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Inside Back Cover: Reversible Photoswitching and Isomer‐Dependent Diffusion of Single Azobenzene Tetramers on a Metal Surface (Angew. Chem. Int. Ed. 46/2018)
Author(s) -
Nacci Christophe,
Baroncini Massimo,
Credi Alberto,
Grill Leonhard
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201811917
Subject(s) - azobenzene , tetramer , photochromism , isomerization , molecule , tripod (photography) , chemistry , diffusion , wavelength , crystallography , photoisomerization , materials science , chemical physics , photochemistry , optics , physics , optoelectronics , organic chemistry , thermodynamics , catalysis , enzyme
Shape‐persistent molecules comprising four azobenzene switching units were adsorbed on a metal surface, as described in the Communication by A. Credi, L. Grill et al. on page 15034. Isomer‐dependent diffusion was found, and it is shown that the diffusive motion can be turned on and off in a single molecule by tip‐induced isomerization. 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 through illumination at different wavelengths, revealing time constants of a few minutes.