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Femtosecond time-resolved electronic relaxation dynamics in tetrathiafulvalene
Author(s) -
David Staedter,
Nicolas Thiré,
L. Polizzi,
Y. Mairesse,
P. Mayer,
Valérie Blanchet
Publication year - 2015
Publication title -
the journal of chemical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 357
eISSN - 1089-7690
pISSN - 0021-9606
DOI - 10.1063/1.4921319
Subject(s) - femtosecond , tetrathiafulvalene , intramolecular force , relaxation (psychology) , dimer , ultrashort pulse , absorption (acoustics) , vibrational energy relaxation , electronic structure , materials science , chemistry , molecular physics , atomic physics , optics , computational chemistry , laser , molecule , physics , stereochemistry , psychology , social psychology , organic chemistry , composite material
International audienceIn the present paper the ultrafast electronic relaxation of tetrathiafulvalene (TTF) initiated around 4 eV is studied for the first time by femtosecond time-resolved velocity-map imaging. The goal is to enlighten the broad double structure observed in the absorption spectrum at such energy. By monitoring the transients of the parent cation and its fragments and by varying both the pump and probe wavelengths, two internal conversions are detected with typical time constants of 260 fs and of 600 fs as well as intramolecular vibrational relaxation. Photoelectron images strengthen the analysis of the relaxation process. In addition the formation of the dimer of TTF has been revealed

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