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Title

Tetrathiafulvalene-Benzothiadiazoles as Redox-Tunable Donor-Acceptor Systems: Synthesis and Photophysical Study

Authors
Pop, Flavia
Amacher, Anneliese
Avarvari, Narcis
Hauser, Jürg
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Published in Chemistry - A European Journal. 2013, vol. 19, no. 7, p. 2504-2514
Abstract Electrochemical and photophysical analysis of new donor–acceptor systems 2 and 3, in which a benzothiadiazole (BTD) unit is covalently linked to a tetrathiafulvalene (TTF) core, have verified that the lowest excited state can be ascribed to an intramolecular-charge-transfer (ICT) π(TTF)→π*(benzothiadiazole) transition. Owing to better overlap of the HOMO and LUMO in the fused scaffold of compound 3, the intensity of the 1ICT band is substantially higher compared to that in compound 2. The corresponding CT fluorescence is also observed in both cases. The radical cation TTF+. is easily observed through chemical and electrochemical oxidation by performing steady-state absorption experiments. Interestingly, compound 2 is photo-oxidized under aerobic conditions.
Keywords Charge transferDonor-acceptor systemsFluorescencePhotophysicsRedox chemistry
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Other version: http://doi.wiley.com/10.1002/chem.201202742
Structures
Research groups Groupe Hauser
Groupe Vauthey
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POP, Flavia et al. Tetrathiafulvalene-Benzothiadiazoles as Redox-Tunable Donor-Acceptor Systems: Synthesis and Photophysical Study. In: Chemistry - A European Journal, 2013, vol. 19, n° 7, p. 2504-2514. https://archive-ouverte.unige.ch/unige:26401

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Deposited on : 2013-02-19

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