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Light‐Gated Rotation in a Molecular Motor Functionalized with a Dithienylethene Switch
Author(s) -
Roke Diederik,
Stuckhardt Constantin,
Danowski Wojciech,
Wezenberg Sander J.,
Feringa Ben L.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201802392
Subject(s) - photoswitch , molecular motor , molecular switch , moiety , wavelength , photochromism , photochemistry , visible spectrum , chemistry , rotation around a fixed axis , materials science , optoelectronics , molecule , nanotechnology , stereochemistry , organic chemistry , physics , classical mechanics
A multiphotochromic hybrid system is presented in which a light‐driven overcrowded alkene‐based molecular rotary motor is connected to a dithienylethene photoswitch. Ring closing of the dithienylethene moiety, using an irradiation wavelength different from the wavelength applied to operate the molecular motor, results in inhibition of the rotary motion as is demonstrated by detailed 1 H‐NMR and UV/Vis experiments. For the first time, a light‐gated molecular motor is thus obtained. Furthermore, the excitation wavelength of the molecular motor is red‐shifted from the UV into the visible‐light region upon attachment of the dithienylethene switch.