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Synthesis and Electrochemical and Photophysical Studies of Tetrathiafulvalene-Annulated Phthalocyanines

Loosli, Claudia
Jia, Chunyang
Liu, Shi-Xia
Haas, Marco
Dias, Marylène
Levillain, Eric
Neels, Antonia
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Published in Journal of organic chemistry. 2005, vol. 70, no. 13, p. 4988-4992
Abstract The synthesis of tetrakis(tetrathiafulvalene)-annulated metal-free and metallophthalocyanines 5−8 via the tetramerization of the phthalonitrile derivative 4 is reported. All of them have been fully characterized by electronic absorption spectroscopy, thin-layer cyclic voltammetry, mass spectrometry, and elemental analysis. Their solution electrochemical data show two reversible four-electron oxidation waves, indicating that these fused systems are strong π-electron donors, which give rise to tetra- or octaradical cation species. For the metal-free phthalocyanine 5, additionally a reversible one-electron wave was found in the negative direction arising from the reduction of the macrocycle. Moreover, the tetrathiafulvalene unit acts as an efficient reductive electron-transfer quencher for the phthalocyanine emission, but upon its oxidation, an intense luminescence is switched on.
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Research group Groupe Hauser
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LOOSLI, Claudia et al. Synthesis and Electrochemical and Photophysical Studies of Tetrathiafulvalene-Annulated Phthalocyanines. In: Journal of organic chemistry, 2005, vol. 70, n° 13, p. 4988-4992. doi: 10.1021/jo0501801 https://archive-ouverte.unige.ch/unige:3274

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Deposited on : 2009-09-21

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