Reversible Photoswitching and Isomer‐Dependent Diffusion of Single Azobenzene Tetramers on a Metal Surface

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Abstract: Azobenzene is a prototypical molecular switch that can be reversibly photoisomerized between the nearly planar and apolar trans form, and the distorted, polar cis form. Most studies related to azobenzene derivatives have focused on planar adsorbed molecules. We present herein the study of a three‐dimensional shape‐persistent molecular architecture consisting of four tetrahedrally arranged azobenzene units that is adsorbed on a Ag (111) surface. While the azobenzenes of the tripod in contact with the surface lost their switching ability, different isomers of the upright standing arm of the tetramer were obtained reversibly and efficiently by illumination at different wavelengths, revealing time constants of only a few minutes. Diffusion on the surface was dependent on the isomeric state—trans or cis—of the upright oriented azobenzene group. Hence, molecular mobility can be modulated by its isomeric state, which suggests that molecular growth processes could be controlled by external stimuli.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Reversible Photoswitching and Isomer‐Dependent Diffusion of Single Azobenzene Tetramers on a Metal Surface ; volume:130 ; number:46 ; year:2018 ; pages:15254-15259 ; extent:6
Angewandte Chemie ; 130, Heft 46 (2018), 15254-15259 (gesamt 6)

Creator: Nacci, Christophe
Baroncini, Massimo
Credi, Alberto
Grill, Leonhard

DOI: 10.1002/ange.201806536

URN: urn:nbn:de:101:1-2022082408563355527896

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 15.08.2025, 7:33 AM CEST

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Nacci, Christophe
Baroncini, Massimo
Credi, Alberto
Grill, Leonhard

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