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Title

Tetrathiafulvalene-Benzothiadiazoles as Redox-Tunable Donor-Acceptor Systems: Synthesis and Photophysical Study
Authors
Pop, Flavia
Amacher, Anneliese
Avarvari, Narcis
Ding, Jie
Lawson Daku, Latevi Max
Hauser, Andreas
Koch, Marius
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 transfer — Donor-acceptor systems — Fluorescence — Photophysics — Redox chemistry
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Structures
Faculté des sciences / Section de chimie et biochimie / Département de chimie physique
Research groups Groupe Hauser
Groupe Vauthey
Citation
(ISO format) 		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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