Issue |
J. Phys. IV France
Volume 114, April 2004
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Page(s) | 509 - 510 | |
DOI | https://doi.org/10.1051/jp4:2004114118 |
J. Phys. IV France 114 (2004) 509
DOI: 10.1051/jp4:2004114118
Intramolecular electron transfer mediated by a tetrathiafulvalene (TTF) bridge
P. Hudhomme1, 1, F. Dumur1, N. Gautier1, A. Gorgues1, V. Lloveras2, J. Vidal-Gancedo2, J. Veciana2, J. Veciana2 and C. Rovira21 Laboratoire Ingénierie Moléculaire et Matériaux Organiques, UMR CNRS 6501, 2 Bd. Lavoisier, 49045 Angers, France
2 Institut de Ciència de Materials de Barcelona (CSIC), Campus Universitari de Bellaterra, 08193 Cerdanyola, Spain
Abstract
Unprecedented fused acceptor-donor-acceptor triad
(Q-TTF-Q) incorporating the donor tetrathiafulvalene (TTF) and the acceptor
p-benzoquinone (Q) has been synthesized. The solution UV-Vis spectrum
displays a low energy absorption band which is attributed to an
intramolecular charge transfer between both antagonistic units. The presence
of reversible oxidation and reduction waves for the donor and acceptor
moieties was in agreement with the ratio TTF/quinones units. The monoradical
anion Q-TTF-Q
-. was generated upon chemical reduction and monitored by
ESR spectroscopy. This was demonstrated as a Class II mixed valence system
with the existence of a temperature dependent intramolecular electron
transfer.
Key words. Electron transfer - Tetrathiafulvalene - Quinone.
© EDP Sciences 2004