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Updated: Apr 12, 2026

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
Femtosecond time-resolved electronic relaxation dynamics in tetrathiafulvalene
D Staedter1, N Thiré1, L Polizzi1
1Laboratoire de Collisions, Agrégats et Réactivité, IRSAMC, Université de Toulouse-CNRS, 31062 Toulouse, France.
Abstract:
In the present paper, the ultrafast electronic relaxation of tetrathiafulvalene (TTF) initiated around 4 eV is studied by femtosecond time-resolved velocity-map imaging. The goal is to investigate the broad double structure observed in the absorption spectrum at this energy. By monitoring the transients of the parent cation and its fragments and by varying the pump and the probe wavelengths, two internal conversions and intramolecular vibrational relaxation are detected both on the order of a few hundred of femtoseconds. Photoelectron images permit the assignment of a dark electronic state involved in the relaxation. In addition, the formation of the dimer of TTF has been observed.
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