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Article Dans Une Revue Nanoscale Année : 2019

Multi-functional switches of ditopic ligands with azobenzene central bridges at a molecular scale

Résumé

Ligands are designed to have ditopic bipyridine terminal groups linked through photochromic azobenzene central units, which exhibit multi-switchable properties by different external stimuli. The molecule can switch between cis-and trans-conformations at their bipyridine terminal groups upon protonation and at their central azobenzene units upon irradiation of photons. As a result, the system shows four different isomeric states: cis–TRANS, trans–TRANS, cis–CIS and trans–CIS. The four conformers are switched and are visualized by scanning tunneling microscopy at the solid–liquid interface, which gives a direct demonstration of the multi-functional switches at a molecular level.

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Dates et versions

hal-03206793 , version 1 (23-04-2021)

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Imen Hnid, Xiaonan Sun, Denis Frath, Frédéric Lafolet, Jean-Christophe Lacroix. Multi-functional switches of ditopic ligands with azobenzene central bridges at a molecular scale. Nanoscale, 2019, 11 (47), pp.23042-23048. ⟨10.1039/C9NR06350A⟩. ⟨hal-03206793⟩
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