Light‐gated rotation in a molecular motor functionalized with a dithienylethene switch

D Roke, C Stuckhardt, W Danowski… - Angewandte …, 2018 - Wiley Online Library
D Roke, C Stuckhardt, W Danowski, SJ Wezenberg, BL Feringa
Angewandte Chemie, 2018Wiley Online Library
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 1H‐NMR and UV/Vis experiments. For the first time, a light‐gated
molecular motor is thus obtained. Furthermore, the excitation wavelength of the molecular …
Abstract
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 1H‐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.
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