, 16046-16054
Article type
Paper

Dynamics of intermolecular interactions in CCl4via the isotope effect by femtosecond time-resolved spectroscopy

J. Konarska, W. Gadomski, B. Ratajska-Gadomska, K. Polok, G. Pudłowski and T. M. Kardaś, Phys. Chem. Chem. Phys., 2016, 18, 16046
DOI: 10.1039/C6CP00270F

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