Fig. 4: Isomerization behaviour of 1 in apolar and polar solvents.
From: Controlling forward and backward rotary molecular motion on demand
a UV-vis absorption spectra of 1 (1.0·10–5 m) in cyclohexane at 20 °C before and after irradiation to PSS using LEDs of different wavelength. The inset shows a fatigue study where the absorbance at 492 nm was followed over ten subsequent 180° rotations. b + c 1H NMR spectra of 1 (2.5·10–3 m) before and after irradiation to PSS as well as after completed THI (b: toluene-d8, −59 °C, 530 nm LED; c: CD2Cl2, −85 °C, 470 nm LED).
