Chemically and Electrochemically Triggered Assembly of Viologen Radicals: Towards Multiaddressable Molecular Switches.
We have established that bipyridinium radicals can be reversibly $π$-dimerized under the combined effects of chem. (proton transfer) and electrochem. (electron transfer) stimuli. Our investigations also led to the discovery that a bis-pyridinyl appended calixarene intermediate is involved in a fully reversible redox-triggered $\sigma$-dimerization process. The structure of the most stable intramol. $\sigma$-dimer was provided by computational chem. and its complete conversion into a noncovalent $π$-dimer could be triggered chem. by addn. of protons, leading to the formation of protonated cation radicals. Theor. data collected with the N-methylated and N-protonated $π$-dimers also support the existence of multivariant orientations in $π$-bonded dimers of viologen cation-radicals. [on SciFinder(R)]
Références
- Titre
- Chemically and Electrochemically Triggered Assembly of Viologen Radicals: Towards Multiaddressable Molecular Switches.
- Type de publication
- Article de revue
- Année de publication
- 2015
- Auteurs
- Kahlfuss, Christophe, Metay Estelle, Duclos Marie-Christine, Lemaire Marc, Milet Anne, Saint-Aman Eric, and Bucher Christophe
- Revue
- Chem. - A Eur. J.
- Volume
- 21
- Pagination
- 2090–2106
- ISSN
- 0947-6539
Soumis le 12 avril 2018