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Title: Femtosecond time-resolved electronic relaxation dynamics in tetrathiafulvalene

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.
Authors:
;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5]
  1. Laboratoire de Collisions, Agrégats et Réactivité, IRSAMC, Université de Toulouse-CNRS, 31062 Toulouse (France)
  2. (Canada)
  3. Centre des Laser Intenses et Applications, Université de Bordeaux-CNRS, 33405 Talence (France)
  4. Chemistry Department, University of Ottawa, Ottawa, Ontario K1N 6N5 (Canada)
  5. (France)
Publication Date:
OSTI Identifier:
22415800
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 142; Journal Issue: 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTRA; CATIONS; DIMERS; EV RANGE; IMAGES; INTERNAL CONVERSION; PROBES; RELAXATION; TETRATHIAFULVALENE; TIME RESOLUTION; TRANSIENTS; VELOCITY